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A bedrock belief of evolutionary geologists has been convincingly undermined today with the publication of research conducted by geologist Dr. Andrew Snelling.
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[__ Science __ ] Creation Scientist’s Ground-Breaking Research at Grand Canyon Published
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Barbarian
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- Jun 5, 2003
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Snelling's assumption falls apart in those cases were rock was bent too fast, and shattered.
In the last of a six-part compilation of geological evidences for the Flood, Dr. Andrew Snelling argued that the absence of brittle fractures in folded strata constituted reason to believe that the sediments were laid down in rapid succession. "When solid, hard rock is bent (or folded)," he says, "it invariably fractures and breaks because it is brittle." As an example, Dr. Snelling refers to the Tapeats Sandstone and Muav Limestone of the Grand Canyon succession, which were folded into a broad-scale monocline long after they were deposited. He claims that folding in the rocks "did not cause them to fracture and break," and so the "only logical conclusion is that the 440-million-year delay between deposition and folding never happened!" In other words, folding took place shortly after they were laid down—within the last 5,000 years—but the sediments have since had time to lithify (transform into solid rock).
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Dr. Snelling's argument works against him
Regardless of the nature of rock layers in the Grand Canyon, there are abundant example of brittle deformation in rocks elsewhere. A Google image search for "anticlinal tension fracture" will get you started without having to leave home. But next time you do find yourself hiking or driving past folded sedimentary strata, take a close look. Most rocks will contain abundant evidence for brittle deformation as a result of folding or uplift—and now you know what to look for!
I have also provided a couple pictures at the bottom of this post. These rocks represent the equivalent of the Tapeats Sandstone and Muav Limestone in northern Utah (Ogden Canyon), where the rocks have also been folded on a broad scale (during propagation of the Sevier Fold-Thrust Belt). In the picture on the left, the brittle Tintic Quartzite (silica grains and cement) has fractured throughout and even shattered in some points. On the right, anticlinal tension fractures are visible in the Maxfield Limestone (see Dr. Snelling's cartoon of how these form).
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n an effort to provide evidence of deposition in rapid succession during the Flood (and deformation immediately thereafter), Dr. Snelling cites one of the most powerful arguments against his interpretation of geologic history. According to Dr. Snelling's view of the Flood, we should not expect to find abundant evidence of brittle deformation in these rocks, but in fact we find it everywhere. Brittle faults and fractures are testament, rather, to the deep time behind geologic processes others have come to appreciate.
questioninganswersingenesis.blogspot.com
Here's an not-too-technical description of the way folds happen in rock:
In the last of a six-part compilation of geological evidences for the Flood, Dr. Andrew Snelling argued that the absence of brittle fractures in folded strata constituted reason to believe that the sediments were laid down in rapid succession. "When solid, hard rock is bent (or folded)," he says, "it invariably fractures and breaks because it is brittle." As an example, Dr. Snelling refers to the Tapeats Sandstone and Muav Limestone of the Grand Canyon succession, which were folded into a broad-scale monocline long after they were deposited. He claims that folding in the rocks "did not cause them to fracture and break," and so the "only logical conclusion is that the 440-million-year delay between deposition and folding never happened!" In other words, folding took place shortly after they were laid down—within the last 5,000 years—but the sediments have since had time to lithify (transform into solid rock).
...
Dr. Snelling's argument works against him
Regardless of the nature of rock layers in the Grand Canyon, there are abundant example of brittle deformation in rocks elsewhere. A Google image search for "anticlinal tension fracture" will get you started without having to leave home. But next time you do find yourself hiking or driving past folded sedimentary strata, take a close look. Most rocks will contain abundant evidence for brittle deformation as a result of folding or uplift—and now you know what to look for!
I have also provided a couple pictures at the bottom of this post. These rocks represent the equivalent of the Tapeats Sandstone and Muav Limestone in northern Utah (Ogden Canyon), where the rocks have also been folded on a broad scale (during propagation of the Sevier Fold-Thrust Belt). In the picture on the left, the brittle Tintic Quartzite (silica grains and cement) has fractured throughout and even shattered in some points. On the right, anticlinal tension fractures are visible in the Maxfield Limestone (see Dr. Snelling's cartoon of how these form).
...
n an effort to provide evidence of deposition in rapid succession during the Flood (and deformation immediately thereafter), Dr. Snelling cites one of the most powerful arguments against his interpretation of geologic history. According to Dr. Snelling's view of the Flood, we should not expect to find abundant evidence of brittle deformation in these rocks, but in fact we find it everywhere. Brittle faults and fractures are testament, rather, to the deep time behind geologic processes others have come to appreciate.
"Rock layers folded, not fractured" — or are they?
This blog explores a wide range of topics within geology, typically in response to claims by young-Earth creationists and "Flood geologists".
questioninganswersingenesis.blogspot.com
Here's an not-too-technical description of the way folds happen in rock:
Evolution of Geological Structures in Micro- to Macro-scales
Structural geology has developed at a very rapid pace in recent years. Evolution of Geological Structures in Micro- to Macro-Scales, covering a wide spectrum of current research in structural geology from the grain scale to the scale of orogenic belts and from the brittle to the ductile field...
books.google.com
Truthfrees
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- May 24, 2017
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cool - thanks