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Recent Posts
- Where did the bulk of the placer gold in Tertiary river sediments in California come from?…maybe Nevada!
- Pritchard Marble Quarry and Kiln near Colfax…a well-kept secret of Sierra Foothills history
- New petrified log display at the UC Davis Geoscience Building
- New theory for the occurrence of gold nuggets in the “Early Tertiary Auriferous Gravels” of California
- CDMG Special Report 19—Geology and Ceramic Properties of the Ione Formation, Buena Vista Area, Amador County, California
- Re-evaluation of the origin of kaolinite in the Ione Formation
- Gold Bearing Gravels of the Ancestral Yuba River, Sierra Nevada, California
- The Upper Reaches of the Sierra Nevada Auriferous Gold Channels, California and Nevada
- A Historical Review Of The Age Assignments Applied To The Chalk Bluff Fossil Plant Assemblage
- Geology of the Ione Formation in the Ione Area
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Tags
- anauxite
- Bear River Marble
- bench gravels
- California Geological Survey geologic hazard notice
- channel gravels
- Colfax History
- detrital clay clasts
- Early Eocene tropical climate
- Early Tertiary auriferous gravels
- Early Tertiary Oxisols
- Eocene flora
- Eocene kaolinite
- Eocene Oxisol
- Ione Formation
- Ione Formation kaolinite
- Late Eocene climate change
- Late Eocene smectite
- lateritic weathering
- lower gravels
- origin of gold nuggets
- pedarenite
- pedogenic silica cement
- petrified logs
- petrified wood
- Placer County limekiln
- San Francisco tile
- Sierra Foothills
- supergene gold enrichment
- UC Davis rock garden
- upper gravels