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:
San Francisco Co., California, USA

mindat Locality ID: 210012
mindat URL: http://www.mindat.org/loc-210012.html

Tectonic Settings:

Total number of sublocalities beneath "San Francisco Co., California, USA": 22
Total number of bottom-level sublocalities: 14

Number of Child Localities: 4
Child Localities:
Farallon Islands
North San Francisco Quadrangle
San Francisco
San Francisco Peninsula

Latitude: 37°43'49"N
Longitude: 122°42'53"W
Decimal Degree (lat, lon): 37.730277777778,-122.71472222222

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.

Amorphous	Aragonite	Baryte	Brucite	Calcite	Clay	Copper	Epsomite	Gadolinite	Gyrolite
Hexahydrite	Hydrotalcite	Millerite	None	Pectolite	Pyrite	Pyroxene	Quartz	Serpentine	Smectite-vermiculite
Spinel	Taranakite	Wollastonite

Antigorite ()*	Aragonite ()*	Baryte ()*	Brucite ()*	Calcite ()*
Chromite ()*	Cinnabar ()*	Coalingite ()*	Datolite ()*	Diopside ()*
Enstatite ()*	Epsomite ()*	Gold ()*	Gyrolite ()*	Hexahydrite ()*
Hydromagnesite ()*	Idrialite ()*	Lizardite ()*	Magnesite ()*	Mercury ()*
Millerite ()*	Nesquehonite ()*	Nontronite ()*	Opal ()*	Pectolite ()*
Pyrite ()*	Pyroaurite ()*	Quartz ()*	Taranakite ()*	Wollastonite ()*
Xonotlite ()*

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 Au B Ba C Ca Cr Fe H Hg K Mg Na Ni O P S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amorphous Aragonite Baryte Brucite Calcite Clay Copper Epsomite Gadolinite Gyrolite
Hexahydrite Hydrotalcite Millerite None Pectolite Pyrite Pyroxene Quartz Serpentine Smectite-vermiculite
Spinel Taranakite Wollastonite

31 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	1	175253	708
Aragonite ()*	Aragonite	Ca(CO₃)	1	175253	3250
Baryte ()*	Baryte	Ba(SO₄)	1	175253	11547
Brucite ()*	Brucite	Mg(OH)₂	3	175246,175247,175264	462
Calcite ()*	Calcite	Ca(CO₃)	1	175253	27770
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	1	175260	3902
Cinnabar ()*	None	HgS	3	175248,175258,175263	2600
Coalingite ()*	Hydrotalcite	Mg₁₀Fe³⁺₂(CO₃)(OH)₂₄·2H₂O	1	175253	27
Datolite ()*	Gadolinite	CaB(SiO₄)(OH)	1	175253	498
Diopside ()*	Pyroxene	CaMgSi₂O₆	2	175246,175264	4135
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	1	175246	944
Epsomite ()*	Epsomite	Mg(SO₄)·7H₂O	1	175261	484
Gold ()*	Copper	Au	1	175252	30554
Gyrolite ()*	Gyrolite	NaCa₁₆(Si₂₃Al)O₆₀(OH)₈·14H₂O	1	175253	142
Hexahydrite ()*	Hexahydrite	Mg(SO₄)·6H₂O	1	175261	251
Hydromagnesite ()*	None	Mg₅(CO₃)₄(OH)₂·4H₂O	3	175253,175254,175259	341
Idrialite ()*	None	C₂₂H₁₄	2	175246,175250	15
Lizardite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	1	175246	359
Magnesite ()*	Calcite	Mg(CO₃)	2	175247,175253	1487
Mercury ()*	None	Hg	2	175258,175263	397
Millerite ()*	Millerite	NiS	1	175245	1066
Nesquehonite ()*	None	Mg(CO₃)·3H₂O	1	175253	80
Nontronite ()*	Clay Smectite-vermiculite	Na_0.3Fe³⁺₂(Si,Al)₄O₁₀(OH)₂·nH₂O	1	175261	471
Opal ()*	Amorphous	SiO₂·nH₂O	1	175246	2994
Pectolite ()*	Pectolite	NaCa₂Si₃O₈(OH)	1	175253	363
Pyrite ()*	Pyrite	FeS₂	1	175245	39462
Pyroaurite ()*	Hydrotalcite	Mg₆Fe³⁺₂(CO₃)(OH)₁₆·4H₂O	2	175250,175253	89
Quartz ()*	Quartz	SiO₂	5	175246,175248,175250,175253,175255	61156
Taranakite ()*	Taranakite	K₃Al₅(PO₃OH)₆(PO₄)₂·18H₂O	1	175244	57
Wollastonite ()*	Wollastonite	CaSiO₃	1	175253	1247
Xonotlite ()*	None	Ca₆Si₆O₁₇(OH)₂	3	175246,175247,175254	109

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...