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 Mateo Co., California, USA

Oldest recorded age at locality: 25
Youngest recorded age at locality: 0

mindat Locality ID: 210517
mindat URL: http://www.mindat.org/loc-210517.html

Tectonic Settings:

Total number of sublocalities beneath "San Mateo Co., California, USA": 102
Total number of bottom-level sublocalities: 72

Number of Child Localities: 22
Child Localities:
Atherton
Belmont
Brisbane
Colma
Daly City
Emerald Lake Hills
Half Moon Bay
Menlo Park
Millbrae
Pacifica
Palo Alto Area
Pescadero
Point Ano Nuevo (Capo Año Nuevo)
Portola Valley
Redwood City
Rockaway Beach
San Carlos
San Mateo
Santa Cruz Mts
Searsville Lake
South San Francisco
Unspecified Highway 1 Roadcut

Latitude: 37°31'37"N
Longitude: 122°21'11"W
Decimal Degree (lat, lon): 37.526944444444,-122.35305555556

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.

Alunite	Amorphous	Amphibole	Analcime	Calcite	Clay	Copper	Feldspar	Gypsum	Lawsonite
Mica	None	Not in a structural group	Pyrite	Quartz	Rocksalt	Smectite-vermiculite	Sphalerite	Spinel	Titanite
Vivianite

Alunite ()*	Ammoniojarosite ()*	Analcime ()*	Anatase ()*	Buddingtonite ()*
Calcite ()*	Calomel ()*	Carnotite ()*	Celadonite ()*	Chromite ()*
Cinnabar ()*	Dolomite ()*	Edgarbaileyite ()*	Eglestonite ()*	Galena ()*
Glaucophane ()*	Gold ()*	Gypsum ()*	Halite ()*	Hydromagnesite ()*
Lawsonite ()*	Magnesiochromite ()*	Magnesite ()*	Magnetite ()*	Margarite ()*
Melanophlogite ()*	Mercury ()*	Metacinnabar ()*	Montmorillonite ()*	Montroydite ()*
Mosesite ()*	Niter ()*	Opal ()*	Pyrite ()*	Quartz ()*
Silver ()*	Terlinguaite ()*	Tiemannite ()*	Titanite ()*	Tunisite ()*
Vivianite ()*	Wattersite ()*

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 Au C Ca Cl Cr Fe H Hg K Mg N Na O P Pb S Se Si Ti U V

Elements from minerals reported directly at this locality: Ca O Si Ti

Structural Groups for minerals in this locality:
Alunite Amorphous Amphibole Analcime Calcite Clay Copper Feldspar Gypsum Lawsonite
Mica None Not in a structural group Pyrite Quartz Rocksalt Smectite-vermiculite Sphalerite Spinel Titanite
Vivianite

42 IMA Minerals at location:

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
Alunite ()*	None	KAl₃(SO₄)₂(OH)₆			1	175766	966
Ammoniojarosite ()*	Alunite	(NH₄)Fe³⁺₃(SO₄)₂(OH)₆			1	175766	30
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O			1	175829	1627
Anatase ()*	Not in a structural group	TiO₂			1	175766	2162
Buddingtonite ()*	Feldspar	(NH₄)(AlSi₃)O₈			7	175734,175763,175764,175765,175766,175767,175777	27
Calcite ()*	Calcite	Ca(CO₃)			2	175781,175792	27770
Calomel ()*	None	HgCl			5	175778,175788,175792,175793,175798	91
Carnotite ()*	None	K₂(UO₂)₂(VO₄)₂·3H₂O			1	175766	1184
Celadonite ()*	Mica Clay	KMgFe³⁺Si₄O₁₀(OH)₂			1	175808	309
Chromite ()*	Spinel	Fe²⁺Cr₂O₄			1	175812	3902
Cinnabar ()*	None	HgS			8	175766,175777,175778,175788,175792,175793,175795,175798	2600
Dolomite ()*	None	CaMg(CO₃)₂			2	175778,175792	9895
Edgarbaileyite ()*	None	Hg¹⁺₆Si₂O₇			1	175792	6
Eglestonite ()*	None	([Hg¹⁺]₂)₃OCl₃(OH)			6	175777,175778,175788,175792,175793,175798	36
Galena ()*	Rocksalt	PbS			1	175790	24243
Glaucophane ()*	Amphibole	Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂			1	175799	286
Gold ()*	Copper	Au			3	175751,175816,175823	30554
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O			7	175734,175753,175764,175766,175767,175794,175834	6890
Halite ()*	Rocksalt	NaCl			1	175796	1398
Hydromagnesite ()*	None	Mg₅(CO₃)₄(OH)₂·4H₂O			1	175831	341
Lawsonite ()*	Lawsonite	CaAl₂(Si₂O₇)(OH)₂·H₂O			1	175799	121
Magnesiochromite ()*	Spinel	MgCr₂O₄			2	175792,175793	311
Magnesite ()*	Calcite	Mg(CO₃)			1	175778	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			1	175792	14899
Margarite ()*	Mica Clay	CaAl₂Si₂Al₂O₁₀(OH)₂			1	175735	168
Melanophlogite ()*	None	C₂H₁₇O₅·Si₄₆O₉₂			1	175781	38
Mercury ()*	None	Hg			6	175778,175788,175792,175793,175795,175798	397
Metacinnabar ()*	Sphalerite	HgS			2	175792,175793	255
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O			6	175734,175763,175764,175765,175766,175767	1508
Montroydite ()*	None	HgO			3	175792,175795,175798	29
Mosesite ()*	None	(Hg₂N)Cl			1	175792	6
Niter ()*	None	K(NO₃)			1	175766	181
Opal ()*	Amorphous	SiO₂·nH₂O			1	175778	2994
Pyrite ()*	Pyrite	FeS₂			1	175766	39462
Quartz ()*	Quartz	SiO₂			9	175751,175766,175778,175781,175789,175792,175816,175823,175833	61156
Silver ()*	Copper	Ag			1	175796	5186
Terlinguaite ()*	None	Hg₂OCl			2	175792,175793	22
Tiemannite ()*	Sphalerite	HgSe			1	175792	83
Titanite ()*	Titanite	CaTi(SiO₄)O	25	0	0		4899
Tunisite ()*	None	NaCa₂Al₄(CO₃)₄(OH)₈Cl			1	175792	5
Vivianite ()*	Vivianite	Fe²⁺₃(PO₄)₂·8H₂O			1	175785	636
Wattersite ()*	None	Hg¹⁺₄Hg²⁺O₂(CrO₄)			2	175792,175793	3

2 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Hg-00134	5.3	0		?-?								Calomel, Cinnabar, Mercury, Metacinnabar, Montroydite, Terlinguaite, Wattersite, Eglestonite	Hg	220379	Emerald Lake Hills, San Mateo Co., California, USA	California Mercury Occurrences	Studemeister (1984)	10.1007/BF00199786	MD19_202
	NAVDAT-34018	25	21	23±2					34018						92362	Unnamed Au-Ag-K Mine [1], Pescadero, San Mateo Co., California, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL
R061115	Sharon Heights, Menlo Park, San Mateo Co., California, USA	https://rruff.info/R061115

All locality data graciously provided by mindat.org

All age data...