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:
Roach Hill, Iowa Hill District, Placer Co., California, USA

mindat Locality ID: 266268
mindat URL: http://www.mindat.org/loc-266268.html

Tectonic Settings:

Total number of sublocalities beneath "Roach Hill, Iowa Hill District, Placer Co., California, USA": 38
Total number of bottom-level sublocalities: 38

Number of Child Localities: 38
Child Localities:
Arkansas Traveler Mine
Atlas Placer
Australian Mine
Birds Flat Occurrence
Blue Channel Occurrence
Blue Wing Mine (Blue Wing Claim; Blue Wing Quartz; Wolverine Claim; Ostrom Mine; Washington Consolidated Mine; Washington Cons.)
Brunn Mine
Carey Placer
Dayton Mine
Empire Mine
Ferne Chrome Mine
Flora Dean Mine (Glencoe)
Giant Gap Claim
Golden Star Placer
Gould Mine (Gould Group)
Jeffries Placer (Live Oak)
Juno Placer Mine
Keystone Occurrence
Masonic Placer
Mohawk Mine
North Hill Placer
Oro & Mountain View Placer (Oro & Mtn View)
Penn Valley Placer Mine (Penn Valley Mine)
Placer County Properties Company Claims
Providence Mine (Providencia)
Roach Hill Quartz Mine (Roach Hill Mine)
Santa Fe Occurrence
Stockton Mine (Aurora; Columbus)
Strawberry Placer
Success Placer
Sunset & Riverside Placer
Truro Placer Mine
Unnamed Au Occurrence [50]
Unnamed Au Occurrence [51]
Unnamed Au Placer [41]
Watts Prospect
White Pine Mine
Wolverine Mine

Latitude: 39°7'40"N
Longitude: 120°49'35"W
Decimal Degree (lat, lon): 39.127777777778,-120.82638888889

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.

Calcite	Clay	Copper	None	Quartz	Serpentine

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 C H Mg O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Clay Copper None Quartz Serpentine

4 IMA Minerals at location:

Chrysotile ()*	Gold ()*	Magnesite ()*	Quartz ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	1	167265	951
Gold ()*	Copper	Au	12	167262,167265,167266,167268,167269,167271,167276,167282,167284,167285,167288,167295	30554
Magnesite ()*	Calcite	Mg(CO₃)	1	167283	1487
Quartz ()*	Quartz	SiO₂	2	167262,167284	61156

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...