Trilobites, Mountains and Marine Deposits - Evidence of a flood?

Sorted by magic by gods that want to deceive people.Because if they wanted to provide evidence of a fantastic flying flood fantasy they wouldn't sort radioactive isotopes in matching layers with species of trilobites (or foraminifera or diatoms).It has to be god-magic because water doesn't have a brain or means to sense things. Nor does it get suddenly endowed with such powers during a flood except by god-magic.Pick up whole layers of living fully developed marine ecosystems, transport them undamaged hundreds of miles to pile them up where a mountain will be pushed up by flood water ... it's all god-magic.How silly to think that the deposits occur over long periods of time with the radioactive isotopes being deposited gradually year after year after year, as the evolving foraminifera and the evolving diatoms die and their shells deposit on the ocean floor year after year after year, as the evolving trilobites lived and died on the ocean floor year after year after year.Curious how that so thoroughly explains the sorting of the radioactive isotopes and the sorting of different evolved species of foraminifera, diatoms, trilobites, etc, into matching layers worldwide. Without effort. Without god-magic. Without changing the laws of physics or the behavior of water. without having to make stuff up.Why would anyone think such a silly thing when it is much more rational to make up wild scenarios, that keep getting wilder the more things are brought up that need to be explained by the god-magic while pretending that it is scientific.How silly.EnjoyEdited by RAZD, : .

At high tide during storms. It can also be eroded. I have watched both at my parents house. I always wanted to mount a camera to show the shore at low tide to show the changing nature of an active shoreline.You can also get some sand blown up from the shore at low tide when it is dry. This is what builds dunes, not water, over long expanses of time.Enjoy.

And again the topic is Trilobites, Mountains and Marine Deposits - Evidence of a flood?Sediments running uphill are not the topic.Fossils of trilobites sorted with radioactive isotopes in thick layers with different trilobite species and different isotopes, ...Layers of fully developed marine ecosystems where organisms grow on the detritus of previous generations and the gradual accumulation of silts, ... including radioactive silts, ...Mountains uplifted with meters and meters and meters deep layers of marine growth, volumes of growth that would cover the earth several times over if they all lived spread out over the earth at the same time ...Brachiopods and other marine growth showing the duration of living organisms for each layer were in the decades ...It all adds up to an old earth ...Lacking is any mixing of species and isotope sediments that would occur with a flying flood fantasy that terraforms the earth to current day appearance in less than a thousand years.Unless you invoke magic.The sorted fossils
The sorted isotopes matching the sorted fossils everywhere on earth
The iridium layer all over the earth with fossils below never appearing above it and fossils above it never appearing below it.Only by old age and uniform laws of physics and biology ... or magic.Enjoy

And again the topic is Trilobites, Mountains and Marine Deposits - Evidence of a flood?Sediments running uphill are not the topic.Fossils of trilobites sorted with radioactive isotopes in thick layers with different trilobite species and different isotopes, ...Layers of fully developed marine ecosystems where organisms grow on the detritus of previous generations and the gradual accumulation of silts, ... including radioactive silts, ...Mountains uplifted with meters and meters and meters deep layers of marine growth, volumes of growth that would cover the earth several times over if they all lived spread out over the earth at the same time ...Brachiopods and other marine growth showing the duration of living organisms for each layer were in the decades ...It all adds up to an old earth ...Lacking is any mixing of species and isotope sediments that would occur with a flying flood fantasy that terraforms the earth to current day appearance in less than a thousand years.Unless you invoke magic.The sorted fossils
The sorted isotopes matching the sorted fossils everywhere on earth
The iridium layer all over the earth with fossils below never appearing above it and fossils above it never appearing below it.Only by old age and uniform laws of physics and biology ... or magic. In other words, magic.Enjoy

Proving you have no idea what you are talking about.

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What are Trilobites?

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Trilobites are remarkable, hard-shelled, segmented creatures that existed over 520 million years ago in the Earth's ancient seas. They went extinct before dinosaurs even came into existence, and are one of the key signature creatures of the Paleozoic Era, the first era to exhibit a proliferation of the complex life-forms that established the foundation of life as it is today. Although dinosaurs are the most well-known fossil animals, trilobites are also a favorite among those familiar with Paleontology (the study of the development of life on Earth), and are found in the rocks of all continents.

