A systematic description of hillslopes in the region - their steepness, what they are made of, and the physical properties of bedrock and soil that affect engineering use of the land.

Additional title page description: The distribution and character of the bedrock and surficial deposits in the northern part of the City of San Francisco and southern Marin County, Calif., including a description of the Franciscan Formation in its type area and notes on engineering geology in an urban area.