Summerville: Agate & Chalcedony Rockhounding in Chattooga County, Georgia

Plan your visit

Generally open to casual rockhounding

County

Chattooga County

State

Georgia

Nearest road

Martha Berry Highway

Postcode

30747

Coordinates

34.47021, -85.31702

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.

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 Summerville

Comfortable months (45 to 90°F highs)

Conditions here are workable year-round, with typical highs from 51°F in winter to 89°F in summer.

Climate normals: NOAA 1991-2020 monthlies, SUMMERVILLE station (4 mi away), adjusted for elevation.

Geology at Summerville

This spot sits on Knox Group undifferentiated, mapped as dolostone that formed roughly 540 to 445 million years ago. Chert and agate nodules typically form inside carbonate rock like this and weather out as tough, waxy lumps in soils and creek beds.

Mapped unit

Knox Group undifferentiated

Age

540–445 Ma (Cambrian to Ordovician)

Rock types

dolostone

Elevation

850 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.

• Georgia Environmental Protection Division, Geologic Survey
• Chattahoochee-Oconee National Forests
• Georgia State Parks rules
• Community submissions reviewed against published agency rules