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JOHN A. REID 



very gently to the east. These beds are water-laid granitic sands 

 of finer grain than the unsorted stuff above. They average six 

 inches in thickness. 



These water-laid strata might excite little more than passing notice 

 were it not for the fact that they belong to an extensive formation. 

 In traveling to Darwin from Keeler the road traverses the beds of 

 the present lake to the north edge of the basalt flows shown in Fig. 4. 

 The older Owens Lake cuts a small chff in the volcanic about 150 



Fig. 4. — View of Coso Range looking southwest from high end of Inyo Range. 

 Basalt ridge in right center rests on lake beds at south edge, and is notched by older 

 Owens Lake on north. Basalt shows much faulting. The white area south of basalt 

 ridge is composed of lake beds with some recent alluvium. Coso Peak in left center, 

 snow capped. Sierra Nevada — on extreme right. 



feet higher than the present water level. Three well-formed beaches 

 are preserved, with a number of smaller imperfect ones. Southward 

 the basalt is found lying upon rather coarse sands stratified poorly 

 at the top and well bedded below. These beds are granitic where 

 examined, with traces of volcanic ash. Some finely stratified fine- 

 grained beds occur in the lower part of the formation near the center 

 of the valley, which seem to contain considerable ashy material; 

 also some few small pebbles of schist and finer detritus of hke nature 



