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Faith  Suspended Member (Idle past 1466 days) Posts: 35298 From: Nevada, USA Joined: |
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Author | Topic: Evidence that the Great Unconformity did not Form Before the Strata above it | ||||||||||||||||||||||||||||||||||||||||||||
herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined:
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nature is unreliable as a source of truth. Actually, they would say it is our interpretation of nature that is unreliable. Ironically, the Bible is much more difficult to interpret than nature because it can be so subjective and we need to try to get into the minds of people who lived many years ago. But, you are right. When the Bible is believed to be the only reliable source of truth, it makes it difficult to point out even simple scientific facts. HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined:
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1. The strata were already in place when the uplift occurred that created the mounded rise. Evidence for this is that the strata all follow the contour of the mound. OK, for the most part yes, this seems to be true. The forces that caused the Kaibab plateau uplift appear to be a fairly recent phenomenon and the sediment at least up to the Kalibab were in place before the uplift.
2. Whatever caused the rise lifted the whole stack of strata as a block. Evidence for this is that the rounded contour is at both the bottom and the top of the canyon: it rises over the Great Unconformity instead of the strata butting in to it, as they would if it was there before the strata were laid down. First of all, an unconformity represents a "missing" segment of time - which I understand you don't accept. I think you do understand what it means, but you worded the above kind of strangely saying that if the unconformity existed before the strata above it was laid down that it would butt into it (the unconformity). What we need to look at is the layers above and below the unconformity and see how they interact. But so far, you thought process is ok.
3. This means that the Great Unconformity was NOT there before the strata were laid down. It was lifted right along with the whole stack, and probably tilted at the same time. Now this is where your logic has failed. In order for the strata above and below the unconformity to be lifted along with the rest of the block, it needed to be there before the lift occurred. If you are trying to make the argument that the unconformity formed during the uplift, this line of reasoning doesn't do it. It doesn't even make sense, here's your logic: 1. The strata doesn't butt up against the unconformity2. The whole block was lifted as a unit 3. The unconformity wasn't there before it was lifted How does 3 follow from 1 and 2?
So I conclude that now I’ve finally proved that the Great Unconformity did NOT preexist the laying-down of the strata Well, let's look at the contact between the Supergroup and the Tapeats (which represents this Great Unconformity). First, here is a cross section
Note that the Tonto Group (the Tapeats being the lowest member) contacts the Vishnu Basement through the Sixtymile formation. Also note that the Tapeats DOES butt up against the Supergroup. Wikipedia say this of the contact between the Tapeats and the Supergroup
quote: One of the layers that is not identified in the above image is the Cardenas Basalts quote: It is 300m thick in some places! These lava flows (subaerial) make up some of the features that were resistant to weathering and formed these monadnock structures that protrude not just into the Tapeats but some even into the Bright Angle Shale!
quote: Unkar Group Here are a couple of pictures of the Great Unconformity
quote: quote: quote: OK, you get the point... the contact between the Tapeats and the Supergroup was there BEFORE uplift. A more likely order of events (simplified, of course): 1. Supergroup deposited2. Supergroup fractured and tilted 3. Surface which would become the Great Unconformity weathered 4. Paleozoic rocks deposited 5. Uplift of Kalibab plateau 6. Cutting of the Grand Canyon I think that order is pretty well universally accepted. Of course, some of the details and the timing are debated, but it should be absolutely clear that the unconformity did not form during uplift, the surface that would become the unconformity was there before both the uplift and the deposition of the Paleozoic strata.
There are of course many different reasons why the Geologists think the Great Unconformity was there long before the strata were laid down, but if what I've said above is true, it makes all the other reasons wrong. Those reasons being that they let the rocks tell the story not try to force a preconceived notion onto them. HBD Edited by herebedragons, : spellingWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined: |
Edge is now saying that the Supergroup is NOT composed of layers as you seem to be saying it is, and I thought it was. Didn't edge say the Great Unconformity was not composed of strata? Not the Supergroup??
Faith writes: ... that is, simply because it's beneath the Paleozoic system, that refers well enough to the strata the G.U. is composed of,
edge writes: The Great Unconformity is not composed of strata!!!!!!!!! From Message 91 HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined: |
All right, this needs a lot of clarification. The angular unconformity at Siccar Point is the entire formation that includes both the upper horizontal layer and the vertical layers beneath. This is how I've been regarding the physical presentation of the Great Unconformity as well. To reduce it merely to the eroded contact line makes no sense to me. In geological terms, an unconformity represents a period of missing time. If say you have a layer dated at 750 mya with a layer dated to 500 mya directly on top of it - in contact with it, then that is an unconformity - 250 million years of "missing time." But you don't detect an unconformity merely by determining there is "missing time" you look at the contact surface. So it IS the eroded contact line that represents the unconformity.
