File:Forest physiography; physiography of the United States and principles of soils in relation to forestry (1911) (14776755555).jpg

Identifier: forestphysiograp01bowm (find matches)
Title: Forest physiography; physiography of the United States and principles of soils in relation to forestry
Year: 1911 (1910s)
Authors: Bowman, Isaiah, 1878-1950
Subjects: Physical geography Forests and forestry Soils
Publisher: New York, J. Wiley & sons (etc., etc.)
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
previously gentle incline and plunges steeply down to depths of8000 feet and more.- At the foot of this steep decline the sea bottomagain assumes low gradients. The slope constitutes a notable moun-tain front rising from the floor of the Pacific and forming the naturalwestern boundary of the coast system of mountains. It is interpretedas a great submarine fault scarp or series of fault scarps comparable tothose that form the eastern front not only of the Coast Ranges of Cali-fornia but also of the Sierra Nevada. At the base of the steep sub-marine scarp, dredgings (Tuscarora explorations) at the depth of 12,000feet have brought up fragments of bituminous shale which are con- i A. C. Lawson and others, Section on Geology, The California Earthquake of April i8,1906, Carnegie Inst., vol. i, pt. i, pp. 2, 3 et al. 2 Andrees Handatlas, bathymetric chart. No. 157. COAST RANGES 129 GEOMORPHIC MAPOF CALIFORNIA SHOWING THE DIASTROPHIC CHARACTER OF THE RELIEF AND THE MOST IMPORTANT KNOWN FAULTS
Text Appearing After Image:
Fig. 24. — Map of California. The heavy lines indicate the principal faults. 130 FOREST PHYSIOGRAPHY sidered to be talus debris of so recent origin as not yet to have beenburied by oceanic sediments. The coastal scarp above sea level is not everywhere regular in de-velopment; the most noticeable interruption is the Bay of Montereyand adjacent slopes, which form parts of a syncHnal trough whose axisis at right angles to the trend of the coast and of the Coast Ranges as abelt. A second interruption of the continuity of the coastal scarp isat the Golden Gate and is due to a depression of the Coast Rangeswhich resulted in the drowning of the lower portions of land valleysthat formerly crossed the coastal mountains. The Point Rees penin-sula is a third important break in the continuity of the coast line ofCalifornia and is due to the manner in which the depression east of theridge forming the peninsula has been drowned; the northern end of thevalley is occupied by Tomales Bay, the southe

Note About Images