Excerpt from The Earth and Its Story: A First Book of GeologySandstone. Pebble-rocks or Conglomerates (pudding-stones) Where the Materials of Sandstone come from. - Limestones and Marbles. - Organic Nature of Limestones. - The Obliteration of Organic Traces. - Coquina Rock. Chalk. Oceanic Ooze, Globigerina Ooze. - Flags, Shales, and Slates. - Granite. - Distinct Types of Granite. - Origin of Granite. - Igneous and Aqueous Rocks. Gneiss. Origin of Gneiss. Mica Schists and other Schists.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.