More than 225 million years ago, logs floating in a shallow sea sank to the bottom, were replaced with silica, and became petrified. This and other geologic processes that are part of the Petrified Forest are explained for those who have little, if any, knowledge of geology. It is also useful for geologists....
Paperback: 48 pages
Publisher: Arizona Geological Survey (December 8, 2000)
Package Dimensions: 8.8 x 5.8 x 0.2 inches
Amazon Rank: 5941429
Format: PDF ePub Text djvu ebook
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This short book consists of a series of two-page mini-articles on various terrain features in the park. The left page of each mini-article will have a photo of a geological feature, and the right page will have a VERY brief text on it, usually just ...