Marple: Amethyst & Quartz Rockhounding in Delaware County, Pennsylvania

Updated June 2026

Marple is a mapped rockhounding spot in Delaware County, Pennsylvania. Reported finds include amethyst, quartz. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Delaware County
State: Pennsylvania
Nearest road: South Feathering Lane
Postcode: 19065
Coordinates: 39.93801, -75.41621

Geology at Marple

This spot sits on Wissahickon Formation, mapped as mica schist that formed roughly 540 to 250 million years ago. Metamorphic terrain like this typically carries quartz veins and sweats, and weathered crystals tend to end up in the soils and streams below.

Mapped unit: Wissahickon Formation
Age: 540–250 Ma (Paleozoic)
Rock types: mica schist
Elevation: 170 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 Marple

Best months: February to December. Typical highs run 88°F in midsummer and 42°F in midwinter, with winter lows near 26°F.

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

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 Marple

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

Nearby rockhounding spots

Other rockhounding spots within driving distance of Marple.

Across the state line from Marple

Marple is close enough to the Pennsylvania border that the next-closest rockhounding spots are in a neighboring state. Worth knowing if you are already on the road.

Marple FAQ

Where is Marple?+

Marple is in Delaware County, Pennsylvania, at 39.93801, -75.41621. Nearest road: South Feathering Lane.

What rocks and minerals can you find at Marple?+

Marple is reported to produce Amethyst, Quartz.

Is collecting allowed at Marple?+

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. Always confirm current rules with the managing agency before a trip.

What tools should I bring to Marple?+

A rock hammer, a small pry bar, gloves, and safety glasses cover most crystal ground. A screen helps in loose pocket soil, and newspaper protects points on the way out.

When is the best time to visit Marple?+

The most comfortable months at Marple are February to December.

How do I get to Marple?+

Open the directions link to navigate to 39.93801, -75.41621 in Google Maps. The nearest road is South Feathering Lane.

More rockhounding in Pennsylvania

See all 88 Pennsylvania spots →

Open Marple on the map

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