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ANCIENT ARTHROPODS
Trilobites were among the early arthropods, a phylum of hard-shelled creatures with multiple body segments and jointed legs (although the legs, antennae and other finer structures of trilobites only rarely are preserved). They constitute an extinct class of arthropods, the Trilobita, made up of ten orders, over 150 families, about 5,000 genera, and over 20,000 described species. New species of trilobites are unearthed and described every year. This makes trilobites the single most diverse class of extinct organisms, and within the generalized body plan of trilobites there was a great deal of diversity of size and form. The smallest known trilobite species is under a millimeter long, while the largest include species from 30 to over 70 cm in length (roughly a foot to over two feet long!). With such a diversity of species and sizes, speculations on the ecology of trilobites includes planktonic, swimming, and crawling forms, and we can presume they filled a varied set of trophic (feeding) niches, although perhaps mostly as detritivores, predators, or scavengers. Most trilobites are about an inch long, and part of their appeal is that you can hold and examine an entire fossil animal and turn it about in your hand. Try that with your average dinosaur!

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Trilobite Order Galleries
Click on any of the (Order names)* below to be sent to a gallery featuring photos of trilobites in that Order

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agnostida	redlichiida	corynexochida	odontopleurida	lichida ​
phacopida	asaphida	proetida	harpetida	ptychopariida

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* - (adapted to table format with links on names instead of pictures) Wrong. Note: "... ten orders, over 150 families, about 5,000 genera, and over 20,000 described species. New species of trilobites are unearthed and described every year. This makes trilobites the single most diverse class of extinct organisms, and within the generalized body plan of trilobites there was a great deal of diversity of size and form. ..."Some were bottom feeders others were swimmers. Some ate vegetation, some preyed on other organisms. And wrong again.

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The coelacanths ... constitute a now rare order of fish that includes two extant species in the genus Latimeria: the West Indian Ocean coelacanth (Latimeria chalumnae) primarily found near the Comoro Islands off the east coast of Africa and the Indonesian coelacanth (Latimeria menadoensis).[2] They follow the oldest known living lineage of Sarcopterygii (lobe-finned fish and tetrapods), which means they are more closely related to lungfish, reptiles, and mammals than to the common ray-finned fishes. They are found along the coastlines of the Indian Ocean and Indonesia.[3][4] Since there are only two species of coelacanth and both are threatened, it is the most endangered order of animals in the world. The West Indian Ocean coelacanth is a critically endangered species.

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Coelacanths belong to the subclass Actinistia, a group of lobed-finned fish related to lungfish and certain extinct Devonian fish such as osteolepiforms, porolepiforms, rhizodonts, and Panderichthys.[5] Coelacanths were thought to have become extinct in the Late Cretaceous, around 66 million years ago, but were rediscovered in 1938 off the coast of South Africa.[6][7]

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The coelacanth was long considered a "living fossil" because it was believed to be the sole remaining member of a taxon otherwise known only from fossils, with no close relations alive,[5] and to have evolved into roughly its current form approximately 400 million years ago.[1] However, several recent studies have shown that coelacanth body shapes are much more diverse than previously thought.[8][9][10]

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Another important discovery made from the genome sequencing, is that the coelacanths are still evolving today (but at a relatively slow rate). This contradicts the earlier thought that these creatures were "living fossils." What this means is that they were thought to be a prehistoric species that has remained unchanged over millions of years. With the discovery of their evolution, "living fossil" no longer seems like an appropriate term to describe these unique creatures.[34]

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Reasons for such slow evolution by the coelacanths could be the lack of evolutionary pressure on these organisms. They have few predators, and they live deep in the Indian Ocean where conditions are said to be very stable. Without much pressure for these organisms to adapt to survive, the rate at which they need to evolve is much slower in comparison to other organisms.[34]

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Taxonomy

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The following is a classification of known coelacanth genera and families:[5][10][26][35][36][37][38]

