RockWoof
Check access before you go. Most sites listed here are old mines, quarries or prospects, and many are on private land or active mining claims. Get the landowner's permission, check the rules of the agency that manages any public land, and never enter mine workings. Locations are approximate.

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St. Clair Salt Mine (Producer)Morton Salt Co--Marysville, Mich. (Past Producer)Morton Salt Co--Port Huron, Mich. (Past Producer)Diamond Crystal Salt Company (Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
4 paw pins, one per site. Hover or tap a pin for the site name. 1 site(s) with USGS coordinates outside the outline are not pinned. County outline: US Census Bureau cartographic boundary file (2023). Locations approximate.

Field cards: what kind of sites?

3
Past Producer

Produced ore or material at some point in the past.

2
Producer

Was producing when the record was made.

Status terms come from USGS MRDS records.

Minerals recorded here

Halite 1

Commodities

Salt 4Halite 1

Sites

SiteCommodityMinerals recordedStatusApprox. location
St. Clair Salt MineHaliteHaliteProducer42.784, -82.490
Morton Salt Co--Marysville, Mich.Salt—Past Producer42.928, -82.460
Diamond Crystal Salt CompanySalt—Producer42.844, -82.478
Port Huron Salt Co.Salt—Past Producer42.470, -82.925
Morton Salt Co--Port Huron, Mich.Salt—Past Producer42.923, -82.473

Fossil collections

The Paleobiology Database lists 3 fossil collection records in St. Clair County. These are research records, not public dig sites.

Nearby counties

Macomb County · Oakland County · Wayne County · Lapeer County · Tuscola County

Michigan mineral guides

Back to all Michigan counties.

Related articles

How we built this page: we counted named sites in the USGS Mineral Resources Data System (MRDS) for this area, left out sand, gravel, crushed stone, clay pits and unnamed sites, grouped them by Census county, and linked every site to its USGS record. We did not visit these sites, and MRDS does not tell you who owns the land or whether collecting is allowed.

Source: USGS Mineral Resources Data System (MRDS). USGS ceased systematic updates to MRDS around 2011, so status and details may be out of date. Each site links to its USGS record.

Updated