1984 Auburn CA Geology & Mineral Land Classification Set + 9 Fold-Out Maps

Vintage 1984 California Division of Mines & Geology report with original fold-out maps covering mineral land classification and geologic structure for the Auburn 15-Minute Quadrangle, El Dorado & Placer Counties, California.

This set includes:

Spiral-bound report: “Mineral Land Classification of the Auburn 15’ Quadrangle, El Dorado and Placer Counties, California" — S.L. Kohler – Open-File Report 83-37 SAC
9 large, original fold-out maps (Plate Nos. 1 – 9)
 • General Geology map (1:48,000 scale, mosaicked from USGS 7½’ quad maps)
 • Mineral Land Classification Map
 • Plates showing dredge tailings, intrusive/volcanic terrains, mineral deposits, fault lines, magnetic declination & more
Printed under James F. Davis, State Geologist – California Department of Conservation

These maps feature detailed overlays that identify:

• Gold placer deposits
• Chromite, copper & metallic index markers
• Tertiary river channel deposits
• Mesozoic volcanic arc & dioritic intrusion zones (Penryn /