Excerpt from Bulletin of the Seismological Society of America, Vol. 6: 1916 Nola - Articles on the recent activity of Lassen Peak have been published by J. S. Diller in this bulletin, September 1914; by R. S. Holway in Uni versity of California Publications in Geography, August 7, 1914; Popular Science Monthly, March 1915; and Sunset, August 1915; and J. W. Rushing in The Dam, July and September 1915. The physics and chemistry of the recent eruptions of Lassen Peak are being investigated by Drs. A. L. Day and E. S. Shepherd of the Geophysical Laboratory, Washington, D. C. Lassen Peak, our most active volcano, lies in the northeast por tion of California, about 210 miles from San Francisco. It is the terminal peak at the southern end of the Cascade Range, and stands between the northern end of the Sierra Nevada and the Klamath Mountains. It is on the edge of one of the greatest lava fields in the world, extending from northern California, Oregon and Washington eastward across Idaho into Wyoming, covering an area of about square miles. Over the eastern portion of this field most of the lava is basalt which was very liquid at the time of its eruption and spreading far and wide like water it formed a flattish country, the Columbia plateau, but along the western border of the lava it is chiefly andesite, a viscous lava that did not spread when it was erupted but piled up about the vents from which it issued and built up a mountain range, the Cascade Range, surmounted by great peaks, from Lassen Peak, which rises feet, to Mount Rainier, that at tains an elevation of feet. 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.