Bluffton: Dolomite & Marcasite Rockhounding in Wells County, Indiana

Quick details

Access

Public area

County

Wells County

State

Indiana

Nearest road

East 200 North

Postcode

46714

Coordinates

40.76939, -85.18448

Geology at Bluffton

This spot sits on Wabash Formation, mapped as limestone and dolostone that formed roughly 445 to 420 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.

Mapped unit

Wabash Formation

Age

445–420 Ma (Silurian)

Rock types

limestone and dolostone

Elevation

730 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.

Best time to visit Bluffton

Best months: March to November. Typical highs run 83°F in midsummer and 32°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, BLUFFTON 6N station (3 mi away).

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 Bluffton

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

• DolomiteEncyclopedia →
• MarcasiteEncyclopedia →
• PyriteEncyclopedia →