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• Order Coelacanthiformes
  • Family Whiteiidae (Triassic)
    • Piveteauia
    • Whiteia
  • Family Rebellatricidae (Triassic)
    • Rebellatrix
  • Family Coelacanthidae (Permian to Jurassic)
    • Axelia
    • Coelacanthus
    • Ticinepomis
    • Wimania
• Suborder Latimerioidei
  • Family Mawsoniidae (Triassic to Jurassic)
    • Alcoveria
    • Axelrodichthys
    • Chinlea
    • Diplurus
    • Garnbergia
    • Mawsonia
    • Parnaibaia
  • Family Latimeriidae L. S. Berg, 1940 (Triassic to Holocene)
    • Holophagus
    • Latimeria J. L. B. Smith, 1939
      • Latimeria chalumnae J. L. B. Smith, 1939 (West Indian Ocean coelacanth)
      • Latimeria menadoensis Pouyaud, Wirjoatmodjo, Rachmatika, Tjakrawidjaja, Hadiaty & Hadie, 1999 (Indonesian coelacanth)
    • Libys
    • Macropoma
    • Macropomoides
    • Megacoelacanthus
    • Swenzia
    • Undina

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While not as numerous and diverse as the trilobites, they still show "more we see any creature microevolving in a few observable years in current time."Ignorance is no refutation of the real world facts.Enjoy(copied from The TRVE history of the Flood... Message 1090)

And what I know about geology and genetics I learned here. It is a learning environment ... for those who want to learn.Continuing with the trilobites we can look at when they became extinct:

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Final extinction

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Exactly why the trilobites became extinct is not clear; with repeated extinction events (often followed by apparent recovery) throughout the trilobite fossil record, a combination of causes is likely. After the extinction event at the end of the Devonian period, what trilobite diversity remained was bottlenecked into the order Proetida. Decreasing diversity[29] of genera limited to shallow-water shelf habitats, coupled with a drastic lowering of sea level (regression) meant that the final decline of trilobites happened shortly before the end of the Permian mass extinction event.[21] With so many marine species involved in the Permian extinction, the end of nearly 300 million successful years for the trilobite would not have been unexpected at the time.[29]

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The closest known extant relatives of trilobites are the horseshoe crabs,[9].

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So now, adding to the problems of fossil sorting for the creationists is the Horseshoe crab (Coelacanths are not the only "living fossils" in the sea). Horseshoe crabs have been around for 450 million years, and they are the blue bloods of the ocean ... because their blood is literally blue.

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Horseshoe crabs are marine arthropods of the family Limulidae and order Xiphosura or Xiphosurida. They are invertebrates, meaning that they lack a spine. Horseshoe crabs live primarily in and around shallow ocean waters on soft sandy or muddy bottoms. They occasionally come onto shore to mate. They are commonly used as bait and in fertilizer. In recent years, population declines have occurred as a consequence of coastal habitat destruction in Japan and overharvesting along the east coast of North America. Tetrodotoxin may be present in the roe of species inhabiting the waters of Thailand.[2]

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Because of their origin 450 million years ago, horseshoe crabs are considered living fossils.[3]

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Horseshoe crabs superficially resemble crustaceans. They belong to a separate subphylum, Chelicerata, and are closely related to arachnids.[4] The earliest horseshoe crab fossils are found in strata from the late Ordovician period, roughly 450 million years ago.

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The Limulidae are the only recent family of the order Xiphosura, and contains all four living species of horseshoe crabs:[1]

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• Carcinoscorpius rotundicauda, the mangrove horseshoe crab, found in Southeast Asia
• Limulus polyphemus, the Atlantic horseshoe crab, found along the American Atlantic coast and in the Gulf of Mexico
• Tachypleus gigas, found in Southeast and East Asia
• Tachypleus tridentatus, found in Southeast and East Asia

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Unlike vertebrates, horseshoe crabs do not have hemoglobin in their blood, but instead use hemocyanin to carry oxygen. Because of the copper present in hemocyanin, their blood is blue. Their blood contains amebocytes, which play a similar role to the white blood cells of vertebrates in defending the organism against pathogens. Amebocytes from the blood of L. polyphemus are used to make Limulus amebocyte lysate, which is used for the detection of bacterial endotoxins in medical applications.[17] ...

