Introduction -- Part I. Superficial features -- Chapter 1. Geography -- Chapter 2. Quaternary geology -- Part II. Geology of the bedrock -- Chapter 3. Pre-Cambrian rocks and sedimentary formations -- Chapter 4. Post-Cambrian igneous rocks -- Chapter 5. Structure -- Chapter 6. Geologic history -- Part III. Ore deposits -- Chapter 7. Production, history, and mine development / Charles W. Henderson -- Chapter 8. Classification and mineralogy -- Chapter 9. Primary (hypogene) ores and ore bodies -- Chapter 10. Genesis of the hypogene ores -- Chapter 11. The oxidized ores -- Chapter 12. Alteration and enrichment of the ores -- Chapter 13. Local descriptions -- Chapter 14. Ore reserves -- Chapter 15. Bibliography -- Appendix. Mining claims in Lake County -- Index.