otseng wrote:First off, thanks for the first thoughtful response to my prediction.
micatala wrote:
I would think, however, that at a given location, sedimentary strata could be either very thick or somewhat thin, and could represent varying periods of time.
Yes. And even in some places, there are
no sedimentary strata.
I agree this could happen and is consistent with the SG model. It would seem to me to be inconsistent with the flood model.
Does anyone know of a location where there are no sedimentary strata?
otseng wrote:micatala wrote:I could see that at a given location, sedimentary strata could be formed during era A, then no strata are formed for a time (perhaps a long time), then either more strata are formed on top of these or uplifting occurs at this location for a period, then erosion might occur, etc.
During the long period after A was deposited, couldn't
something have happened to it? Like folding, erosion, faults, etc?
Sure. I don't see how we can rule out a number of sedimentary layers forming and then later undergoing faulting, folding or erosion. My understanding would be that erosion is not likely to occur unless the strata are at or close to the surface. Faults could happen to surface or buried strata. Folding I think would have to happen when the strata are buried and under pressure or heating. Folding or faulting could cause strata that are buried to rise to the surface or closer to the surface.
Also, I would think that in some cases, a thick (or maybe even a thin) layer could be layed down quickly, although it might take some additional time to harden.
Which raises another question. It would be assumed that when any layer is formed, it would not be hardened immediately. So, water and wind should be able to erode it and be recorded in the geologic record.
This would seem to be a fair point.
So could an ordinary water flood.
Or even an extraordinary water flood.
Of course. To distinguish, we would have to investigate the extent of the effect. For a global flood, it seems to me we should be able to trace the "flood layer" all over the world.
Not to digress, but how thick would this hypothetical flood layer be?
otseng wrote:Assuming there were no additional sedimentation (or other types of layers) layed down after a flood and subsquent deformation, it seems to me the flood model prediction is reasonable. I guess I need clarification on what this model assumes is below the strata layed down by the global flood, and whether this model includes subsequent layers being layed down years after the flood.
There would be no significant sedimentary layers deposited prior to the flood.
After the flood, there could be some additional layers deposited by volcanoes, local floods, or river sediments. But it would not be extensive.
OK. So if I am understanding your model correctly, we should have a world wide layer of igneous or metamorphic rock underlying everything, then a flood layer, then a small number of other layers might occur at locations around the world and these could be sedimentary or igneous.
Is it fair to say we should not see any igneous rocks
within the flood layer.
I am not sure I would expect a "uniform" distribution in the stratas.
I wouldn't say uniform at any single location, but taking all locations around the world, I would expect if erosion, faults, folding occurred in the past, each location would be a snapshot of the history of that particular location, and they should all have past events evident in the stratas. There should be no reason that erosion, faults, folds should only be seen to affect all the layers at almost all places.
I am having some trouble parsing this, but if I am understanding correctly, you are essentially saying that, under the SG model, any given location can show a wide variation in its geologic history. We should NOT see instances of erosion, faults, and folds that affect the entire world at the same time. Do I have that right?
To the extent that strata tend to form in flat areas, and especially marine environments like continental shelves, I would expect that these areas tend to be very quiet, seismically speaking, during periods where strata are forming.
I would question that assumption. But even if it is quiet while a particular strata is forming, there is a large amount of time between when stratas form.
The assumption is only one of tendency. I would not claim that you could not have seismic activity at places where sedimentary strata are forming.
I am unsure how much time you need between layers. I think it would depend on the particular minerals involved, the amount of water (if water was involved) etc.
Conversely, I would expect that in most areas where folding/faulting/erosion are occurring, sedimentary strata are not being layed down at the same time.
In a concave (synform) fold, I would actually expect it catch more sediments than a flat surface.
Most mountains are the result of folding, but they also have a significant amount of deposits in them.
Fair enough.
Now, over the long history of the earth, while I wouldn't expect "uniformity", I would expect to see instances of sedimentary layers subsequently undergoing folding, and faulting and this, I would think, would effect all they layers existing at the time the folding or faulting process was occurring.
Yes. But would this mean that once a fault occurs that the location could not have more layers deposited on it?
I wouldn't say it is impossible. I would say that it seems less likely that a place that had significant faulting would then have layers forming over the whole area as, to the extent that layers form in flat areas, faulting might make the area no longer flat.
However, given your point above about sediments forming in mountain folds, I think what I was saying applies really only to areas where flat horizonatal layers are occurring.
Erosion, on the other hand, as it works from the top down, would not effect all the layers, at least not simultaneously.
It would only work from the existing top surface on down. Water erosion from rain, beach, rivers, etc do not typically produce flat surfaces. So, shouldn't these be evident in the sedimentary stratas?
I think they are. Witness the grand canyon. Witness the badlands of South Dakota. I even saw a picture of layers in New Orleans, exposed by Katrina flooding.
I believe some of the examples pointed to earlier in the thread do actually show this.
Just looking at the Siccar Point Unconformity, there are still many questions that SG does not answer.
Like what in particular?
One prediction you did not make which I think follow from a flood, especially a recent one, is that we should find fossils of the life that existed at the time of the flood all mixed together.
The flood was not simply water that covered the earth, but a mixture of water and earth. It would be more akin to a mud slide than a flash flood. So, I think what would be more expected is quick and mass burials of plants and animals.
Well, I am not sure this helps the flood model. If we did have a "mud slide" type of event (I assume this is caused by water rushing away from the subterranean vents), this should still mix up all the life that existed at one time, in some places probably more than the "slow sinking" of dead bodies through many feet of water. Trilobites should be mixed up with any other life that existed in their approximate habitat. It seems to me quite inconceivable that we would have layers and layers of trilobite like life with no starfish or lobsters or crabs or sea anemones or fish or even turtles, etc. If we find dinosaurs at a particular location, we should find everything else that lived in that area as well mixed up together. If we find all kinds of dinosaurs in the lower layers and then in higher layers find humans and other modern mammals, but they are never mixed even though they are found at the same location, this to me is very very compelling evidence against the flood.
The fact that this is exactly what does happen, all over the world wherever we look, pretty much falsifies the flood all by itself.
otseng wrote:THus, we should find heavier life forms in the lowest layers and the lightest life forms at the top, or at least a significant trend in this direction.
There would not be a significant time for heavier things to sink and lighter things to float. Rather, they would've instantly been swept away and/or buried.
Again, I don't see how this type of phenomenon as part of the FM could have occurred all over the world given the vertical location of the fossils we find.
As I recall, we DO find this in isolated locations, like the Karoo formation in Africa.
Unless a very compelling explanation can be found for this, to me this indicates that looking at evidence for a global flood is pretty pointless. To be a legitimate scientific model, the FM has to take into account all the evidence that we have. If even a high percentage of the evidence (say 80% however you measure that) is consistent with the FM but say 5% falsifies the FM, the 5% wins.
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