Fullerton: Agate & Petrified Wood Rockhounding in Nance County, Nebraska

Quick details

Access

Public area

County

Nance County

State

Nebraska

Coordinates

41.35294, -97.95145

Geology at Fullerton

This spot sits on Ogallala Group or Formation, mapped as siltstone mudstone and conglomerate sandstone that formed roughly 23 to 5 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

Ogallala Group or Formation

Age

23–5 Ma (Miocene)

Rock types

siltstone mudstone and conglomerate sandstone

Elevation

1,610 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.

Best time to visit Fullerton

Best months: March to November. Typical highs run 85°F in midsummer and 34°F in midwinter, with winter lows near 13°F.

Climate normals: NOAA 1991-2020 monthlies, GENOA 2 W station (12 mi away).

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.

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.

Sources: RockHoundR public spot dataset, app land overlays, and local agency review before each trip.

Found at Fullerton

Each chip opens all spots that produce that material; the encyclopedia link opens the full ID and field guide.

• AgateEncyclopedia →
• Petrified WoodEncyclopedia →