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Now the trilobites became extinct nearly 300 million years ago, so there was a period of overlap with the Horseshoe crab of about 120 million years.So combining trilobites and horseshoe crabs we have a continuous span of marine life from the lower (early) cambrian to the present day. Each species is associated with specific time periods that are defined by both relative dating (the law of superposition) and by absolute radiometric dating. Early horse shoe crabs can be found in the same strata as late trilobites, but early trilobites are not found in the same strata as late Horseshoe crabs, and the strata they are found in are always associated with specific radioactive isotope levels that follow the pattern of the relative dating of the layers.There was no mixing of the layers. Based on the levels of radioactive isotopes extant in the layers, each layer took centuries to form.There was no sorting of the fossils. They all lived and died during the periods that the layers were growing by the gradual accretion of sediments and the detritus of marine life on the ocean floors.The fossils show it by the way they are found in the sediments along with evidence of mature marine living ecosystems, and the radioactive isotopes show it by the different levels they are measured at for the different layers.The obvious conclusion is that none of these layers were disturbed, or in any way affected, by a purported global flood.When these fossils are found on mountains, it is because of tectonic activity pushing plates together and forcing one plate over another, piling it up ... in a process that is observed to day in the continued rise of the alps and the rocky mountains.Floods don't move tectonic plates and floods don't create mountains -- they erode them.EnjoyEdited by RAZD, : .

And this magic carpet flying flood carried whole ecosystems of living marine life complete with built-up accretion of silts and detritus of previous generations used as substrates to grow on, carried them intact with all the evidence of a continuous flow of lives one on top of the other, undisturbed ... brachiopods with their fragile stems still attached to shells of previous brachiopods ... ... with those piled up intact accumulation of mature marine ecosystems that showed generations of growth on top of generations of growth ... sorted by organism/species type, sorted by radioactive isotope levels ... ... that you totally made up out of thin air like all your other "explanations" and "proofs" ... ... oops, there you go making the flood move those tectonic plates, and presumably cooling them from overheating due to the massive friction fast-track movement makes ... with the animals already off the ark so they can be sorted onto the appropriate continents to sort their fossils geographically as they rapidly evolved before they got buried by the sediments ... Gosh, they are related! Well you're "evidence against the ToE" is a straw man because you don't understand why continual variation and adaptation actually shows evolution in an ecological environment that doesn't change that much. You only think so because that fits your beliefs, while you ignore the details of the evidence ... as always.Organisms don't need to evolve significantly if they are well suited to their ecology or are adaptable to different ecologies, but they still evolve via little changes and permutations. It's the little details that show continual evolution.The ones living today are also completely different species from the ones in the fossil record, and are only small handful of species compared to the large diversified numbers of species in the fossil record ... if you ignore the details that do show a lengthy fossil history and plenty of evidence of evolution ... Where curiously we do have fossils of transitions, including the clear transition from reptile jaw made from three bones through intermediate forms of therapsids (Probainognathus and Diarthrognathus for example) with two jaw hinges and then to a mammal jaw made of one of the reptile jaw bones while the other two are adapted to form part of the mammal ear -- the same bones the reptiles used while part of their jaw to transmit sounds to their single ear bone that makes up the third bone in the mammal ear -- and at the same time with teeth becoming differentiated into typical mammal teeth from the typical reptilian teeth.But this is not relevant to this thread about Trilobites, Mountains and Marine Deposits, so it should be discussed on another thread. You mean within nested clades, as expected by the theory of evolution, taking into account their ecological conditions. Species after species, the ones today are not the ones from yesterday, they are descendants, evolved descendants, and they are proof that there was no flood, or at least that they were completely unaffected by the magic flying carpet flood and massive terraforming activity you use to attempt to explain the geology.Everything arranged and magically sorted to imitate old age intentionally ... the big joke of the joker god/s ...And you still cannot explain the radioactive isotope levels sorted with the fossils as if they were the remnants of long ages of decay, magically sorted by the magic carpet flying flood.EnjoyEdited by RAZD, : .

Again with the typical ignorant creationist thinking.Trilobite is not a species, it is a subphylum with 10 orders and over 20,000 known species divided into different genera and families in those orders. There are no living trilobites.Coelacanth is not a species, it is an order with 7 families and many genera:

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Timeline of genera

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And Horseshoe crab is not a species.

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Taxonomy

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Order Synziphosurida
family Weinberginidae
family Bunodidae
family Pseudoniscidae
family Kasibelinuridae

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Order Xiphosurida
superfamily Bellinuroidea (including Euproopacea)
family Bellinuridae
family Euproopidae
family Elleriidae

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superfamily unspecified
family Rolfeiidae

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superfamily Limuloidea
family Paleolimulidae
family Moravuridae
family "Valloisellidae"
family Austrolimulidae
family Heterolimulidae
family Limulidae

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Order Synziphosurida (Basal Xiphosura)

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Silurian to Early Devonian.

