Where to Find Concretion in the United States
1 mapped concretion spots across 1 U.S. states. Concretion is reported at multiple rockhounding spots across the United States. The map below shows where collectors most often find it on legal public ground.
Learn about concretion: properties & identification →Map showing where to find concretion across the United States, with 1 mapped spots
Top states for concretion
States ranked by number of concretion spots in our database. States in bold link to a focused concretion-in-state list.
Every concretion spot we track
Sorted by state and county. Coordinates open in Google Maps.
| Spot | County | Minerals | Coordinates | Access |
|---|---|---|---|---|
| Rock City ParkNorth 100th Road | Ottawa County |
| 39.0927, -97.7391 | Public |
Concretion rockhounding FAQ
Where is the best place to find concretion in the U.S.?+
Kansas have the highest concentrations of concretion in this list. Each state's quality and access varies — open the linked state pages for a detailed view.
How many concretion rockhounding spots does RockHoundR track?+
1 mapped spots across 1 states. The app keeps these on a map alongside your private finds.
Can I legally collect concretion on public land?+
Casual hand collecting of common rocks and minerals like concretion is allowed on most BLM and U.S. Forest Service land, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always check with the managing agency before a trip.
How do I identify concretion in the field?+
Field identification of concretion comes down to color, hardness, fracture, and luster. The RockHoundR app links to geology details for each spot to help narrow down what you might be picking up.
Hunt concretion on the map
Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.
