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Author Topic:   Evolution. We Have The Fossils. We Win.
Meddle
Member (Idle past 1297 days)
Posts: 179
From: Scotland
Joined: 05-08-2006


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Message 708 of 2887 (828504)
02-20-2018 11:29 AM
Reply to: Message 702 by Faith
02-18-2018 6:23 PM


Re: A Fair Assessment
You have to account for how a diferent sedimentary rock got laid on top of that deeply buried one but at the moment you've got a deep accumulation of who knows what between them, the lower parts of which must also have turned to rock on top of your original buried landscape, of a dfferent sediment or mix of sediments I would suppose and yet your buried rock has to be straight and flat and look like one of those in the stratigraphic column. And all that material has to erode away down to the straight flat surface of that buried rock in order for the next sedimentary rock to sit on top of it with nothing in between. You really are not thinking at all. The question about the animals had to do with the fact that they couldn't live ON a bare rock and that would have to occur at some time in this process you are describing, it's a phase that can't be escaped and in that phase you can't account for the animal life. You really are not thinking at.all. No fair hearing at all as I said .
I keep reading this and similar descriptions you've posted in the past and have to ask how you view how geologists view geological layers are laid down? From reading this you seem to suggest that a block of sediment gets dumped, not sure how quickly but in the past your comments lead me to think it was all at once. Then this block of sediment was buried, turned to rock and then everything above that buried it (not sure what you view this material to be) is eroded down to the bare, newly formed rock layer where the animals live, waiting for the process to repeat. That is just how I read it, so feel free to correct where I've went wrong.
However, here's an alternative way of looking at it. Think of the laying down of sediment like turning the pages on a book, and as more pages are turned over it puts more weight on the pages below, causing the process of turning sediment to rock to work it's way up from the lowest pages. The top pages are always sediment and this is where animals live and die. The top page is the current environment, for example a river estuary, but as more pages turn over, the environment depicted on the top page may change, such as a sea transgression towards the spine of the book. But when we look at the book today we only see the edges of the pages, so that river estuary may be hundreds of pages sediment which formed sand stone, with hundreds of pages of mudstone on top as the shore regressed, then hundreds of pages of limestone as the page edges were far enough away from the shore that they were not muddied by run off from the land.
Of course lots of other things may have been going on at the same time. Volcanoes erupting or meteorite impacts would drop in material like book marks which can be dated, allowing us to say an upper and lower limit for when those pages were turned over. Each page has the potential for some of the organisms living on those pages to be preserved when they die and leave a fossil. Some of the fossils may only be found between certain bookmarks.
That's my take on it. A bit overly long and overly simplified, and not being a geologist I'm sure someone will point out where my assumptions are wrong, but here's hoping it helps you get an understanding of how others view these processes even if you don't necessarily agree with it.
Edited by Meddle, : No reason given.

This message is a reply to:
 Message 702 by Faith, posted 02-18-2018 6:23 PM Faith has replied

Replies to this message:
 Message 709 by Faith, posted 02-20-2018 12:00 PM Meddle has not replied

  
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