Vol. VII] EVERMANN— DIRECTOR'S REPORT FOR W17 353 



and they will add some information as to the life of the Eocene in the 

 southern part of the state. 



A general report upon the geology and paleontology of the Marysville 

 Buttes, an ancient volcano of the Sacramento Valley, is in course of 

 preparation. 



Mr. Clark Gester, geologist, Standard Oil Co., is preparing a geological 

 and stratigraphic report upon a portion of the Peruvian coast and the 

 curator is contributing the paleontological data upon this interesting field. 

 A portion of these rocks are upper Eocene in age while the rest of the 

 tertiary sandstones and shales are Oligocene or Miocene. 



The study of the molluscan fauna of the Carrizo Creek beds. San Diego 

 County, has already yielded some interesting results in showing that we 

 have a fauna upon the present Pacific Coast whose affinities are Atlantic. 

 This fauna was also collected from sandstones in San Gorgonio Pass by 

 Mr. Frank Vaughan. Dr. L. F. Noble and the curator hope to find some 

 stratigraphic connections between these beds and the landlaid deposits of 

 that region during the next year. 



Geological mapping in the Santa Rosa and Petaluma Quadrangles has 

 progressed during the past year and an excellent Pliocene fauna from 

 Wilson's ranch in Santa Rosa Valley was obtained. As noted above, con- 

 siderable paleontological information has been obtained as well. 



Dr. L. F. Noble of the U. S. Geological Survey and the curator spent 

 six weeks in the field in southern California in an elongated area extend- 

 ing from Tejon Pass to Cajon Pass in the San Andreas Rift Zone. INIuch 

 new information concerning the type of faulting and its topographic expres- 

 sion along this famous rift was obtained. A stratigraphic relation between 

 the Santa Margarita, marine upper Miocene of the Pacific Province and 

 the landlaid deposits which are apparently Barstow Miocene of the Great 

 Basin Province, was discovered and their essential synchrony proved. The 

 geological and paleontological history of this portion of southern Cali- 

 fornia is of particular importance not only to the student of geology but 

 to the naturalist who desires to study the distribution of plants and animals, 

 because his problems are peculiarly tied to the past in this region of great 

 recent mountain building. Some field work is yet to be completed in this 

 interesting region. 



Mr. F. M. Anderson is preparing a report upon the paleontology and 

 stratigraphy of the northern Colombian coast, South America. This work 

 is particularly important, for rarely in the Antillean Province can satis- 

 factory stratigraphy be obtained, but Mr. Anderson's work will aid greatly 

 in solving some of the problems of the Caribbean. 



The curator and other members of the Academy have prepared and 

 published within the year a number of papers and reports based on the 

 department's collections. These are listed in the President's report. 



Many kind friends of the Academy have made donations during the 

 year. The most important accession is a loan collection of fossils from 

 the California State Mining Bureau. This collection has much valuable 

 reference material in it and many of Dr. J. G. Cooper's type specimens 

 have been segregated. A detailed list of donations is set forth in the 

 Director's report. 