Cyamocephalus loganensis Currie 1927 Length about 5 cm - family Pseudoniscidae Late Llandovery or possibly early Wenlock, Silurian period, Scotland (Euramerica)

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Yessiree that image looks just exactly like the modern horseshoe crab ... hardly changed at all.Yep there are only a few "living fossils" so evolution must be false if it doesn't force species to evolve more ...

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Living Fossil

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A living fossil is an extant taxon that closely resembles organisms otherwise known only from the fossil record. As a rule, to be considered a living fossil, the fossil species must be old relative to the time of origin of the extant clade. Living fossils commonly are species-poor lineages, but that is not a necessary condition. The term living fossil is not formally defined, but in scientific literature commonly appears to imply a bradytelic group, one tending to a slow rate of evolution.[1]

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In the popular literature "living fossil" commonly embodies radical misunderstandings such as that the organism somehow has undergone no significant evolution since fossil times, with practically neither morphological nor molecular evolution, but scientific investigations have repeatedly discredited any such claims.[2][3][4][5]

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Living fossils are not expected to exhibit exceptionally low rates of molecular evolution, and some studies have shown that they do not.[19] For example, on tadpole shrimp (Triops), one article notes, "Our work shows that organisms with conservative body plans are constantly radiating, and presumably, adapting to novel conditions.... I would favor retiring the term ‘living fossil’ altogether, as it is generally misleading."[20]

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Examples

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Bacteria

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• Stromatolite, a layered structure created as sediment is trapped by shallow-water, oxygen-creating, blue-green bacteria

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Protists

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• The dinoflagellate Calciodinellum operosum.[11]
  
• The dinoflagellate Dapsilidinium pastielsii.[13]
  
• The dinoflagellate Posoniella tricarinelloides.[12]
  
• The coccolithophore Tergestiella adriatica.[28]

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Plants

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• Pteridophytes
  • Horsetails — Equisetum
  • Lycopodiums
  • Tree ferns
  • Moss
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• Gymnosperms
  • Agathis - Agathis in Australia and the Pacific including Almasiga trees in the Philippines
  • Araucaria araucana — the monkey puzzle tree (as well as other extant Araucaria species)
  • Cycads
  • Ginkgo tree (Ginkgoaceae)
  • Metasequoia — dawn redwood (Cupressaceae; related to Sequoia and Sequoiadendron)
  • Sciadopitys "Japanese umbrella pine"
  • Taiwania cryptomerioides — one of the largest tree species in Asia.
  • Wollemia tree (Araucariaceae — a borderline example, related to Agathis and Araucaria)[29][30]
  • Welwitschia
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• Angiosperms
  • Amborella — a plant from New Caledonia, possibly closest to base of the flowering plants
  • Trapa - water caltrops, seeds, and leaves of numerous extinct species are known all the way back to the Cretaceous.
  • Nelumbo - several species of lotus flower are known exclusively from fossils dating back to the Cretaceous.

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Fungi

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• Neolecta

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Animals

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• Vertebrates
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  • Mammals
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    • Aardvark (Orycteropus afer)
    • Amami rabbit (Pentalagus furnessi)[31]
      
    • Chevrotain (Tragulidae)[citation needed]
      
    • Elephant shrew (Macroscelidea)[citation needed]
      
    • Laotian rock rat (Laonastes aenigmamus)[citation needed]
      
    • Monito del monte (Dromiciops gliroides)
    • Monotremes (the platypus and echidna)
    • Mountain beaver (Aplodontia rufa)
    • Okapi (Okapia johnstoni)[32]
      
    • Opossums (Didelphidae)
    • Capybara (Hydrochoerus hydrochaeris)[citation needed]
      
    • Red panda (Ailurus fulgens)[33]
      
    • Solenodon (Solenodon cubanus and Solenodon paradoxus)
    • Shrew opossum (Caenolestidae)
    • False killer whale (Pseudorca crassidens)
    • Pygmy right whale (Caperea marginata)[34][35]
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  • Birds
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    • Pelicans (Pelecanus) — Morphology has been virtually unchanged since the Eocene, and is noted to have been even more conserved across the Cenozoic than that of crocodiles.[36]
      
