Cottondale Area: Chert Rockhounding in Jackson County, Florida

Plan your visit

Generally open to casual rockhounding

County

Jackson County

State

Florida

Nearest road

Peanut Road

Postcode

32431

Coordinates

30.82913, -85.40182

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: Collecting is prohibited inside Florida Caverns State Park at Marianna, so work public rights-of-way, creek banks, and publicly accessible land outside the park. Invertebrate fossils and chert need no permit; vertebrate fossils require a Florida Fossil Permit.

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 Cottondale Area

Comfortable months (45 to 90°F highs)

Best months: September to May. Typical highs run 93°F in midsummer and 64°F in midwinter, with winter lows near 39°F.

Climate normals: NOAA 1991-2020 monthlies, CHIPLEY station (9 mi away).

Geology at Cottondale Area

This spot sits on Alum Bluff Group, mapped as sand and clay that formed roughly 16 to 4 million years ago. Gravels like these concentrate whatever survives the river: agate, jasper, and other tough silica typically show up as rounded, waxy stones.

Mapped unit

Alum Bluff Group

Age

16–4 Ma (Middle Miocene to Early Pliocene)

Rock types

sand and clay

Elevation

160 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.

• Florida Geological Survey
• Florida Museum vertebrate fossil permit
• Florida State Parks rules
• Community submissions reviewed against published agency rules