Coon Hollow Mine (Coon Hollow Hydraulic Mine; Coon Hollow placer; Coon Hollow and Excelsior), Coon Hollow, Placerville (Hangtown), Placerville Mining District, El Dorado County, California, USAi
| Regional Level Types | |
|---|---|
| Coon Hollow Mine (Coon Hollow Hydraulic Mine; Coon Hollow placer; Coon Hollow and Excelsior) | Mine |
| Coon Hollow | - not defined - |
| Placerville (Hangtown) | - not defined - |
| Placerville Mining District | Mining District |
| El Dorado County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
38° 43' 5'' North , 120° 48' 31'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Placerville | 10,650 (2017) | 1.6km |
| Diamond Springs | 11,037 (2011) | 2.7km |
| Deer Park | 1,384 (2018) | 4.2km |
| Cold Springs | 446 (2011) | 6.0km |
| Coloma | 529 (2011) | 11.5km |
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 |
|---|---|---|
| El Dorado County Mineral and Gem Society | Placerville, California | 2km |
| Gold Country Treasure Seekers | Placerville, California | 2km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 36km |
| Roseville Rock Rollers | Roseville, California | 42km |
| Fossils for Fun Society, Inc. | North Highlands, California | 49km |
Mindat Locality ID:
135057
Long-form identifier:
mindat:1:2:135057:2
GUID (UUID V4):
034103f1-3668-4a25-95aa-10944d0dea1d
A former placer Au occurrence/drift & hydraulic mine and silica deposit (tailings processing for aggregate) located in sec. 18 and in the NW¼ sec. 19, T10N, R11E, MDM, 0.1 km (0.1 mile) SW of Coon Hollow (coordinates of record), S of Sacramento Hill and about 2.6 km SW of Placerville center (1 mile S), on private land. Discovered in 1852. Property was comprised of 70 acres. Drifted from 1852 to 1861 and hydraulicked from 1861 to 1871. Operated post-mining for silica/gravel by the Harms Brothers Construction Co. MRDS database stated accuracy for this location is 500 meters. The Coon Hollow claim is shown in the SW¼ sec. 18 (Logan (1938), Pl. II).
Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains) and/or Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include surface openings/operations. Mine tailings were being worked for aggregate subsequent to closure.
Au output from this area totaled $10,000,000 (period values). The gravel yielded about $1 per cubic yard.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Gold Formula: Au Description: Placer material. |
| ⓘ Maldonite Formula: Au2Bi Description: Founf in 1899 and represented by CDMG specimen #15391. 60% Au & 40% Bi. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Maldonite | 2.AA.40 | Au2Bi |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Gold | Au |
| Au | ⓘ Maldonite | Au2Bi |
| Bi | Bismuth | |
| Bi | ⓘ Maldonite | Au2Bi |
Other Databases
| Link to USGS MRDS: | 10030197 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
USA
- California
- Mother Lode BeltBelt
- 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 #0060170764 & 0060170766
