Excerpt from Geological Society of Washington: Presidential Address, With Abstracts of Minutes for 1897 and 1898 and Lists of Officers and Members, 1898 With the close of the Laramie sandstone the long-continued deposi tion of. Mesozoic and Paleozoic sediments finally came to an end. In this region unconformity of sediments by deposition has not as yet been recognized, and in this sense alone they may be said to be conformable from Middle Cambrian time to the summit of the Laramie. Stupendous orogenic movements took place, and the surrounding country became one of mountain-building on a grand scale, accompanied by plication, folding, and faulting. The evidence all points in one direction - that this uplifting was contemporaneous in all the ranges of the northern Rocky Mountains. For this reason and owing to its great geological significance, being one of the most important in Rocky Mountain geo logical history, this uplifting has been designated the post-laramie movement. 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.