Marblehead Quarry
From Underfoot
Q49429610
mine in Adams County, Illinois, United States of America
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Location: 39.8475, -91.3614, KML, Cluster Map, Maps,
1 places
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Mark Twain Cave ⓘ
cave in United States of America
| Type | Subtype | Date | Description | Notes | Source |
|---|---|---|---|---|---|
| site | cave | Mark Twain Cave | show cave | Wikidata | |