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:
Redwood City, San Mateo Co., California, USA


mindat Locality ID: 211030
mindat URL: http://www.mindat.org/loc-211030.html

Tectonic Settings:

Total number of sublocalities beneath "Redwood City, San Mateo Co., California, USA": 8
Total number of bottom-level sublocalities: 8

Number of Child Localities: 8
Child Localities:
Challenge Deposit
Farm Hill No. 2 Mine (Emerald Lake Mine; Upper Emerald Lake Deposit; Farm Hill Cinnabar Property)
Kaiser Gypsum Mine
McGarvey Ranch Occurrence
Redwood City Operation Mine (Redwood City Mine)
Redwood Quicksilver Prospect
Unnamed Hg Occurrence [3]
Unnamed Lawsonite Occurrence [1]

Latitude: 37°28'34"N
Longitude: 122°14'1"W
Decimal Degree (lat, lon): 37.476111111111,-122.23361111111
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe 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.

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: Ag Al C Ca Cl Cr Fe H Hg Mg N Na O S Se Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleCalciteCopperGypsumLawsoniteNoneQuartzRocksaltSphaleriteSpinel

22 IMA Minerals at location:
Calcite  (*)Calomel  (*)Cinnabar  (*)Dolomite  (*)Edgarbaileyite  (*)
Eglestonite  (*)Glaucophane  (*)Gypsum  (*)Halite  (*)Lawsonite  (*)
Magnesiochromite  (*)Magnetite  (*)Mercury  (*)Metacinnabar  (*)Montroydite  (*)
Mosesite  (*)Quartz  (*)Silver  (*)Terlinguaite  (*)Tiemannite  (*)
Tunisite  (*)Wattersite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Calcite  (*)CalciteCa(CO3)117579227770
Calomel  (*)NoneHgCl3175792,175793,17579891
Cinnabar  (*)NoneHgS4175792,175793,175795,1757982600
Dolomite  (*)NoneCaMg(CO3)211757929895
Edgarbaileyite  (*)NoneHg1+6Si2O711757926
Eglestonite  (*)None([Hg1+]2)3OCl3(OH)3175792,175793,17579836
Glaucophane  (*)Amphibole   Na2(Mg3Al2)Si8O22(OH)21175799286
Gypsum  (*)GypsumCa(SO4)·2H2O11757946890
Halite  (*)RocksaltNaCl11757961398
Lawsonite  (*)LawsoniteCaAl2(Si2O7)(OH)2·H2O1175799121
Magnesiochromite  (*)SpinelMgCr2O42175792,175793311
Magnetite  (*)SpinelFe2+Fe3+2O4117579214899
Mercury  (*)NoneHg4175792,175793,175795,175798397
Metacinnabar  (*)SphaleriteHgS2175792,175793255
Montroydite  (*)NoneHgO3175792,175795,17579829
Mosesite  (*)None(Hg2N)Cl11757926
Quartz  (*)QuartzSiO2117579261156
Silver  (*)CopperAg11757965186
Terlinguaite  (*)NoneHg2OCl2175792,17579322
Tiemannite  (*)SphaleriteHgSe117579283
Tunisite  (*)NoneNaCa2Al4(CO3)4(OH)8Cl11757925
Wattersite  (*)NoneHg1+4Hg2+O2(CrO4)2175792,1757933


No ages have been assigned to this locality yet.
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