The Unknown is a gold, silver, and sand and gravel, construction mine located in Adams county, Colorado.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation:
Commodity: Gold, Silver, Sand and Gravel, Construction
Lat, Long: 39.82, -104.94778
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Unknown MRDS details
Site Name
Primary: Unknown
Commodity
Primary: Gold
Primary: Silver
Primary: Sand and Gravel, Construction
Location
State: Colorado
County: Adams
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Deposit Type: Placer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Colorado Piedmont
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Gravel
Role: Host
Age Type: Host Rock
Age Young: Holocene
Analytical Data
Not available
Materials
Ore: Silver
Ore: Sand
Ore: Gold
Ore: Gravel
Comments
Comment (Production): GOLD RECOVERED BY SLUICING IN CONJUNCTION WITH SCREENING AND WASHING OF SANDS AND GRAVELS FOR CONSTRUCTION MATERIALS.
Comment (Geology): GEOL.DESC: SANDS AND GRAVELS OF STREAMS AND LOW LYING BENCHES OF CLEAR CREEK AND ITS FLOOD PLAIN
References
Reference (Deposit): USGS MIN. RES. OF U.S., 1922-1931
Reference (Deposit): USGS ARVADA COLO AND DERBY, COLO TOPO MAPS 7 1/2 MIN, 1957
Reference (Deposit): PARKER, 1961, GOLD PLACERS OF COLO., COLO. SCH. OF MINES UNPUB. DISSERTATION
Reference (Deposit): 3A) MIN. RES. OF COLO., 1960, P.60-62
Reference (Deposit): 3B) REPTS. OF COLO. BUREAU OF MINES, 1923-24, 1928-30, 1933, 1935, 1937, 1939, 1941-43, 1947, 1949, 1961
Reference (Deposit): CONSV. DIV. COMP. DATE, 4,63
Colorado Mining Photos
Check out this collection of Colorado's best historic mining photos: Incredible Photos of Colorado Mining Scenes.
