Erie: Geode Digging in Wabash County, Indiana

Quick details

Access

Public area

County

Wabash County

State

Indiana

Coordinates

40.78399, -85.89883

Geology at Erie

This spot sits on Wabash Formation, mapped as limestone and dolostone that formed roughly 445 to 420 million years ago. Limestone country like this is classic geode ground: cavities in the carbonate rock can line themselves with quartz or calcite crystals.

Mapped unit

Wabash Formation

Age

445–420 Ma (Silurian)

Rock types

limestone and dolostone

Elevation

660 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 Erie

Best months: March to November. Typical highs run 85°F in midsummer and 34°F in midwinter, with winter lows near 18°F.

Climate normals: NOAA 1991-2020 monthlies, WABASH station (4 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 Erie

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

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