|
Register | Sign In |
|
QuickSearch
Thread ▼ Details |
|
Thread Info
|
|
|
Author | Topic: Dating in Hawaii | |||||||||||||||||||||||||||
Harlequin Inactive Member |
Has anyone seen a physical map of the Earth as it would look like if the water was removed? One of the striking features of such a map is Hawaii. First is the Biggest island (Hawaii), then some smaller big islands. Then some smaller islands. Then a series of rather small islands and many, many underwater mountains in a line going on for thousands of miles.
Source: The long trail of the Hawaiian hotspot Now everyone should know that features on the earth are moving slowly with respect to each other. It used to be known for completely compelling theoretical considerations, but now these motions can be measured directly with GPS equipment. Plate tectonic theory tells us that there is a hot spot under the ocean floor. As the section of the crust of the earth (a plate) move with respect to this hot spot. Volcanoes form large islands over the hot spot. When island moves away from the hot spot, its volcano dies, and erosion starts to erode the island away. So behind Hawaii, there is a long string of long extinct volcanoes which for the most part no longer rise above the oceans surface. If K-Ar dating is not full of beans (and can be properly applied to this case), we would expect that the farther away one gets from the big island, the older the volcanoes (and extinct volcanoes) will be according to K-Ar. Well here are the results (Kilauea is one of the volcanoes on the big island): Source: The Formation of the Hawaiian Islands Do note that the rate of motion of the plates implied by the above image is consistent with the measured rate of motion of Hawaii.
|
|||||||||||||||||||||||||||
AdminAsgara Administrator (Idle past 2333 days) Posts: 2073 From: The Universe Joined: |
Thread moved here from the Proposed New Topics forum.
|
|||||||||||||||||||||||||||
RAZD Member (Idle past 1436 days) Posts: 20714 From: the other end of the sidewalk Joined: |
Good post. I was worried that I would find advice on what kinds of lei to wear at different events ....
We will see if anyone bites, the QUESTION for the YEC crowd especially is to explain (1) the linear formation of the islands and (2) the correlation of distance with K-Ar dating. Specifically the question is how does one {explain\conceive} any arrangement that produces both results with that degree of precision. Good luck. we are limited in our ability to understand by our ability to understand RebelAAmerican.Zen[Deist
{{{Buddha walks off laughing with joy}}}
|
|||||||||||||||||||||||||||
roxrkool Member (Idle past 1020 days) Posts: 1497 From: Nevada Joined: |
RAZD writes:
Migration of a plume? Specifically the question is how does one {explain\conceive} any arrangement that produces both results with that degree of precision. Or eruption of magmatic material along a propagating fracture in the ocean crust?? Actually, those are not YEC theories, but mainstream theories. I figured some YEC would bring them up 'forgetting' the fact that they are not YEC theories.
|
|||||||||||||||||||||||||||
Loudmouth Inactive Member |
Great post Harlequin. I also started a post on this very topic a while back (YEC Challenge: Hawaiian Islands).
In addition to the horizontal movement of the plate, the islands are also subsiding. In fact, seamounts thousands of kilometers away from the Big Island have submerged coral reefs. These reefs can be 50 meters underwater. Coral, if it is to survive, can only be in 1-2 meters of water. The depth of these dead coral reefs also correlates with the measured subsidence of the Hawaiian islands.
|
|||||||||||||||||||||||||||
RAZD Member (Idle past 1436 days) Posts: 20714 From: the other end of the sidewalk Joined: |
google on {new deep coral reef}
http://www.ecology.com/...3/articles/6-2003/6-17-03/reef.htm note that it is a different kind of coral, but ... This message has been edited by RAZD, 01-07-2005 21:34 AM
|
|||||||||||||||||||||||||||
TrueCreation Inactive Member |
quote:
|
|||||||||||||||||||||||||||
RAZD Member (Idle past 1436 days) Posts: 20714 From: the other end of the sidewalk Joined: |
reef corals (best known type) are a symbiotic relationship and need sunlight for the photosynthesis. too deep and no sunlight.
see http://www.coris.noaa.gov/about/biology/biology.html see also link to deep water corals. we are limited in our ability to understand by our ability to understand RebelAAmerican.Zen[Deist
{{{Buddha walks off laughing with joy}}}
|
|||||||||||||||||||||||||||
TrueCreation Inactive Member |
RAZD,
Of course. However, my expression was due to Loudmouth's numbers (1-2 meters). It is my understanding that the survival of all reef building species of coral is dependent on the depth of light penetration because they are all hermatypic. The depth of significant light penetration is more along the lines of <90 1974]). Barnes, Betty; Invertebrate Zoology; 1974, pg. 132
|
|||||||||||||||||||||||||||
jar Member (Idle past 425 days) Posts: 34026 From: Texas!! Joined: |
Would you say though that something on the order of 200 meters would be a reasonable limit?
Aslan is not a Tame Lion
|
|||||||||||||||||||||||||||
TrueCreation Inactive Member |
--Right. However it was my understanding that reef building corals are restricted to the depth of light penetration because they are hermatypic. While most species are restricted to 15m depths, some species can persist to depths of up to at least 90m depths where radient energy is ~1/50th that at the surface (Barnes, 1974).
--Not exactly the 1-2m value Loudmouth gave. Barnes, Betty; Invertebrate Zoology; 1974, pg. 130-132
|
|||||||||||||||||||||||||||
RAZD Member (Idle past 1436 days) Posts: 20714 From: the other end of the sidewalk Joined: |
yes. I thought that loudmouth was perhaps a little careless with the numbers, or the species specific relationships (some more some less susceptible?)
the point however is that structure is observed around the subsided sea mounts that was built by light using coral animals and which are now dead due to the depths of subsistence. we are limited in our ability to understand by our ability to understand RebelAAmerican.Zen[Deist
{{{Buddha walks off laughing with joy}}}
|
|||||||||||||||||||||||||||
Coragyps Member (Idle past 765 days) Posts: 5553 From: Snyder, Texas, USA Joined: |
In fact, seamounts thousands of kilometers away from the Big Island have submerged coral reefs. These reefs can be 50 meters underwater.
They can be 1200 to 1500 meters below the surface. Google "guyot."
|
|||||||||||||||||||||||||||
TrueCreation Inactive Member |
quote:--Oh well. Happens to most of us. quote:--indeed. The existance and structure of guyots is more of a problem to YEC geology than arguments regarding the dating of island chains and seamounts such as the Hawaiian chain and Emperor seamounts, IMO.
|
|||||||||||||||||||||||||||
Loudmouth Inactive Member |
Thank you all for the corrections on coral depth. Marine biology is not my strong suit, so thanks for showing the errors of my ways.
What I should have said is that the SPECIES of coral skeletons found in deep water on these seamounts is consistent with gradual subsidence. In addition, U/Th dating of the coral correlates with this gradual subsidence (and against a young earth). Is that better?
|
|
|
Do Nothing Button
Copyright 2001-2023 by EvC Forum, All Rights Reserved
Version 4.2
Innovative software from Qwixotic © 2024