Album caption: Flow failure in hills southeast of Half Moon Bay. Note that the displaced sediments piled up in a ridge on the gently sloping terrain rather than spreading out. Similar photograph previously published in Lawson and others (1908, pl. 132A) with caption "Earth-flow in hills east of Half Moon Bay. San Mateo County, California. 1906.
Published as figure 20 in U. S. Geological Survey. Professional paper 993. 1978. (Not available from U.S.G.G. Photo Library. Photograph from J. C. Branner collection, courtesy of Stanford University Archives.)
