Research1.8 mi
Portland Quarry
Mineral resource occurrence
USGS ResearchIOWA LOCAL FIELD REGION
North-Central Fossil Preserves Rockhounding Guide
Managed preserve contexts where collection rules differ sharply by exact site.
LOCAL INTERACTIVE MAP
North-Central Fossil Preserves 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 North-Central Fossil Preserves
The records below may represent collecting sites, managed programs, protected resources or research-only geology. Their individual status is more important than proximity.
Research3.6 mi
Lime Creek Formation Fossil Research
Devonian marine fossils, shale and limestone
Core atlasResearch6.0 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch6.6 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch7.0 mi
Blum Pit
Mineral resource occurrence
USGS ResearchResearch10.3 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch10.8 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch11.8 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch14.1 mi
Clear Lake Sand & Gravel Pit
Mineral resource occurrence
USGS ResearchResearch18.9 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch19.4 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch21.6 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch23.4 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch27.9 mi
Hurd Pit
Mineral resource occurrence
USGS ResearchResearch28.8 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch29.2 mi
Geneva
Mineral resource occurrence
USGS ResearchResearch30.4 mi
Boevers Pit
Mineral resource occurrence
USGS ResearchResearch30.7 mi
Boise Quarry
Mineral resource occurrence
USGS ResearchResearch30.9 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch31.7 mi
Rattlesnake Quarry
Mineral resource occurrence
USGS ResearchResearch35.2 mi
Des Moines Lobe Glacial Geology Research
glacial till, erratics, sand and gravel
Core atlasResearch35.2 mi
Glacial Drift / Lake Superior Agate Research
glacially transported agate, quartz and erratics
Core atlasResearch36.3 mi
Neymeyer Quarry
Mineral resource occurrence
USGS ResearchResearch37.0 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch38.0 mi
Occurrence
Barite
USGS ResearchResearch38.4 mi
Shell Rock Quarry
Mineral resource occurrence
USGS ResearchResearch40.8 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch46.5 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch47.2 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch47.3 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch48.5 mi
Brandt-St Pit
Mineral resource occurrence
USGS ResearchResearch50.2 mi
Busta Pit
Mineral resource occurrence
USGS ResearchResearch53.5 mi
Grundy Center Pit
Mineral resource occurrence
USGS ResearchIowa 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.