Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Folsom, Folsom District, Sacramento Co., California, USA

mindat Locality ID: 215844
mindat URL: http://www.mindat.org/loc-215844.html

Tectonic Settings:

Total number of sublocalities beneath "Folsom, Folsom District, Sacramento Co., California, USA": 14
Total number of bottom-level sublocalities: 14

Number of Child Localities: 14
Child Localities:
American River
American River Placer Deposit
American River Placer Mine (American River Area)
Blue Ravine Occurrence
Buckeye Flat Mining Company Mine
Evanis Mine (Broder Ranch)
Folsom Prison Mine
Gold Hill Dredging Company Mine
Gray Wing Extension Mine
Mississippi Bar Placer Mine (American River Area)
Union Wisconsin Consolidated River Occurrence (Union Wiscon River)
Unnamed Au Placer Deposits (3)
Unnamed Cr Occurrence (1)
Unspecified Quartz Occurrence (1)

Latitude: 38°40'45"N
Longitude: 121°8'44"W
Decimal Degree (lat, lon): 38.679166666667,-121.14555555556

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Copper	None	Pyrite	Quartz	Spinel

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: As Au Cr Fe Ir O Os Pt Ru S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Copper None Pyrite Quartz Spinel

10 IMA Minerals at location:

Chromite ()*	Erlichmanite ()*	Gold ()*	Irarsite ()*	Iridium ()*
Osmium ()*	Platinum ()*	Quartz ()*	Rutheniridosmine ()*	Sperrylite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	1	170029	3902
Erlichmanite ()*	Pyrite	OsS₂	1	170017	110
Gold ()*	Copper	Au	7	170018,170019,170021,170022,170024,170026,170028	30554
Irarsite ()*	Pyrite	IrAsS	1	170017	154
Iridium ()*	Copper	Ir	1	170017	162
Osmium ()*	None	Os	1	170017	169
Platinum ()*	Copper	Pt	2	170017,170026	485
Quartz ()*	Quartz	SiO₂	1	170030	61156
Rutheniridosmine ()*	None	(Ir,Os,Ru)	1	170017	47
Sperrylite ()*	Pyrite	PtAs₂	1	170017	337

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...