PROJECT:
Geologic Mapping in Southern Washington Cascades

Project Map

Map of southwestern Washington showing 7.5-minute quadrangles with published geologic mapping (green), completed mapping being compiled for publication (yellow), and mapping in progress (blue). Unshaded quadrangles indicate areas of future study. Thick shaded line marks the edge of Southern Washington Cascades Conductor (SWCC, Stanley and others, 1987) relative to Holocene (red) and late Pleistocene (blue) composite volcanoes. Not shown are maps at smaller scale published for Mount Adams (Hildreth and Fierstein (1975)) and currently being compiled for publication for the Mount St. Helens Volcanic Monument.