Research13.9 mi
Martin Marietta Quarry
Zinc, Iron
USGS ResearchIOWA LOCAL FIELD REGION
Coralville Devonian Country Rockhounding Guide
Devonian fossil and limestone geology including the protected Fossil Gorge and nearby river context.
LOCAL INTERACTIVE MAP
Coralville Devonian Country local map
Explore nearby Iowa records without leaving this hub. Status, coordinate precision and access evidence determine whether a pin is a realistic field destination.
Map
Land intelligence
Precision
This hub map shows nearby records only.Land and claim layers are planning aids, not collecting permission.
Reference photograph used for rock and mineral identification. It is not from this exact location or a guarantee that collecting is permitted.
Mapped leads in Coralville Devonian Country
The records below may represent collecting sites, managed programs, protected resources or research-only geology. Their individual status is more important than proximity.
Research23.4 mi
Sharpless Dredge - Plant
Mineral resource occurrence
USGS ResearchResearch28.0 mi
Old Long Quarry
Mineral resource occurrence
USGS ResearchResearch30.2 mi
Cedar River Geology Research
Devonian bedrock, fossils and river gravels
Core atlasResearch30.6 mi
Anamosa Mines
Lead, Zinc
USGS ResearchResearch32.3 mi
Cedar Valley Group Fossil Research
Devonian limestone, corals, brachiopods and crinoids
Core atlasIowa rockhounding inventory
4,264total source records
317Ready, including conditions
3,862historical USGS records
The same U.S. inventory supplies the national map, the United States view on the global map, state maps and location guides. All 24 historical-record batches are included. Ready totals include Ready with conditions for the stated activity; read the individual conditions. A documented historical record with current access details pending says Update coming soon.
Source screening is not a field inspection or collecting permission. Materials, feature details, location guides and navigation options remain attached to individual records. Local and material-specific lists can be smaller than the complete inventory.