Genoa: Calcite & Celestite Rockhounding in Ottawa County, Ohio

Plan your visit

Generally open to casual rockhounding

County

Ottawa County

State

Ohio

Nearest road

Main Street

Postcode

43430

Coordinates

41.50796, -83.35441

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 Genoa

Comfortable months (45 to 90°F highs)

Best months: March to November. Typical highs run 85°F in midsummer and 34°F in midwinter, with winter lows near 21°F.

Climate normals: NOAA 1991-2020 monthlies, TOLEDO METCALF FLD station (7 mi away).

Geology at Genoa

This spot sits on Lockport Dolomite, mapped as dolostone that formed roughly 445 to 425 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

Lockport Dolomite

Age

445–425 Ma (Llandovery to Ludlow)

Rock types

dolostone

Elevation

490 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.

• Ohio Geological Survey
• Ohio State Parks rules
• Wayne National Forest
• Community submissions reviewed against published agency rules