Description of the geology of the bedrock and surficial deposits in and near Pueblo, Colo. Engineering behavior of the rocks is summarized at the end of report.

A restudy and adoption of a formal name for the andesite that was the subject of Bulletin 1 of the U.S. Geological Survey.

Descriptions, chemical analyses, and ages for an alkalic sill complex and for mafic feldspathoidal and basaltic effusive rocks.

A study of the relation of geology, engineering, and water supply to the planning and construction of the U.S. Air Force Academy.

Includes lists of railroads, streetcar lines and stage companies in the quadrangle, and military and civilian camps, forts, posts and bases in Colorado.