The first session was called to order at 10 a. m. Tuesday, August 3, in Bacon Hall, University of California, by C. P. Tolman, Jr., chairman of the Cordilleran Section, in the absence of President Arthur P. Coleman, of the Geological Society. After announcements in regard to proposed excursions, the dinner, and the official program, the following papers were read in the order given:
EPIGENE PROFILES OF THE DESERT
BY ANDREW C. LAWSON
Read in full from manuscript.
In reply to a question by Professor Holway, Dr. LAWSON explained that the profile limit of the pan-fan stage in the desert profile was reached only occasionally. Changes of climate usually interrupt the pan-fan stage.
Prof. BAILEY WILLIS cited instances in desert regions of China and Patagonia to show th a t the pan-fan stage is rarely reached.
Dr. Lawson is of the opinion that the. . .