Flow failure east of Half Moon Bay. San Mateo County, California. 1906.

Album caption: Flow failure east of Half Moon Bay. Panoramic continuation of Youd 17 showing ridge of deposited debris. Note the pick leaning against debris in center of picture and man standing on rim of cavity behind debris at right. San Mateo County, California. 1906. Published as figure 21-B in U. S. Geological Survey. Professional paper 993. 1978. (Not available from U.S.G.S. Photo Library. Photograph by R. A. Anderson, J. C. Branner collection, courtesy of Stanford University Archives.)