Water Supply and Irrigation Papers of the United States Geological Survey . Normally it receives only theoccasional overflow from distributaries of this river, but in 1904the Colorado was largely diverted to it, and only recently (1907)has that river been confined to its proper channel. The sink, there-fore, is now partially filled by a lake with an area of nearly 500square miles, which will probably not dry away completely for fif-teen or twenty years. A GREAT TROUGH. The most important sinks of the desert form a more or less con-tinuous group along a northwest-southeast line, which may be sp
Water Supply and Irrigation Papers of the United States Geological Survey . Normally it receives only theoccasional overflow from distributaries of this river, but in 1904the Colorado was largely diverted to it, and only recently (1907)has that river been confined to its proper channel. The sink, there-fore, is now partially filled by a lake with an area of nearly 500square miles, which will probably not dry away completely for fif-teen or twenty years. A GREAT TROUGH. The most important sinks of the desert form a more or less con-tinuous group along a northwest-southeast line, which may be spokenof as the Great Trough. The Death Valley axis is about 150 miles long, and extends fromthe north end of the valley southeastward to Silurian Dry begins the sink of the Mohave Basin, which extends southwardthrough Soda Lake and the Devils Playground to Bristol, Cadiz,and Danby dry lakes, a distance of over 125 miles. It is separatedfrom the Death Valley trough only by the low divide between Silu-rian Lake and Silver Lake, which are less than 15 miles CLIMATE. 11 The trough of the Colorado Desert extends from San Gorgon ioPass southeastward through the Salton Sink to the Gulf of Cali-fornia. It is separated from the Mohave Basin by the San Ber-nardino, Cottonwood, Chuckwalla, and Chocolate mountains, and soforms an overlapping parallel axis of depression. This great axis isknown to be closely related to widely extended geologic structures,and it is probable that the Death Valley axis has been similarlydetermined. In addition to these major controlling depressions, the entire desertarea consists of a series of more or less nearly parallel ranges andintervening minor desert valleys. In the northern part of the areathe trend of these features is nearly north and south, and in thesouthern part the trend swings to the southeast; but in die inter-mediate region there is an area of confused, broken ranges in Avhichdefinite trends seem to be lacking. FAULT LINES. I
Size: 1220px × 2049px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorunitedstatesgeologica, bookcentury1900, bookdecade1900
