Maryland has 570 records of mineral deposits listed by the United States Geological Survey (USGS).
Mining Geology (USGS)
Maryland has 570 identified deposits listed in The Diggings™. The most commonly listed primary commodities in Maryland deposits are iron, feldspar, and gold. At the time these deposits were surveyed, 7 deposits in Maryland were observed to have ore mineralization in an outcrop, shallow pit, or isolated drill hole—known as an occurance deposit.1 Maryland has 27 prospect deposits.2 Baltimore, Howard, and Frederick are the with the most deposits.
Quick USGS Facts
- 570 records of mineral deposits in Maryland.
- 27 records of prospects
- 7 records of mineral occurrences of observable ore mineralization.
- 21 records of mining plants
- 9 records of mineral producers
- 505 records of past producers
- 1 of unknown records
Deposits By County
1 Grade, tonnage, and extent of mineralization for such deposits are unspecified.
2 Such deposits have some degree of development such as surface trenching, adits, shafts, drill holes, geophysics, geochemistry, or geological mapping to estimate grade and tonnage.
Mining Claim News From The Diggings™
Learn more about the Bureau of Land Management, Public Land Survey System, and mining claims.
Understanding Claim Ownership
We receive lots of emails from people who find their name or a relative’s name on our site and want to know if this means they have some right to the land listed under that name.
Understanding BLM Administrative Areas
Wether it is filing a mine or researching one, the administering BLM office is going to be the definitive source.
Understanding Location Data
Mine handled by the Bureau of Land Management are not mapped by latitude and longitude, instead, these mines harken back to the Public Land Survey System.
A “township” can refer to two different things. Both are part of the PLSS measurement system but have different uses.