726 ARTHUR C. TROWBRIDGE 



LAKE BEDS NEAR HAIWEE 



Toward the south end of Owens Valley, in the vicinity of Haiwee 

 post-office, there is a series of calcareous and arenaceous lake beds. 

 They were seen by the writer \ mile southwest, i mile east, and f 

 mile northwest of the post-office. They are fine, white, and distinctly 

 bedded. East of the post-office, the beds dip 8° to the northwest. 

 Northwest of the post-office they dip 14 north. They were best 

 seen f mile northwest of the post-office, where a hill 175 ft. exposes 

 them from top to bottom. They consist of light-colored, siliceous 



Fig. 16. — Unconformity between Quaternary conglomerates and Pliocene lake 

 beds north of Haiwee. Some of the bowlders of the conglomerate are composed of the 

 underlying clays. 



fine clays or shales. In the lower part of the exposure numerous 

 small flat bodies of gypsum occur. Most of the plates lie parallel 

 with the beds, but in some places they appear as secondary bodies 

 along joints and faults. 



The lake beds here are covered with a hard, coarse conglomerate 

 derived from the Coso Mountains to the east. The lake beds and 

 conglomerates are unconformable. The conglomerate lies on the 

 very irregular surface of the truncated edges of the dipping beds of 

 clay, the surface between the two having a relief of about 15 ft. 

 (Fig. 16). The constituents of the conglomerate are chiefly granite, 

 sedimentary rock, and scoriaceous basalt, but near the contact many 

 large fragments of the underlying clays are also included. The 



