Conditional76.0 mi
Iowa Private Quarry / Gravel Pit Collecting Context
agates, quartz, fossils, calcite, glacial erratics and aggregate specimens
Core atlasIOWA CITY ROCKHOUNDING HUB
Rockhounding Near Mason City, Iowa
Mason City is the north-central hub for Lime Creek fossils, Rockford and public fossil-preserve context.
53records within 80 mi
10core atlas
43USGS Research
0Ready
2Conditional
LOCAL INTERACTIVE MAP
Rockhounding map near Mason City
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.
What is this area strongest for?
This hub uses Mason City as a geographic base, while the material mix is calculated from the records actually mapped around it.
Field regions around Mason City
Nearby records worth opening individually
Records are ordered by evidence status first, then distance. Open the detailed guide before treating any pin as a trip destination.
Conditional76.0 mi
Iowa Roadcut / Roadside Geology Context
bedrock, fossils, glacial erratics and mineral occurrences
Core atlasResearch0.4 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch4.6 mi
Portland Quarry
Mineral resource occurrence
USGS ResearchResearch4.7 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch7.5 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch8.6 mi
Clear Lake Sand & Gravel Pit
Mineral resource occurrence
USGS ResearchResearch9.8 mi
Lime Creek Formation Fossil Research
Devonian marine fossils, shale and limestone
Core atlasResearch10.6 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch13.0 mi
Blum Pit
Mineral resource occurrence
USGS ResearchResearch18.1 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch23.8 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch25.1 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch25.6 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch27.9 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch32.9 mi
Des Moines Lobe Glacial Geology Research
glacial till, erratics, sand and gravel
Core atlasResearch32.9 mi
Glacial Drift / Lake Superior Agate Research
glacially transported agate, quartz and erratics
Core atlasResearch33.0 mi
Geneva
Mineral resource occurrence
USGS ResearchResearch34.2 mi
Hurd Pit
Mineral resource occurrence
USGS ResearchResearch35.1 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch36.2 mi
Boevers Pit
Mineral resource occurrence
USGS ResearchResearch36.3 mi
Boise Quarry
Mineral resource occurrence
USGS ResearchResearch36.5 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch38.0 mi
Rattlesnake Quarry
Mineral resource occurrence
USGS ResearchResearch41.1 mi
Neymeyer Quarry
Mineral resource occurrence
USGS ResearchResearch41.3 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch44.3 mi
Occurrence
Barite
USGS ResearchResearch44.6 mi
Shell Rock Quarry
Mineral resource occurrence
USGS ResearchResearch47.1 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch51.1 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch53.0 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch53.1 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch54.8 mi
Brandt-St Pit
Mineral resource occurrence
USGS ResearchResearch55.3 mi
Busta Pit
Mineral resource occurrence
USGS ResearchResearch58.8 mi
Grundy Center Pit
Mineral resource occurrence
USGS ResearchResearch61.5 mi
Brockway Quarry
Mineral resource occurrence
USGS ResearchResearch64.0 mi
Oran Pit
Mineral resource occurrence
USGS ResearchResearch65.8 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch66.2 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch67.4 mi
Unknown
Mineral resource occurrence
USGS ResearchResearch67.7 mi
Turner Creek Occurrence
Barite
USGS ResearchResearch69.1 mi
Pint's Quarry
Iron, Fluorite, Barite, Zinc, Lead
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.