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:
Cerro Alto, Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA

Oldest recorded age at locality: 163
Youngest recorded age at locality: 163

mindat Locality ID: 224919
mindat URL: http://www.mindat.org/loc-224919.html

Tectonic Settings:

Total number of sublocalities beneath "Cerro Alto, Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA": 32
Total number of bottom-level sublocalities: 31

Number of Child Localities: 31
Child Localities:
Alfred H. Ruedy Chrome Prospect
Barbara Claim
Captian Deposit
Chromic Acid No. 1 Claim (High Grade Claim)
Chromic Acid No. 2 Claim
Colonel Deposit
Eagle Claim
Eucalyptus No. 1 Claim (Eucalyptus Mine)
Eucalyptus No. 2 Deposit
Eureka Claim (Leslie Elberg Claim)
Florence Claim
Hard Face Chromite Mine (Sunrise No. 2; Bluebird; Old Smoky)
Hobson Claims
Leitner Claim
Little Bend Group (Little Band Group)
Moonbeam No. 1 Deposit
Mountain View Deposit
Norcross Mine (West Norcross Mine; Brooklyn Mine; Manzanita; Biaggini Mine; Norcross Chrome Mine; Sunrise No. 3 Claim; Victory No. 3 Claim; Bernardo No. 3 Claim)
North Star Claims
San Ramon Mine (San Remon Claims Nos. 1; 2; 3; & 4)
Schweider And McCles Claim
Silver Swan Mine (Lonestar And Fern Mine)
Spring Creek Chrome Prospect
Starlight Cr Occurrence
Sunrise No. 1 Prospect
Sunrise Nos. 1 And 2 Deposits
Sweetwater Mine (San Juan Mine; Pierce And Benadom Group)
Sweetwater-Norcross Group
Tassajara Group (Tassajero Group)
Unnamed Cr Property (4)
Vulture Cr Occurrence

Latitude: 35°24'53"N
Longitude: 120°44'57"W
Decimal Degree (lat, lon): 35.414722222222,-120.74916666667

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.

Amphibole	Aragonite	Calcite	Clay	None	Serpentine	Spinel	Talc

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: Al C Ca Cr Fe H Mg O Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amphibole Aragonite Calcite Clay None Serpentine Spinel Talc

9 IMA Minerals at location:

Antigorite ()*	Aragonite ()*	Calcite ()*	Chromite ()*	Hercynite ()*
Magnesiochromite ()*	Spinel ()*	Talc ()*	Tremolite ()*

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
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	163	163	1	175592	708
Aragonite ()*	Aragonite	Ca(CO₃)	163	163	1	175583	3250
Calcite ()*	Calcite	Ca(CO₃)	163	163	1	175583	27770
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	163	163	15	175568,175569,175570,175571,175572,175574,175575,175579,175581,175582,175583,175589,175591,175594,175597	3902
Hercynite ()*	Spinel	Fe²⁺Al₂O₄	163	163	1	175592	407
Magnesiochromite ()*	Spinel	MgCr₂O₄	163	163	2	175583,175592	311
Spinel ()*	Spinel	MgAl₂O₄	163	163	1	175592	1934
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	163	163	1	175583	3337
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	163	163	1	175583	2562

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
podchrome-00011	163	163	Middle Jurassic (163.3±1.1 Ma, U-Pb apatite-feldspar isochron in gabbro)	Cr	91918	Norcross Mine (West Norcross Mine; Brooklyn Mine; Manzanita; Biaggini Mine; Norcross Chrome Mine; Sunrise No. 3 Claim; Victory No. 3 Claim; Bernardo No. 3 Claim), Cerro Alto, Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA	Norcross	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00014	163	163	Middle Jurassic (163.3±1.1 Ma, U-Pb apatite-feldspar isochron in gabbro)	Cr	91918	Norcross Mine (West Norcross Mine; Brooklyn Mine; Manzanita; Biaggini Mine; Norcross Chrome Mine; Sunrise No. 3 Claim; Victory No. 3 Claim; Bernardo No. 3 Claim), Cerro Alto, Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA	Victory No. 3	Moiser et al. (2012)	USGSSIR2012_5157
podchrome-00013	163	163	Middle Jurassic (163.3±1.1 Ma, U-Pb apatite-feldspar isochron in gabbro)	Cr	91994	Sweetwater Mine (San Juan Mine; Pierce And Benadom Group), Cerro Alto, Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA	Sweetwater	Moiser et al. (2012)	USGSSIR2012_5157

All locality data graciously provided by mindat.org

All age data...