258 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



At the invitation of Dr. L. F. Noble of the U. S. Geological Survey, the 

 assistant curator spent two weeks last December in an area on the south- 

 ern border of the Mojave Desert, the north flanks of the San Gabriel 

 Mountains. This region is in a zone of great faults. Here we find blocks 

 of Tertiary sediments dropped in between great breaks in the earth's crust. 

 In these sediments both marine and land forms were found imbedded. 

 From these fossils and stratigraphy as bases, the historical geology of this 

 region is being worked out. Some relations of the land laid deposits of the 

 Great Basin region with the marine of the Pacific Coast and Gulf of Cali- 

 fornia are being solved in this field. The nature of recent faulting and its 

 resultant topographic forms are wonderfully exempHfied in this field. The 

 results of this work will be published in collaboration with Dr. Noble, as a 

 Professional Paper of the U. S. Geological Survey. 



PUBLICATIONS 



Dr. C. E. Weaver published three papers in the Academy Proceedings 

 during the current year : — Eocene of Lower Cowlitz River Valley, Wash- 

 ington; The Post-Eocene Formations of Western Washington; and The 

 Oligocene of Kitsap County, Washington. The Stratigraphy and Fauna 

 of the Tejon Eocene of California was published by the assistant curator 

 in the University of California Publications. A paper entitled The Strati- 

 graphic and Faunal Relations of the Martinez Formation to the Chico and 

 Tejon of Southern California, by Mr. C. A. Waring and The Fauna of the 

 San Fernando Formation of Northeastern Mexico by R. E. Dickerson and 

 W. S. W. Kew have been accepted for publication. Papers entitled: 

 Geology of a Portion of the McKittrick District, by Mr. G. C. Gester, 

 Ancient Panama Canals, Climatic Zones of Martinez-Eocene Time, Climatic 

 Conditions During the Oligocene with Descriptions of New Species from 

 the Oligocene of Washington, by R. E. Dickerson, have been submitted to 

 the committee on publication. A paper on the Geologic History of the 

 Marysville Buttes is in course of preparation by the assistant curator. 



EXHIBITS 



The Standard Oil Company has installed an oil exhibit in the east wing 

 of the building and is now adding to, and improving it. Two cases of 

 fossils representative of the oil bearing rocks are installed in connection 

 with this valuable exhibit. 



A portion of the Henry Hemphill conchological collection showing varia- 

 tion is on exhibition in the main Museum hall. Typical shells from this 

 collection are being arranged in the reference room. 



Fossil freshwater fishes from an Eocene lake in Wyoming, a collection of 

 rocks and minerals from Washington, and a collection of the edible clams 

 of California are also displayed in the main hall. 



DONATIONS 



During the year many donations of valuable specimens have been re- 

 ceived by the Museum, which have been added to the research collections 

 of this department, as set forth in detail in the Director's report. 



