Twenty-One Placer Mine (Twenty-One Mine; Placer 21; 21 Placer Mine), Iowa Hill, Iowa Hill Mining District, Placer County, California, USAi
| Regional Level Types | |
|---|---|
| Twenty-One Placer Mine (Twenty-One Mine; Placer 21; 21 Placer Mine) | Mine |
| Iowa Hill | Hill |
| Iowa Hill Mining District | Mining District |
| Placer County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
39° 4' 57'' North , 120° 50' 31'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Foresthill | 1,483 (2011) | 7.2km |
| Colfax | 2,005 (2017) | 9.8km |
| Dutch Flat | 160 (2011) | 13.7km |
| Alta | 610 (2011) | 14.0km |
| Meadow Vista | 3,217 (2011) | 18.0km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 24km |
| El Dorado County Mineral and Gem Society | Placerville, California | 39km |
| Gold Country Treasure Seekers | Placerville, California | 39km |
A former placer Au-Ag occurrence/hydraulic mine located in secs. 3, 9 & 10, T14N, R10E, MDM, about 3 km E of Kings Hill and about 3.3 km (2 miles) SSE of Iowa Hill on the eastern ridge of New York Canyon. MRDS database accuracy for this location is not stated. The geographic coordinates presented in this Mindat file were adjusted to correspond exactly with the named mine symbol on the topo map. This location appears on the topo map as the "21 Placer Mine."
Local rocks include undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided) and/or Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
Workings include unspecified underground openings (?).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au Description: Placer material. Apparently somewhat argentiferous. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060611007 & 0060610321
Hobson, John B. (1890), Nevada, Placer, Siskiyou Counties: California In. Bureau Report 10: 364-398.
