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

Skaggs Ore Bank + 4 more nearby (Past Producer)Kirwan Ore Bank + 1 more nearby (Past Producer)Donaldson Ore Banks (Past Producer)Northwest Contee Ore Banks + 1 more nearby (Past Producer)Hooff Ore Bank + 4 more nearby (Past Producer)Duvall Ore Banks + 5 more nearby (Past Producer)Mason Ore Banks (Past Producer)Hedgman Ore Banks (Prospect)Shriver Ore Bank (Past Producer)John Sadilek Ore Banks + 2 more nearby (Past Producer)Dower House Road Plant + 1 more nearby (Past Producer)Jones Ore Bank (Past Producer)Unnamed Sandstone Quarry (Past Producer)
Past ProducerProducerProspectOccurrenceStatus unknown
13 paw pins; nearby sites are grouped into one pin. 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?

30
Past Producer

Produced ore or material at some point in the past.

1
Prospect

Explored or test-dug, with no recorded production.

1
Plant

A processing plant site.

Status terms come from USGS MRDS records.

Minerals recorded here

Granite 1

Commodities

Iron 29Granite 2Flagstone 1

Sites

SiteCommodityMinerals recordedStatusApprox. location
Dower House Road PlantGraniteGranitePast Producer38.810, -76.846
Skaggs Ore BankIron—Past Producer38.994, -76.926
Reed Ore BankIron—Past Producer38.999, -76.921
Hedgman Ore BanksIron—Prospect38.996, -76.879
Hooff Ore BankIron—Past Producer39.073, -76.866
John Sadilek Ore BanksIron—Past Producer39.054, -76.839
Duvall Ore BanksIron—Past Producer39.054, -76.871
Allan Ore BanksIron—Past Producer39.073, -76.856
Green Ore BanksIron—Past Producer39.044, -76.862
Joseph Sadilek Ore BankIron—Past Producer39.046, -76.840
Unnamed Sandstone QuarryFlagstone—Past Producer38.979, -76.755
California Ore BanksIron—Past Producer39.069, -76.876
Mason Ore BanksIron—Past Producer39.029, -76.881
Roberts Ore BankIron—Past Producer39.062, -76.865
Haker Ore BankIron—Past Producer39.042, -76.835
Reed Ore BankIron—Past Producer38.999, -76.921
Donaldson Ore BanksIron—Past Producer39.032, -76.882
Tyson Ore BanksIron—Past Producer39.051, -76.861
Kirwan Ore BankIron—Past Producer39.084, -76.888
Dower House Road PlantGranite—Plant38.810, -76.845
Nicholson Ore BankIron—Past Producer39.081, -76.885
O'Brien Ore BanksIron—Past Producer39.070, -76.869
Northwest Contee Ore BanksIron—Past Producer39.079, -76.879
Milbrook Ore BankIron—Past Producer39.057, -76.864
Swampoodle Ore BanksIron—Past Producer39.086, -76.868
Buck Ore BankIron—Past Producer39.005, -76.919
Skaggs Ore BankIron—Past Producer38.994, -76.926
Friel Ore BankIron—Past Producer39.050, -76.864
Shriver Ore BankIron—Past Producer39.066, -76.855
Ashland Ore BankIron—Past Producer39.039, -76.859
Jones Ore BankIron—Past Producer39.014, -76.818
Hedgman Ore BanksIron—Past Producer38.097, -76.860

Fossil collections

The Paleobiology Database lists 30 fossil collection records in Prince George's County. These are research records, not public dig sites.

Nearby counties

Anne Arundel County · Montgomery County · Howard County · Baltimore city · Baltimore County

Maryland mineral guides

Back to all Maryland 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