ABSTRACT
Over the past 150 years, Mount Diablo has served as a window into the evolving understanding of California geology. In the 1800s, geologists mapped this easily accessible peak located less than 100 km (62 miles) from the rapidly growing city of San Francisco and the geology departments at the University of California at Berkeley and Stanford University. Later, the mountain served as a focal point for investigating San Francisco Bay area tectonics. The structural interpretation of the up-thrusting mechanisms has evolved from a simple compressional system involving a few local faults to a more complex multifault and multiphase mountain-building theory. The stratigraphic interpretation and understanding have been advanced from a general description of the lithologies and fossils to a detailed description using sequence stratigraphy to define paleogeographic settings and depositional regimes.
In May 1971, the Chens arrived in Hong Kong. In October of the same year, Jack went on his speaking tour. It was a success, and they decided to emigrate to the United States. Both worked at Cornell University, and then in 1978, they moved to the San Francisco Bay Area, where Yuan-tsung worked at the East Asiatic Library at the University of California, Berkeley until she retired in 1992. In 2010, she moved to Hong Kong and started to write her present memoir. After the Party authorities implemented the National Security Law in 2020, the strategy of “shock and awe” put Yuan-tsung on tenterhooks. However, in spite of herself, she was determined to complete her book and get it published.
The Purisima Formation and related rocks (upper Miocene - Pliocene), greater San Francisco Bay area, central California; review of literature and USGS collection now housed at the Museum of Paleontology, University of California, Berkeley