As for an unconformity representing a missing segment of time, aren't you confusing different kinds of unconformity? No, I don't think so. Different types of unconformities describe the different ways that the layers above and below the contact relate to each other. The Great Unconformity in the Grand Canyon is an Angular Unconformity because the lower layers are truncated (terminated) at the contact at an angle.
The kind I reject is the kind that represents an entire segment of rock that OE theory says is supposed to be there but isn't. An erosional surface has removed material, obviously that's how erosion works. So if the contact is an erosional surface, there is a segment of rock that is missing. It does not necessarily mean that there is an entire layer of rock missing. It could be a time where there was no deposition occurring. An unconformity does strongly suggest, however, that the layer was exposed at the surface - which usually results in erosion.
As for your proofs, they are very much the standard view, though maybe I'm not giving them enough attention at the moment. This is part of the "let the rocks tell the story" comment. Look back at what I presented regarding the contact between the Supergroup and the Tonto Group and ask "what does this tell me about what happened?" Forget about what you are trying to prove, or what you expect it to say, find out what it says!
Nevertheless, despite the presence of these dramatic pieces of rock, the overall presentation of the surface of the G.U. where it contacts the Tapeats, is still a lot more flat and horizontal than I would expect. But there is no reason to expect ANYTHING because you don't know what happened there. Your expectations come from having a preconceived notion about what happened. It also comes from ignoring the details and focusing only on the big picture. Yes, it is surprising that that surface is so flat. Yes it is surprising that the area did not experience major tectonic disturbance for long periods of time. But that is the story the rocks tell!
Accusing me of "forcing" anything is not fair. I do my best to understand the actual lay of the rocks and how it all fits together. You think that is what you are doing, but its not. You are trying to explain it in the context of a global flood, which is not necessarily wrong, but unless you are willing to give up trying to explain it with the flood, you have no choice but to "force" your observations to fit your preconceived notion. When you stop and say "what do the rocks actually say?", then you will be able to understand them. Who knows, maybe you will find that there was a global flood... HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined: |
Also, no avoidance going on, I simply believe there was only one major tectonic event that caused the Kaibab Uplift and all that massive erosion above the Permian, and the tilting of the Supergroup beneath the canyon. You don't still believe this do you??? After you have been shown that the Great Unconformity is an erosional surface?? That it has features that protrude up to 240m (800ft.) into the layers above??? That there are large Vishnu clasts that have been incorporated into the Tapeats at the point of contact??? Sure sounds like avoidance to me. (Unless you were merely pointing out what you WERE thinking before you were shown it could not have happened that way ) HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined: |
can we coin a new word for what we see here, Christian apologistics? I propose the term Christian apologistics as a field of Christian theology which attempts to present a multitude of irrational bases for the Christian faith, defending the faith against objections. No need to invent a new term, we already have one that fits this description... Creation Science. HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined:
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I'm giving up on this thread at this point. I've concluded I didn't have the OP thought out and don't have the evidence I thought I had. Thanks. Fair enough, but I suspect you have not given up on your belief regarding the formation of the Great Unconformity and the tilting of the Supergroup etc... You just realize you can't continue to argue it here. In 6 months or so, you will be trotting this whole idea out again, whether at EvC or at your blog or whatever, as if none of this discussion ever happened. I hope I am wrong about that... HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined: |
TAD writes: In their day and age, Martin Luther, John Calvin, Philipp Malanchthon, Bellermine and ALL the giants of Christianity believed and insisted that the earth sat unmoved and the heavens rotated around us. They declared those who disagreed to be apostate and even devil possessed. They claimed that if science and the bible contradicted, it wasn't the bible that was going to be altered because all science had to be measured against the bible. The verses proclaiming geocentricity were "divine evidence" and who has the authority to argue against the divine?
Faith writes: You really should provide some quotes in evidence for all that. I have provided you with quotes that are evidence of this (at least for Calvin and Luther) and wondered why you held beliefs (heliocentricism) that were contradictory to the Bible. You just dismissed it. So what would be the point of Thin Air providing quotes? HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined: |
It wasn't so much that she denied that they believed it, or that they had said those things but that there was any relevance to it.
The discussion was around here: Message 49 HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined: |
I think the whole problem has to do with treating the Bible's simple observations as if they were scientific. Amen!!!Whoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined:
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everything I've found calls it a metamorphic rock requiring heat and pressure Shinumo Quartzite quote: Have you given any more thought as to how the Shinumo Quartzite could protrude through the Tapeats and be overlain with Bright Angel Shale?
