Seiling & Taloga: Agate & Jasper Rockhounding in Dewey County, Oklahoma

Plan your visit

Permission required before collecting

County

Dewey County

State

Oklahoma

Nearest road

US 183

Coordinates

36.09254, -98.95259

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

Land & collecting status

Permission required before collecting

Requires landowner or agency permission before any collecting. Do not enter without explicit authorization.

Access note: Land in Dewey County is largely private, so obtain permission before collecting on ranch or farm ground. River and creek gravels can be worked from public road crossings and bridges, staying within the streambed and off private banks. Petrified wood may be collected for personal use on private land with the owner's permission.

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 Seiling & Taloga

Comfortable months (45 to 90°F highs)

Best months: September to June. Typical highs run 95°F in midsummer and 49°F in midwinter, with winter lows near 21°F. Summer heat here is intense, so carry more water than you think you need and work the early morning.

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

Geology at Seiling & Taloga

This spot sits on Rush Springs Formation, mapped as sandstone 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

Rush Springs Formation

Age

300–250 Ma (Permian)

Rock types

sandstone

Elevation

1,860 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