    • Acanthisittidae (New Zealand "wrens") — 2 living species, a few more recently extinct. Distinct lineage of Passeriformes.
    • Broad-billed sapayoa (Sapayoa aenigma) — One living species. Distinct lineage of Tyranni.
    • Bearded reedling (Panurus biarmicus) — One living species. Distinct lineage of Passerida or Sylvioidea.
    • Coliiformes (mousebirds) — 6 living species in 2 genera. Distinct lineage of Neoaves.
    • Hoatzin (Ophisthocomus hoazin) — One living species. Distinct lineage of Neoaves.
    • Magpie goose (Anseranas semipalmata) — One living species. Distinct lineage of Anseriformes.
    • Seriema (Cariamidae) — 2 living species. Distinct lineage of Cariamae.
    • Tinamiformes (tinamous) 50 living species. Distinct lineage of Palaeognathae.
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  • Reptiles
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    • Alligator snapping turtle (Macrochelys temminckii)
    • Crocodilia (crocodiles, gavials, caimans and alligators)
    • Pig-nosed turtle (Carettochelys insculpta)
    • Snapping turtle (Chelydra serpentina)
    • Tuatara (Sphenodon punctatus and Sphenodon guntheri)
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  • Amphibians
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    • Giant salamanders (Cryptobranchus and Andrias)
    • Hula painted frog (Latonia nigriventer)[37]
      
    • Purple frog (Nasikabatrachus sahyadrensis)
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  • Jawless fish
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    • Hagfish (Myxinidae) Family
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  • Bony fish
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    • Arowana and arapaima (Osteoglossidae)
    • Bowfin (Amia calva)
    • Coelacanth (the lobed-finned Latimeria menadoensis and Latimeria chalumnae)
    • Gar (Lepisosteidae)
    • Queensland lungfish (Neoceratodus fosteri)
    • Sturgeons and paddlefish (Acipenseriformes)
    • Bichir (Polypteridae) family
    • Protanguilla palau
    • Mudskipper (Oxudercinae)
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  • Sharks
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    • Blind shark (Brachaelurus waddi)
    • Bullhead shark (Heterodontus sp.)
    • Elephant shark (Callorhinchus milii)
    • Frilled shark (Chlamydoselachus sp.)
    • Goblin shark (Mitsukurina owstoni)
    • Gulper shark (Centrophorus sp.)

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• Invertebrates
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  • Insects
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    • Mantophasmatodea (gladiators; a few living species)
    • Meropeidae (3 living species, 4 extinct)
    • Micromalthus debilis (a beetle)
    • Mymarommatid wasps (10 living species in genus Palaeomymar)
    • Nevrorthidae (3 species-poor genera)
    • Nothomyrmecia (known as the dinosaur ant)
    • Notiothauma reedi (a scorpionfly relative)
    • Orussidae (parasitic wood wasps; about 70 living species in 16 genera)
    • Peloridiidae (peloridiid bugs; fewer than 30 living species in 13 genera)
    • Sikhotealinia zhiltzovae (a jurodid beetle)
    • Syntexis libocedrii (Anaxyelidae cedar wood wasp)
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  • Crustaceans
    • Glypheoidea (2 living species: Neoglyphea inopinata and Laurentaeglyphea neocaledonica)
    • Stomatopods (mantis shrimp)
    • Triops cancriformis (also known as tadpole shrimp; a notostracan crustacean)
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  • Molluscs
    • Nautilina (e.g., Nautilus pompilius)
    • Vampyroteuthis infernalis — vampire squid
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  • Other invertebrates
    • Crinoids
    • Horseshoe crabs (only 4 living species of the class Xiphosura, family Limulidae: Limulus polyphemus, Tachypleus gigas, Tachypleus tridentatus, and Carcinoscorpius rotundicauda)
    • Lingula anatina (an inarticulate brachiopod)
    • Liphistiidae (trapdoor spiders)
    • Onychophorans (velvet worms)
    • Valdiviathyris quenstedti (a craniforman brachiopod)
    • Paleodictyon nodosum (unknown)

