Quarry: Fossil Hunting in Grand Isle County, Vermont

Updated June 2026

Quarry is a mapped rockhounding spot in Grand Isle County, Vermont. Reported finds include marcasite, fossils, gastropods. Below: coordinates, access notes, nearby spots, and trip-planning links.

Quick details

Access: Public area
County: Grand Isle County
State: Vermont
Nearest road: Summit Road
Postcode: 05440
Coordinates: 44.90594, -73.29845

Geology at Quarry

This spot sits on Stony Point Formation, mapped as shale and limestone that formed roughly 460 to 445 million years ago. Limestone like this typically forms in ancient seas, so marine fossils such as brachiopods, corals, and crinoids tend to weather out of fresh exposures.

Mapped unit: Stony Point Formation
Age: 460–445 Ma (Late Ordovician)
Rock types: shale and limestone
Elevation: 140 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 Quarry

Best months: April to November. Typical highs run 82°F in midsummer and 28°F in midwinter, with winter lows near 10°F.

Climate normals: NOAA 1991-2020 monthlies, CHAZY station (5 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 Quarry

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 Quarry.

Across the state line from Quarry

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

Quarry FAQ

Where is Quarry?+

Quarry is in Grand Isle County, Vermont, at 44.90594, -73.29845. Nearest road: Summit Road.

What rocks and minerals can you find at Quarry?+

Quarry is reported to produce Marcasite, Fossils, Gastropods.

Is collecting allowed at Quarry?+

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 Quarry?+

A rock hammer, a cold chisel, safety glasses, and newspaper or foam for wrapping finds cover most fossil ground. A trowel and a sieve help in soft exposures.

When is the best time to visit Quarry?+

The most comfortable months at Quarry are April to November.

How do I get to Quarry?+

Open the directions link to navigate to 44.90594, -73.29845 in Google Maps. The nearest road is Summit Road.

More rockhounding in Vermont

See all 29 Vermont spots →

Open Quarry on the map

Use the RockHoundR app for live land overlays, weather, geology, directions, and saved finds.