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Coconino Sandstone
Beginning of paper
Abstract
The sediments and the trace fossils of the record the advance passage of a major eolian sand sea. Both invertebrate and vertebrate traces indicate that the substrate was, was for the most part, very dry though it was clear that light rainfall or dew periodically moistened the dune surfaces. Although we know that the erg was characterized ....
Middle of paper ....tional three-dimensional exposures in the Grand Canyon give the sedimentologist and ichnologist the opportunity to examine the details of one of the more classic and interesting eolian deposits on the Colorado Plateau.
Lithology
This layer averages about 260 million years old and is composed of pure quartz sand, which are basically petrified san.... |
Word count: 1125 |
Page count: 5 |
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