Been a pretty busy past few days. I was preaching at a church this morning so I had to spend some time getting prepared for that. Hopefully I'll have some more free time to get back to this thread now.
One comment first before addressing the issues.
The flood dynamics would've been quite complicated with all sorts of factors involved - plate movement, crustal erosion, climate change, tidal forces, wind, rain, etc. Since we were not there and that there's been little research into this area, it would be hard to give any specifics of exactly what happened during the flood.
micatala wrote:Hakatai Shale: Precambrian. Stromatolite fossils which are formed from mats of bacteria in a marine environment.
Just to add that Stromatolite fossils are not limited to the Precambrian.
"Most often, stromatolites appear as variously-sized arches, spheres, or domes. Learn to recognize the characteristic, alternating layers and you'll begin to see stromatolites everywhere in marine sedimentary rocks. (note here that stromatolites can be found in other, much more recent rocks, like the Cretaceous rocks that surround Vesey Elementary school on Tucson's west side.)"
Stromatolites even
exist today. So, the existence of stromatolites by themselves do not indicate age.
micatala wrote:
The Tonto Group of the Cambrian, including three sublayers referred to as the Tapeats Sandstone, Bright Angel Shale and Muave limestone. Note that sandstone, shale, and limestone all form in different ways. HOw the FM can explain this layering I am not sure.
I touched on layering
here.
Layers would be accounted for by different sediments being deposited at different times and from different locations and also by tidal forces.
otseng wrote:Sorting and layering was significantly affected by lunar tidal forces. Roughly twice a day, it would experience two cycles of tidal forces. The sediments under water were cycled with high pressure and low pressure during high and low tides. Also, the energy of tidal waves are now dissipated by the coast lines, but when the water covered the entire Earth, there were no coast lines to absorb the waves. These forces would account for similar sediments to be sorted together and account for rythmic layering.
micatala wrote:Shale forms only in water that is tranquil for long periods of time.
The process in the rock cycle which forms shale is compaction. The fine particles that compose shale can remain suspended in water long after the larger and denser particles of sand have deposited. Shales are typically deposited in very slow moving water and are often found in lakes and lagoonal deposits, in river deltas, on floodplains and offshore from beach sands. They can also be deposited on the continental shelf, in relatively deep, quiet water.
Though it says that shale can form in tranquil waters, it doesn't state that it can
only form in tranquil waters.
micatala wrote:Above this in the Temple Butte Formation we are in the Devonian period.
Fossils include placoderms, stromatoporoids, and rugose corals. How did the corals get above the more mobile trilobites?
This is assuming that corals and trilobites live in the same place. If they did not live in the same place, then the corals could have been transported and buried above the trilobites.
Brachiopods, like corals, are immobile. How did these get above the trilobites if these layers were laid down in a flood?
Same thing. If they were from a different location, they would not be buried together.
micatala wrote:There are plant fossils as well as some amphibians and reptiles.
A clarification. No skeletal remains of amphibians or reptiles are found. The only fossils are footprints, which could be either from reptiles or amphibians.
IN addition, there are raindrop prints and mudcracks which indicate that these layers were at least at times exposed to the air!
Yes, it would have been exposted to air if they are indeed raindrop prints. And same goes for footprints.
The global flood would not have been one event where a bunch of dirt was dumped on the Earth simultaneously. But, it would've been a complex event where there were possibly waves of deposits placed at different points in time.
Certainly animals cannot "run" when they are buried in dirt. And raindrops cannot form fossil imprints if they are not exposed to the air. So, when we see layers of footprints, it would mean that the flood had a brief point where sediments were not being deposited and the layer was exposed to air. In either the SG or FM, the sediments must've been wet to be able to form footprints. And for raindrop imprints, this is even more the case. And then these prints must've been quickly buried before they eroded away.
micatala wrote:How did this non-marine environment get laid down on top of the marine environments with the trilobites, corals, brachiopods, etc if all these layers are due to a single flood?
They were from a different location.
This can be seen in the
Supai Formation:
"Numerous fossils of amphibians, reptiles and terrestial plants exist in the eastern portion which are replaced by marine fossils as you move westward."
Coconino Sandstone: 300 feet thick from the Permian period (290 to 248 MYA). This formation is composed of nearly pure quarz sand, well-rounded and formed into cross-bedded layers characteristic of sand dunes.
Or possibly underwater sand. If it was a desert condition, how can footprints become fossilized? First, how can sand capture and retain animal footprints? And even if it somehow can, why do we see a small number of footprints? Also, the footprints are easily recognizable. How can such footprints become fossilized in dry sand?
In the FM, it would've been a quick sequence of layer(s) deposited, an animal ran across the wet sand, then it was quickly buried by more sediment.
Some questions from me:
The Earth was formed approximately 5 billion years ago.
The roots of the ancient mountain range that now lies at the bottom of the Grand Canyon were formed about 1.7 billion years ago.
What happened to that mountain range? If it got eroded, where did the sediments from the mountain range go?
There is then an unconformity of about 450 million year in which the rocks are missing.
What happened during the 450 million year period? How could nothing have happened during this time?
At 1.25 billion years ago the first sedimentary layer, the Bass Formation, was laid down.
Why are there not sedimentary layers older than 1.25 billion years old? If the Earth formed 5 billion years ago, didn't it rain since that time? If there was a mountain range 1.7 billion years ago that got eroded, shouldn't the sediments from that massive erosion have formed sedimentary layers?
At 1.2 billion years ago the sea retreated leaving mud flats behind which eventually became the Hakatai Shale.
Where did all these sediments come from to form this layer? Why was it completely flat? Where are all subsequent layers also flat? And where did those sediments come from?
There is then another unconformity of about 250 million years in which new rock layers were probably laid down but were completely eroded away.
Where did it get eroded to? If it got eroded, how did it get eroded to become completely flat? If we see erosion in the area now (or practically anywhere else in the world), areas do not get eroded flat for hundreds of square miles in area.
The thick layer of Redwall Limestone which began to deposited around 330 million years ago indicates that the land was submerged for a great deal of time.
How did the land get submerged? Did the ocean rise or did the land fall? What caused this?
The Supai Group which rests atop the Redwall is dated at 300 million years ago and indicates that it was formed in an above water and coastal environment.
How did the land rise above sea level? What caused this?
The Coconino Sandstone represents the remains of a vast sea of sand dunes which was blown down from the north around 270 million years ago.
Again, if it was sand on dry land, how could footprints have been captured? And why only a few set of footprints?
The top layer of the Grand Canyon, the Kaibab Limestone, contains many marine fossils which indicate that it originated at the bottom of the sea. This layer is around 250 million years old.
How did the land submerge again? Why would the top most layer be 250 million years old? Why are there not more recent layers on top of this?
As a final comment, the thread is partly about which model explains the data better. The SG is certainly quite consistent with all we find in the grand canyon. The FM simply is not.
I will say this. I do not think either the SG or the FM can fully account for everything. As for which one explains more, I have a different opinion.