Excerpt from Metamorphic Geology: A Text-Book The composition of the average igneous rock as calculated from analyses of sediments. Comparison of calculated proportions of sediments with those observed In geologic sections katamorphic redistribution OF average igneous rocks IN terms OF sediments (by volume) Volume change in development of unconsolidated sediments Total volume of sediments calculated from amount of ocean salts katamorphic redistribution OF igneous rocks IN terms OF min erals (by weight) Average mineral composition of igneous rocks Average mineral composition of sediments Redistribution of quartz Redistribution of the Ieldspars. Redistribution of ferromagnesian minerals Redistribution of principal accessory minerals katamorphic redistribution OF igneous rocks IN terms OF chem ical constituents (by weight). Constituents added from the hydrosphere and atmosphere during katamorphism of igneous rocks Redistribution of Silica. Alumina iron. Magnesia. Lime. Potash. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.