Category: Science - Earth/Agricultural/Farming
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,...
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 r...
2. Part 2The value of a limestone quarry for agricultural purposes depends upon availability, amount of overburden, purity of the stone, ease of crushing, and size of deposit. For instan...
3. Part 3A hard, white variety of flint fire clay which breaks with numerous conchoidal fractures in appropriate shaped fragments has been called locally “pop-corn flint.” This clay, and...
4. Part 4Sandstone in Missouri is made almost entirely of quartz grains which have been broken, worn, and more or less rounded during their long travel history. The sandstone formation q...
5. Part 5Limonite is a heavy, yellow to brown, or brownish black mineral which always leaves a yellow to brown mark or streak when rubbed across a hard white rock or unglazed porcelain....
6. Part 6The examples given below illustrate the two types. Everyone knows about the extrusive forms from accounts of present-day volcanoes and occasional lava flows, like those of Vesuv...