Jefferson County: Calcite Nodules & Sphalerite Rockhounding in Jefferson County, Missouri

Quick details

Access

Public area

County

Jefferson County

State

Missouri

Nearest road

Veterans Memorial Highway

Postcode

63010

Coordinates

38.46223, -90.42060

Geology at Jefferson County

This spot sits on ground mapped as limestone that formed roughly 360 to 325 million years ago. Carbonate rock like this is the classic host for lead, zinc, and fluorite mineralization, which typically follows old cavities and replacement zones.

Age

360–325 Ma (Mississippian)

Rock types

limestone

Elevation

400 ft

Geologic mapping via Macrostrat and the underlying state geological survey maps (CC BY 4.0). Bedrock at the surface can vary within a mapped unit.

Land & collecting status

Generally open to casual rockhounding

Most public-tagged spots sit on BLM, U.S. Forest Service, or other federal land where reasonable hand collecting of common rocks and minerals is allowed. Confirm posted rules and active mining claims before you dig.

Public-land rules vary by agency, season, and field office. The RockHoundR app pulls live BLM, USFS, NPS, and tribal overlays so you can see exactly which agency manages the ground at this spot.

Sources & verification

Spot details combine the public RockHoundR location dataset, normalized mineral labels, agency land-status checks in the app, and community submissions. Coordinates are approximate until verified in the field.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Jefferson County

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

• Calcite NodulesEncyclopedia →
• SphaleriteEncyclopedia →