Chesapeake & Delaware Canal: Fossil Hunting in New Castle County, Delaware

Plan your visit

Generally open to casual rockhounding

County

New Castle County

State

Delaware

Postcode

19706

Coordinates

39.55845, -75.58981

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.

Access note: The canal lands are U.S. Army Corps of Engineers property, and DNREC manages the Castle Trail. Small-scale, non-commercial surface collecting of loose fossils from spoil material has long been tolerated, but selling fossils from federal land is a federal crime, and the richest historic piles near Reedy Point are now fenced, buried under riprap and the bike path, or closed during active dredging. Do not dig into or climb the canal slopes below the riprap. Check current access with the Army Corps Philadelphia District before relying on it, and treat it as a surface-only, look-first site.

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 Chesapeake & Delaware Canal

Comfortable months (45 to 90°F highs)

Best months: March to December. Typical highs run 87°F in midsummer and 42°F in midwinter, with winter lows near 26°F.

Climate normals: NOAA 1991-2020 monthlies, WILMINGTON NEW CASTLE CO AP station (8 mi away).

Geology at Chesapeake & Delaware Canal

This spot sits on Mt. Laurel-Navesink Formation, mapped as silt and sand that formed roughly 145 to 66 million years ago. Reworked sediments like these can carry fossils eroded from older beds upstream, typically as rolled bone fragments, teeth, and shell material.

Mapped unit

Mt. Laurel-Navesink Formation

Age

145–66 Ma (Cretaceous)

Rock types

silt and sand

Elevation

30 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.

• Delaware Geological Survey
• Delaware State Parks rules
• Community submissions reviewed against published agency rules