Interpretive aeromagnetic map of the Eagle Mountains Wilderness Study Area, Riverside County, California

This report describes the interpretation of aeromagnetic surveys of the Eagle Mountains area, concentrating on the Eagle Mountains Wilderness Study Area (WSA). The interpretations are based on correlations with mapped surface geology by R. E. Powell, reproduced here from Powell and others (1984), as a base for the aeromagnetic data.

The Eagle Mountains Wilderness Study Area consists of about 49,723 acres in the southeastern and east-central part of the Eagle Mountains, Riverside County, California, just north of Interstate 10 about 170 mi east-southeast of Los Angeles. The western boundary of the WSA abuts Joshua Tree National Monument, the northern boundary skirts the Eagle Mountains mining district, and parts of the southern and eastern boundaries follow the Colorado River aqueduct. Principal access to the interior of the WSA is provided by jeep trails in Big Wash and an unnamed, major north-draining wash in the western part of the study area.