Geologic Map of the Upper Grande Ronde River Basin, Union County, Oregon

Oregon Department of Geology and Mineral Industries (DOGAMI)

This 1:100,000-scale regional map covers more than 1,622 square miles in north-central Oregon. The forty-seven geologic units shown at this scale were created from units mapped at 1:24,000 scale; attributes at both scales are stored in the accompanying publication geodatabase. The cartographic challenge was to differentiate the forty-seven units. Cross-sections were created from water well data. ArcMap vector and raster layers were exported for final assembly and layout in Adobe Illustrator. Thirteen figures in the sixty-five page text report were also extracted from the geodatabase.

The Oregon Department of Geology and Mineral Industries (DOGAMI) produces maps and reports for the public and government to reduce the loss of life and property due to geologic hazards and to manage water and other geologic resources. DOGAMI helps Oregonians understand and prepare for earthquakes, tsunamis, coastal erosion, landslides, floods, and other geologic hazards.

Courtesy of Oregon Department of Geology and Mineral Industries.

Map Book Page [PDF]