N.Wells
Posts: 1836
Joined: Oct. 2005
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| Quote (GaryGaulin @ Aug. 06 2016,21:23) | | Quote (N.Wells @ Aug. 06 2016,21:03) | | Quote | | Multiple layers of trace fossils showing many generations of dinosaurs and other land animals thriving just fine in an often dry and arid (yet supposedly always underwater) environment is causing their logic to completely break down, in a rather humorous way. |
Very true.
| Quote | | Above or below 3500 feet (1,067 m)? |
About that, perhaps, depending on where "in the valley" you are starting. If the outcrop of interest is 5000 m ESE of you and is at 30 m above sea level, then it would pass over you at almost 1200 m up, or about 1050 m above you (3886 ft a.s.l.). However, if the site is only 1 km E of you then it would not even be at twice your current elevation (230 m). All assuming no folds or faults between it and you. |
I was more wondering the rift valley floor where I'm at in the strata when the land was level and the dinosaurs were walking on it. From what I understand the expanding valley caused the floor to sink, while new sediment piled on top of it. There should not have been an overly large change in altitude being caused by the flood water sedimentation. |
I don't know. The area would have been regionally domed prior to rifting: for instance, the floor of the East African Rift Valley varies from sea level to higher than 1500 m. However, the area was a flat plain before it started to dome in the Miocene, and that flat surface now varies from 600 m away from the rift to 1500 to 1800 m on the shoulders of the rift (so the center mostly fell over 1000 m).
The Appalachians also broadly upwarped again in the Cenozoic (this is why some parts of the Appalachians like Georgia have lots of gorges and waterfalls), so modern elevations are not a good clue to ancient elevations.
There are probably some estimates in the literature somewhere, but I'm not aware of them.
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