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Rocks and Minerals of the San Francisco Bay Region by Oliver E. Bowen; Helen Laudermilk is a nonfiction available to read on EtoBox.

What is Rocks and Minerals of the San Francisco Bay Region about?

Franciscan group. They underlie much of Marin and San Francisco peninsulas and form the core of Mt. Diablo. In addition to marine sandstone, shale, limestone, and chert-which make up the bulk of the Franciscan rocks-this group has been invaded by a variety of molten, or at least partly molten, materials that have solidified to form dark igneous rocks. Basalt, diabase, and peridotite, later altered to serpentine, are most common among these. Last and most important, vapors given off during these molten invasions are probably responsible for that highly colorful group of rocks, the glaucophane schists-also part of the Franciscan group. Would-be collectors of rocks and minerals will do well to note the distribution of the ancient crystalline schists, gneisses, and Franciscan-group rocks, for it is in these that much of the best specimen material occurs.

Who reads Rocks and Minerals of the San Francisco Bay Region?

Author

Oliver E. Bowen; Helen Laudermilk

Publisher

University of California Press

Published

2020

Language

EN

ISBN

9780520327153

Category

nonfiction

Subjects

History, Nature, Biology