Beckham County: Alabaster & Selenite Rockhounding in Greer County, Oklahoma

Plan your visit

Confirm rules before collecting

County

Greer County

State

Oklahoma

Nearest road

CR E1400

Postcode

73547

Coordinates

34.98936, -99.41463

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

Land & collecting status

Confirm rules before collecting

Land status here is not confirmed. Verify with the managing agency before collecting, federal, state, and tribal rules differ.

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 Beckham County

Comfortable months (45 to 90°F highs)

Best months: September to June. Typical highs run 94°F in midsummer and 51°F in midwinter, with winter lows near 25°F.

Climate normals: NOAA 1991-2020 monthlies, MANGUM station (8 mi away), adjusted for elevation.

Geology at Beckham County

This spot sits on Hennessey Group, mapped as shale that formed roughly 300 to 250 million years ago. Sedimentary beds like these are the typical host for petrified and silicified wood, which weathers out as durable float on slopes and in washes.

Mapped unit

Hennessey Group

Age

300–250 Ma (Permian)

Rock types

shale

Elevation

1,790 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.

• Salt Plains National Wildlife Refuge, selenite digging
• Oklahoma Geological Survey
• Ouachita National Forest
• Community submissions reviewed against published agency rules