The region considered in this report is shown on the north-west portion of the Lang Quadrangle, (Edition of 1933, scale 1/24,000) and the north-east portion of the Humphreys Quadrangle, (Edition of 1932, scale 1/24,000). The region is approximately 45 miles north of Los Angeles and therefore lies in the Coast Range Province. The area mapped is a...

The region to be considered in this report is in Los Angeles County, Calif. and is included in the Lang Quadrangle surveyed in 1929 with a scale of 1:24,000 and a contour interval of 5 and 25 feet. The region is also shown on the San Fernando Quadrangle with a scale of 1:62,500 and a contour interval of 50 feet. The area mapped is included betwe...

The region to be considered in this report is in Los Angeles County, Calif. and is included in the Lang Quadrangle surveyed in 1929 with a scale of 1:24,000 and a contour interval of 5 and 25 feet. The region is also shown on the San Fernando Quadrangle with a scale of 1:62,500 and a contour interval of 50 feet. The area mapped is included betwe...

Situated in the San Gabriel Mountains of Southern California is a large body of anorthosite which is associated a number of bodies of ilmenitic magnetite. During the summer of 1937, the E. I. duPont de Nemours Corporation obtained options on a group of properties thought to contain several such deposits. In connection with the exploration of the...