The Cordilleran Section of the Geological Society of America held its twenty-fifth annual meeting at the Department of Geology, Stanford University, California, on January 29 and 30, 1926, in conjunction with the Pacific Coast Branch of the Paleontological Society of America and the Le Conte Club.
The following officers were elected to serve during 1926:
Chairman, Eliot Blackwelder
Secretary, John P. Buwalda
Councilor, William T. Miller
The meeting was called to order at 2.00 p. m. by the Chairman, Eliot Blackwelder. Dr. Blackwelder then requested Dr. C. F. Tolman to take the chair and conduct the symposium arranged by him at the invitation of the Executive Committee.
SYMPOSIUM ON SILICEOUS SHALES AND ORIGIN OF PETROLEUM IN CALIFORNIA
C. F. TOLMAN, LEADER
OPAL AND ITS RELATION TO OTHER FORMS OF SILICA
BY AUSTIN F. ROGERS
DISTRIBUTION AND THICKNESS OF DIATOMACEOUS SHALES . . .