268 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



before the close of the Glacial epoch, for on the east side 

 of White Mountain, near the north end of the Inyo range, 

 there is evidence that the upper parts of the canyons were 

 occupied by glacial ice and it seems unlikely that glaciers 

 could have existed there when the range was 3,000 feet 

 lower. ^ That a movement of such magnitude should not 

 also have affected the Sierra Nevada lying immediately west 

 is improbable. Positive evidence of comparatively recent 

 displacements along the east slope of the Sierra has been 

 adduced by several observers. Turner^ notes a displace- 

 ment on the east side of Mohawk Valley said to have 

 occurred in 1876; Lindgren' describes recent faulting along 

 the line of the Central Pacific Railroad at Verdi, and to the 

 southeast of Lake Tahoe to the west of Genoa; Russell^ 

 refers to a fault just northwest of Mono Lake cutting a 

 moraine, and hence post-glacial. The displacements formed 

 at the time of the earthquake of 1872 in Owen's Valley, 

 chiefly along the west side, furnish further evidence in the 

 same line. The destruction of life and property was great- 

 est at Lone Pine, not far from Owen's Lake; here many 

 people were killed or injured. The shaking of the ground 

 continued at intervals for many days after the strong- 

 est shocks. South of Lone Pine a line of poplar trees 

 entirely disappeared. Just northeast of Owen's Lake is a 

 small basin which is said to have been formed at the time 

 of the earthquake. It was occupied by water for some 

 time, but is now dry. Extending from this dry lake to 

 Lone Pine is a terrace-like embankment produced by the 

 subsidence of a narrow strip of land, and this subsided 

 strip now contains pools of water, while considerable 

 portions of it form meadow-land. This earthquake seems 

 clearly to have resulted from a slip along the great fault of 

 the Sierra. 



1 In the Silver Peak Range, lying just east of the Inyo Mountains, there is no evidence 

 of the former existence of glaciers. The Silver Peak Range attains an altitude of 9,500 

 feet. 



2 Bull. Phil. Soc. Washington, Vol. XI, i8gi,p. 396; and Downieville folio, U. S. Geol. Surv. 



3 Journ. Geol., Vol. IV, 1896, pp. 898-899. 



< Kighth Annual Rept. U. S. Geol. Surv., Part I, 1889, p. 389. 



