Burlington County: Jasper & Stripped Agate Rockhounding in Burlington County, New Jersey

Plan your visit

Generally open to casual rockhounding

County

Burlington County

State

New Jersey

Nearest road

West Avenue Nature Trails

Postcode

08010

Coordinates

40.06504, -74.93544

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 Burlington County

Comfortable months (45 to 90°F highs)

Best months: February to December. Typical highs run 89°F in midsummer and 42°F in midwinter, with winter lows near 27°F.

Climate normals: NOAA 1991-2020 monthlies, NE PHILA AP station (4 mi away).

Geology at Burlington County

This spot sits on Potomac Formation, unit 3, mapped as sand and clay that formed roughly 100 to 94 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

Potomac Formation, unit 3

Age

100–94 Ma (Late Cretaceous)

Rock types

sand and clay

Elevation

0 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.

• New Jersey Geological and Water Survey
• Monmouth County Park System, fossil collecting rules
• Sterling Hill Mining Museum
• Community submissions reviewed against published agency rules