Field Book of Common Rocks and Minerals

For identifying the Rocks and Minerals of the United States and interpreting their Origins and Meanings

By Frederic Brewster Loomis Late Professor of Mineralogy and Geology in Amherst College

With 47 Colored Specimens and over 100 other Illustrations from Photographs by W. E. Corbin and drawings by the Author

G. P. Putnam’s Sons New York and London

FIELD BOOK OF COMMON ROCKS AND MINERALS

Copyright, 1923, 1948 by Frederick Brewster Loomis

Twenty-sixth Impression Revised 1948

All rights reserved. This book, or parts thereof, must not be reproduced in any form without permission.

Made in the United States of America

Dedicated TO MY MOTHER WHO ENCOURAGED ME WHILE A BOY TO GATHER MINERALS, ROCKS AND FOSSILS.

vii