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All of these have a close appearing ancestor that can be found in the fossil record. They persist because they are successful at surviving and breeding, not because evolution is not happening.Of course that is only a small cross-section of the full diversity of life on earth ... and some of these have given birth to other lineages that aren't listed.ie -- how are trilobites and horseshoe crabs related if there was no evolution? Calling them a species is a lie when you are talking about orders ... so I changed it to typical creationist undefined {kind} for you.And which scientists call evolution, gradual evolution from generation to generation with all offspring being members of the parent population, forming a clade when they have daughter populations ... as has occurred for trilobites, coelacanths and horseshoe crabs ... And we can start another thread to deal with this falsehood or take it to Evolution of the Mammalian Jaw. It isn't relevant to this thread, unlike trilobites (and other marine growth like coelacanths and horseshoe crabs).EnjoyEdited by RAZD, : Evolution of the Mammalian JawEdited by RAZD, : i

Such an authority you are. But you just said all horseshoe crabs are trilobites and there are 4 living species of horseshoe crab.A real authority would have known this.Now they are related, but I don't know how closely.

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Cyamocephalus loganensis Currie 1927 Length about 5 cm - family Pseudoniscidae Late Llandovery or possibly early Wenlock, Silurian period, Scotland (Euramerica)

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Certainly the Cyamocephalus loganensis looks like it could be part modern horseshoe crab and part trilobite, as one would expect from a transitional stage, and it's about 2" long, but without knowing the underside and body bits it would be a little presumptuous to go on just a sketch of the top view.Oh wait, that is what you just did ...Enjoy

Why has the horseshoe crab survived so long with so little change -- a common YECKIE question ...

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The horseshoe crab is a very unique character! It is a very old organism that has been around sinc e the Ordovician period which was close to 500 million years ago! Many of the horseshoe crab's closest relatives such as the trilobites and the eurypterids have gone into extinction. So what makes this organism so special to have survived throughout millions of years without becoming extinct like the trilobites and other closely related arthropods during that time? Horseshoe crabs have been favored because they are known as ecological generalists, meaning that they can live in a wide variety of environments without too much inconvenience. What makes this organism so successful is that they are not fixed to one specific habitat. Horseshoe crabs can endure variations in temperature and salinity.

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Burrowing is an adaptation that multiple organisms have developed. The horseshoe crabs are one of the largest organisms that burrow in sandy environments so that it can lay its eggs in the sediment. This provides more protection for the eggs increasing their survival.

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Due to its flexibility with its environment, horseshoe crabs have been able to make the changes necessary to carry on through time!

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Capable of living in many different ecologies is a big advantage to survival, and it doesn't put pressure on the species to select for new traits in order to use those ecologies.Now I expect you are going to say that eurypterids are also trilobites ...

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Eurypterids (sea scorpions) are an extinct group of arthropods related to arachnids that include the largest known arthropods to have ever lived. They are members of the extinct order Eurypterida (Chelicerata); which is the most diverse Paleozoic chelicerate order in terms of species.[1] The name Eurypterida comes from the Greek words eury- (meaning "broad" or "wide") and pteron (meaning "wing").[2] This name was chosen due to the pair of wide swimming appendages on the first fossil eurypterids discovered. The largest, such as Jaekelopterus, reached 2.5 metres (8 ft 2 in) in length, but most species were less than 20 centimetres (8 in). They were formidable predators that thrived in warm shallow water, in both seas and lakes,[3] from the mid Ordovician to late Permian (470 to 248 million years ago).

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Eurypterid from Ernst Haeckel's Kunstformen der Natur (1904)

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Horseshoe crabs are closer to sea scorpions than trilobites as they are both members of the Subphylum Chelicerata while trilobites are in the Subphylum Trilobitomorpha. Curiously I'll take my information from scientists that actually study the critters in detail over an opinionated arm-chair creationist making wide-ass guesses based on minimal information, a person with no actual education in the field.Enjoy

Of course you don't see it, because you would have to admit that you are wrong if you could see it. Just like horseshoe crabs and trilobites have to be all one species or you would have to admit that you are wrong.That is your firmly held beliefs/opinions/fantasies interfering with your ability to understand.Enjoy

So I looked

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Horseshoe crabs, some of them anyway, do look quite a bit like trilobites. And I guess I'd think of them as I think of the other "living fossils" as evidence against the ToE because the changes they show are just variations within the Kind over hundreds of millions of years. Funny how the creatures that don't show such a lengthy fossil history, where there is no evidence of evolution that is, are assumed to have evolved from one thing into another, such as reptiles into mammals, whereas when there is actual evidence from one time period to another of the changes to a creature -- like trilobites, horseshoe crabs and coelecanths, the differences are obviously the expected changes within the Kind.

