Niota: Fossil Hunting in Hancock County, Illinois

Plan your visit

Generally open to casual rockhounding

County

Hancock County

State

Illinois

Nearest road

North Morman Springs Road

Postcode

52627

Coordinates

40.61181, -91.30650

Coordinates are approximate. Confirm the exact ground in the RockHoundR app, where land overlays show which agency manages the area.

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.

Access note: Park at public road bridges and work the creek channel, collecting loose geodes from the streambed rather than digging into private banks or entering posted farmland without permission. Late summer and early fall bring the lowest water and the most exposed gravel. Hancock County, west-central Illinois.

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.

Best time to visit Niota

Comfortable months (45 to 90°F highs)

Best months: March to November. Typical highs run 85°F in midsummer and 33°F in midwinter, with winter lows near 17°F.

Climate normals: NOAA 1991-2020 monthlies, FT MADISON station (2 mi away).

Geology at Niota

This spot sits on Meppen Limestone, Fern Glen Formation, and Burlington-Keokuk Limestone, mapped as limestone that formed roughly 360 to 330 million years ago. Limestone like this typically forms in ancient seas, so marine fossils such as brachiopods, corals, and crinoids tend to weather out of fresh exposures.

Mapped unit

Meppen Limestone, Fern Glen Formation, and Burlington-Keokuk Limestone

Age

360–330 Ma (Mississippian)

Rock types

limestone

Elevation

560 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.

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.

• Illinois State Geological Survey
• Illinois DNR site rules
• Shawnee National Forest
• Community submissions reviewed against published agency rules