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Describe First Hand Account.....................................
As Experienced By Reader.

2007-10-27 14:42:22 · 5 answers · asked by Anonymous in Science & Mathematics Earth Sciences & Geology

5 answers

One of my favorites is a cave that I mapped in Montana in the Beartooth Mountains. This area has had significant structural deformation, and this cave formed in the Madison Limestone Formation, at the unconformity with the Amsden Formation and is now oriented in a totally vertical direction. It has an upper and lower entrance. Dip in the Madison at this location is about 90 degrees.

However, the cave did not form in that position. It contains small corroded stalagmites and stalactites that are now pointing in a horizontal direction. The cave also contains scalloping on the walls, which is evidence of horizontal water flow through the cave, and does not occur in cave passages that form vertically. The cave, which I named the Ybra Cave, due to its proximity to the YBRA (Yellowstone Bighorn Research Association) is clearly a paleocave, that likely formed during the late Mississippian, when this region was a major karst unconformity. The cave likely survived millions of years of burial by being filled with soil and clay that have now been washed out of the cave. It is almost one of the oldest caves I have ever visited, and is likely to be one of the oldest caves I have ever discovered and mapped. I believe this cave is early Pennsylvanian to late Mississippian in age, about 300-310 million years old!

Another satisfying reason this cave is so important, is that it totally blows away the assertions by young-earth creationists that paleokarst is not "real" evidence of ancient cave formation, and it is totally incompatible with the global flood they love to explain. Field geology is the only way to understand these things, and the lack of real experience by these so-called scientists is evident when they attack concepts such as paleokarst.

2007-10-28 10:48:46 · answer #1 · answered by carbonates 7 · 1 0

How about evidence of an ancient lake in Missoula, Montana and further evidence of great floods in the area?
The floods are thought to have originated from the former Lake Missoula and flowed into the Clark canyon and through Washington State.
Evidence of the floods include large(30 foot tall) ripple marks, over-sized gravel bars, and a canyon the doesn't "fit" the river running through it.

2007-10-27 15:46:28 · answer #2 · answered by TheBodyElectric 3 · 2 0

Just 2 months ago I saw the The Lewis Overthrust of Waterton/Glacier. It's not as spectacular as the lightning from the ash eruptions of Mt Redoubt I saw in 1989, but more bizarre to me.

2007-10-27 14:56:34 · answer #3 · answered by Now and Then Comes a Thought 6 · 2 0

There's all these low grade metamorphic rocks in the Brevard zone sandwiched between all these very very high grade metamorphic rocks here in the Inner Piedmont of Alabama. Why are they there? How did they get there? Its bizarre. So bizarre is the topic of my thesis.

2007-10-27 14:50:51 · answer #4 · answered by Lady Geologist 7 · 3 0

this...

http://en.wikipedia.org/wiki/Image:SpiderRock.jpg

still has me scratching my head in wonder and still leaves me breathless after just seeing a picture of it.... can't really explain what I felt, seeing it in person... awe comes close....

2007-10-28 03:14:21 · answer #5 · answered by meanolmaw 7 · 0 1

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