Horse Mountain Quarry
From Underfoot
Q49419214
mine in Modoc County, California, United States of America
| Type | Subtype | Date | Description | Notes | Source |
|---|---|---|---|---|---|
| site | cave | Merrill Cave | cave | Wikidata | |
| site | cave | Mushpot Cave | show cave, lava tube | Wikidata | |
| site | cave | Skull Cave | show cave, lava tube | Wikidata | |
| site | cave | Valentine Cave | cave | Wikidata | |

