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:
Grass Flat, Port Wine District, Sierra Co., California, USA

mindat Locality ID: 269552
mindat URL: http://www.mindat.org/loc-269552.html

Tectonic Settings:

Total number of sublocalities beneath "Grass Flat, Port Wine District, Sierra Co., California, USA": 9
Total number of bottom-level sublocalities: 9

Number of Child Localities: 9
Child Localities:
Challenge Placer (Port Wine Consolidated; Port Wine Cons; Riffle; Comet)
Gardner's Point Mine (unidentified Working)
Golden Eva Mine
Highland Mary Occurrence
Monumental Mine
Pacific Group (Roscoe; Excelsior; Jenny Lind; Constitution; Drednaught Keystone)
Pioneer Placer (Oriole; Wildrose)
Suffolk Drift Mine
West Point-Wahoo Occurrence (West Point-Monte Cristo Groups)

Latitude: 39°40'27"N
Longitude: 120°55'4"W
Decimal Degree (lat, lon): 39.674166666667,-120.91777777778

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.

Clay	Copper	None	Stilpnomelane

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: Au Ca H K Mg Mn Na O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Clay Copper None Stilpnomelane

2 IMA Minerals at location:

Gold ()*	Parsettensite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Gold ()*	Copper	Au			5	177781,177782,177785,177787,177788	30554
Parsettensite ()*	Stilpnomelane Clay	(K,Na,Ca)_7.5(Mn,Mg)₄₉Si₇₂O₁₆₈(OH)₅₀·nH₂O			1	177785	43

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...