Produced by Stephen Hutcheson and the Online Distributed Proofreading Team at http://www.pgdp.net THE COMMON ROCKS AND MINERALS OF MISSOURI W. D. KELLER UNIVERSITY OF MISSOURI PRESS • COLUMBIA University of Missouri Press, Columbia, Missouri 65201 ISBN 0-8262-0585-2 Library of Congress Card Number 67-66173 Printed and bound in the United States of America All rights reserved First Edition 1945 Revised Editions 1948, 1961 Reprinted 1971, 1973, 1978, 1986, 1989, 1992, 2004 TABLE OF CONTENTS Page INTRODUCTION 5 DETERMINATIVE KEY 6 ROCK AND MINERAL DESCRIPTION 10 Limestone and Dolomite 10 “Cotton Rock” Limestone 15 Marble 15 Cave Onyx and Deposits 16 Travertine 16 Calcite 16 Dolomite 18 Shale 20 Fire Clay 24 Plastic Fire Clay 26 Flint Fire Clay 26 Diaspore 27 Burley Clay 29 Sandstone 30 Chert, Flint 34 Weathered Chert 36 “Kaoleen” 37 Tripoli 37 Agate 37 Jasper 38 Granite 38 Quartz 41 Feldspar 43 Mica 44 Porphyry, Rhyolite 45 Basalt 46 Gabbro, Diabase 48 Goal 49