Manlius: Fluorite Rockhounding in Onondaga County, New York

Quick details

Access

Public area

County

Onondaga County

State

New York

Nearest road

East Seneca Turnpike

Postcode

13078

Coordinates

42.99660, -76.02613

Geology at Manlius

This spot sits on Onondaga Limestone, mapped as limestone that formed roughly 410 to 390 million years ago. Carbonate rock like this is the classic host for lead, zinc, and fluorite mineralization, which typically follows old cavities and replacement zones.

Mapped unit

Onondaga Limestone

Age

410–390 Ma (Early Devonian to Middle Devonian)

Rock types

limestone

Elevation

700 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 Manlius

Best months: April to November. Typical highs run 81°F in midsummer and 31°F in midwinter, with winter lows near 15°F.

Climate normals: NOAA 1991-2020 monthlies, SYRACUSE HANCOCK INTL AP station (9 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 Manlius

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

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