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.

Sketch map

Sweeny Sulfur Plant (Producer)Clemens Dome Mine (Past Producer)Clemens Dome (Unknown)Hoskins Mound (Unknown)Gulf Chem and Metallurgical Plant + 2 more nearby (Producer)Bryan Mound Mine (Past Producer)Manvell Salt Dome (Occurrence)Danbury Salt Dome (Occurrence)Stratton Ridge (Unknown)Stratton Ridge Mine (Past Producer)Dow Chemical Plant + 1 more nearby (Producer)Hoskins Mound Mine (Past Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
12 paw pins; nearby sites are grouped into one pin. Hover or tap a pin for the site name. 2 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?

5
Producer

Was producing when the record was made.

4
Past Producer

Produced ore or material at some point in the past.

4
Unknown

Status not recorded.

3
Occurrence

The mineral was noted here, without development.

1
Plant

A processing plant site.

Status terms come from USGS MRDS records.

Minerals recorded here

Halite 7Anhydrite 1

Commodities

Sulfur 6Halite 6Magnesite 4Vanadium 1Molybdenum 1Salt 1

Sites

SiteCommodityMinerals recordedStatusApprox. location
Hoskins Mound MineSulfurAnhydrite, HalitePast Producer29.141, -95.229
Bryan Mound MineSulfur, HaliteHalitePast Producer28.915, -95.373
Clemens Dome MineSulfurHalitePast Producer29.005, -95.568
Stratton Ridge MineHaliteHalitePast Producer29.026, -95.330
Danbury Salt DomeHaliteHaliteOccurrence29.217, -95.334
San Luis Pass Salt DomeHaliteHaliteOccurrence29.034, -95.050
Manvell Salt DomeHaliteHaliteOccurrence29.500, -95.342
Dow Chemical PlantMagnesite—Producer28.949, -95.319
Clemens DomeSulfur—Unknown28.977, -95.566
Sweeny Sulfur PlantSulfur—Producer29.047, -95.747
Hoskins MoundSulfur—Unknown29.120, -95.477
Gulf Chem and Metallurgical PlantVanadium, Molybdenum—Producer29.000, -95.375
Us Gypsum Freeport PlantMagnesite—Producer28.992, -95.367
A P Green RefractoriesMagnesite—Producer29.000, -95.375
Dow Freeport Plants A and BMagnesite—Plant28.950, -95.309
Bryan MoundHalite—Unknown28.849, -95.375
Stratton RidgeSalt—Unknown29.047, -95.348

Fossil collections

The Paleobiology Database lists 1 fossil collection records in Brazoria County. These are research records, not public dig sites.

Nearby counties

Galveston County · Wharton County · Fort Bend County · Matagorda County · Harris County

Texas mineral guides

Back to all Texas 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