Geologic map of the Glenbrook 7.5' Quadrangle, by T. L. T. Grose, 1985.

Geologic map of the Glenbrook 7.5' Quadrangle showing geology, structure, and area of alteration plus brief descriptions of 18 geologic units, and a correlation column.

Available on the Web.

Map 2Bg, 29x21", 1:24,000-scale full-color map, $7.00