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Seems like I did misunderstand you.So now you don't have any relationship between them, and we still have the same sorting problem:Everything arranged and magically sorted to imitate old age intentionally ... the big joke of the joker god/s ... And you still cannot explain the radioactive isotope levels sorted with the fossils as if they were the remnants of long ages of decay, magically sorted by the magic carpet flying flood.Enjoy

The individual trilobites of the species as a group are found all over the world, the two different species edge is talking about are never found in the same layers, and they are always found with the older species below the younger species, as we expect from the relative dating of the layers and the evolution of newer species from the older species.The radioactive isotopes are also found in the same concentrations for the layers the trilobites from each species are found in and the lower layer concentrations show more decay than the higher layer -- another indication of relative age ... except this also gives us estimates of absolute ages, so we know significant time has passed between layers.You can't escape the details, Faith.Enjoy

You can't make up reality Faith.Different species of trilobites are found in the same digs, but at different elevations.

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Trilobites of the Wheeler Shale, Utah

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The U-Dig Quarry, west of Delta, Utah.

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Western Utah is one of the best-known Cambrian fossil localities in the world. The Wheeler Shale and Marjum Formation, strata of Middle Cambrian age, exhibit various exposures throughout the House Range and nearby mountain ranges west of the town of Delta, Utah. The Wheeler Shale is named for a major feature in the House Range, the Wheeler Amphitheater. The Wheeler Shale contains interbeds of shaley limestone, mudstone, and thin platy limestone. Much of the Wheeler Shale is not particularly fossiliferous, but certain layers contain abundant trilobites and other shelly fossils. The Wheeler Shale also is known for a diverse biota of soft-bodied fossils, including many of the same taxa found in the Burgess Shale.

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The most famous Wheeler Shale fossil is the trilobite Elrathia kingi; so common at some sites that specimens are commercially quarried and are made into novelty accessories, as well as sold to collectors and institutions all over the world. However, Elrathia is just one of about fifteen trilobite genera of the Wheeler Shale. Bathyuriscus fimbriatus is also relatively common at certain sites. Even more abundant are several species of agnostid trilobites, such a Peronopsis interstricta. These are typically less than a centimeter in length. Here are eight representative species of the Wheeler Shale:

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Elrathia kingi PTYCHOPARIIDA Family Alokistocaridae	Peronopsis interstricta AGNOSTIDA Family Peronopsidae	Modocia typicalis PTYCHOPARIIDA Family Marjumiidae	Asaphiscus wheeleri PTYCHOPARIIDA Family Asaphiscidae
Bolaspidella housensis PTYCHOPARIIDA Family Menomoniidae	Jenkinsonia varga PTYCHOPARIIDA Family Alokistocaridae	Modocia laevinucha PTYCHOPARIIDA Family Marjumiidae	Bathyuriscus fimbriatus CORYNEXOCHIDA Family Dolichometopidae

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It is notable that the trilobite fauna of the Wheeler Shale, being a Middle Cambrian locality, is dominated by Ptychopariida, Corynexochida, and Agnostida. In addition to trilobites, there were other species of arachnomorph (trilobite-like clade) arthropods such as Naraoia. These trilobite-like arthropods demonstrate that the group from which trilobites arose was itself successful and diverse, though being uncalcified, are only preserved under exceptional conditions, such as at exceptional lagersttten such as the Burgess Shale and Chengjiang. Because the Burgess Shale was the first lagersttte with such exceptional preservation, other sites with similar preservation are referred to as "Burgess Shale type" lagersttten. This level of preservation occurs only infrequently in the Wheeler Shale.

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It only took a simple google search to find this information, and this was the top of the list.

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Arachnomorpha is a subdivision or clade of Arthropoda, comprising the monophyletic group formed by the trilobites, other great appendage arthropods and trilobite-like families (Helmetiidae, Xandarellidae, Naraoiidae, Liwiidae, and Tegopeltidae), and a diverse sister clade including the chelicerates.[1][2] ...

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And there is a lot more to the fauna and flora found in the layers with trilobites, all showing mature marine ecosystems functioning for multiple generations.Enjoy

Irrelevant.Enjoy