Shinumo Quartzite quote: Below is a photo of Cheops Pyramid marked up with the different strata present.
At first I wondered about the brown band at the top of the Shinumo Quartzite thinking it looked much like Tapeats Sandstone. However, the upper unit of the Shinumo is characterized as:
quote: And it has weathered almost identically as the formation below. The Tapeats would be much softer than the Shinumo and I would expect it to weather noticeably different. ABE: (I could be wrong about the Tapeats in this photo. It may actually be Isis Temple in the background where the Tapeats is missing - a little confirmation from someone else would help) Structures like this are really difficult to find adequate pictures to illustrate the phenomenon. As you can see, they are massive! We often need to rely on descriptions from people who have studied these up close. Edwin MacKee published "Cambrian History of the Grand Canyon Region" in 1945. Mac Kee has done extensive work studying the GC long before the internet. His books are difficult to come by, you have to go to a library in the dust, old books section. However, this book is available on Google Books as a free e-book. quote: Regarding the "Weathering of Ep-Algonkian Surface" (Ep-Algonkian surface is the name used for the surface that would become the Great Unconformity) MacKee summarizes the work of Robert Sharp (1940)
quote: Each of these points is strong indication that the Great Unconformity was once exposed to the surface prior to Paleozoic sediment deposition. If you have questions as to why they are problematic for continuous sedimentation, please ask and we can discuss further. Anyway, you are not likely to find a lot of details on these features on the web except as what you might call the "Old Earth Party Line." Edwin Mac Kee spent his whole career studying the Grand Canyon, analyzing it and writing about it. Details about WHY he came to his conclusions could be found in his books. Those that have studied the region close up and in detail have determined that the Great Unconformity is an erosional surface and not a slip fault (which is more like what it would be if the basement rocks rotated underneath the Paleozoic formations). HBD Edited by herebedragons, : subtitle Edited by herebedragons, : disclaimer Edited by herebedragons, : new link to imageWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined:
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So, on top of the basement metamorphics and intrusives the contact with the sedimentary strata is a nonconformity, but on top of the tilted Supergroup it's an angular unconformity? Is that the idea? 4 types of unconformities.
Keep in mind that the unconformity itself is the solid black line that represents a period where there was not continuous deposition. Also note, that it is interpreted to mean "missing time" but what it actually represents is a time when deposition was not continuous - in other words, deposition paused, with or with out subsequent erosion. (however, erosion is pretty much inevitable at the surface and the presence of an erosional surface would be an indication that an unconformity exists). So there is actually no "missing time" but simple no deposition. Does that help clear things up? Also note that there is nothing in that definition that defines long periods of time. Deposition could have paused for 1 minute between flood waves or 1 million years during an uplift. To determine time frames we would need to look at processes. But I suggest that we just focus on determining IF the Great Unconformity is really an unconformity or is it something else. HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined:
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The term 'quartzite' is often used loosely, but if you want to be precise... Something else that needs to be clarified... terms like quartzite, granite, sandstone, etc. are general categories for rock classification. Its like the terms fish, insect, mammal, etc. in biology (well maybe not quite that broad, but close). They are classified because they have certain characteristics in common, but there can be considerable variation in their actual make up. For example, here is the description of the Tapeats Sandstone from the USGS. It is much more than just "sandstone."
quote: Quartzite is kind of a strange category, there can be metamorphic quartzite and unmetamorphic quartzite. I think that makes the terminology confusing and it is understandable why Faith thought the Shinumo Quartzite was metamorphic. Geologists HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined:
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Another thing to point out real quick.
In Message 211 I quote a description of the Tapeats sandstone from the USGS. Here it is again.
quote: I bolded a section in that description that describes how the Tapeats blends into the Bright Angel Shale and both materials are found in nearly equal proportions. Contrast this upper contact to the lower contact with the Vishnu and/or the Supergroup. HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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herebedragons Member (Idle past 879 days) Posts: 1517 From: Michigan Joined: |
I understand your concern here. We have been over this before and without arguing over what "flat" means again, let me ask you a question...
Can you think of an example in our contemporary setting where the surface of the earth that is exposed to erosion is "flat?" Remember that image that we went round and round about in the other thread (the one where you said it looks like the rock were lifted out of the Vishnu)? Remember how you said it doesn't look like it had even been subjected to erosion? And I pointed out that even though it may not "look like" it had been eroded, we knew for sure it was eroded. Sometimes our expectations of what geological features should "look like" is pretty subjective. HBDWhoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca "Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem. Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.
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