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:
Contra Costa Co., California, USA

Oldest recorded age at locality: 5.3
Youngest recorded age at locality: 0

mindat Locality ID: 3448
mindat URL: http://www.mindat.org/loc-3448.html

Tectonic Settings:

Total number of sublocalities beneath "Contra Costa Co., California, USA": 137
Total number of bottom-level sublocalities: 104

Number of Child Localities: 23
Child Localities:
Antioch
Bay Point (West Pittsburg)
Bayview-Montalvin
Brentwood
Briones Hills
Byron
Clyde
Concord
Diablo Range
Discovery Bay
El Cerrito
El Sobrante
Hercules
Knightsen
Martinez
Nortonville
Orinda
Pacheco
Port Costa
Richmond
San Pablo
Somersville
Walnut Creek

Latitude: 37°57'15"N
Longitude: 122°'44"W
Decimal Degree (lat, lon): 37.954166666667,-122.01222222222

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.

Allophane	Alum	Amorphous	Amphibole	Apatite	Baryte	Calcite	Chalcanthite	Chalcopyrite	Chlorite
Clay	Copiapite	Copper	Coquimbite	Cristobalite	Epsomite	Feldspar	Fluorite	Halotrichite	Lawsonite
Marcasite	Melanterite	Mica	Millerite	None	Not in a structural group	Pyrite	Pyrochlore	Pyroxene	Quartz
Rutile	Römerite	Serpentine	Sphalerite	Spinel	Stibnite	Titanite	Voltaite

Actinolite ()*	Albite ()*	Alum-(K) ()*	Alunogen ()*	Anthophyllite ()*
Baryte ()*	Bornite ()*	Calcite ()*	Chalcopyrite ()*	Chromite ()*
Chrysocolla ()*	Chrysotile ()*	Cinnabar ()*	Clinochlore ()*	Copiapite ()*
Coquimbite ()*	Cristobalite ()*	Diopside ()*	Enstatite ()*	Epsomite ()*
Fluorapatite ()*	Fluorite ()*	Glaucophane ()*	Gold ()*	Halotrichite ()*
Hypercinnabar ()*	Kornelite ()*	Lawsonite ()*	Marcasite ()*	Melanterite ()*
Metacinnabar ()*	Millerite ()*	Morenosite ()*	Muscovite ()*	Opal ()*
Pyrite ()*	Pyrolusite ()*	Quartz ()*	Römerite ()*	Rutile ()*
Schuetteite ()*	Siderotil ()*	Stibiconite ()*	Stibnite ()*	Titanite ()*
Tremolite ()*	Valentinite ()*	Voltaite ()*

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 Ba C Ca Cr Cu F Fe H Hg K Mg Mn Na Ni O P S Sb Si Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Alum Amorphous Amphibole Apatite Baryte Calcite Chalcanthite Chalcopyrite Chlorite
Clay Copiapite Copper Coquimbite Cristobalite Epsomite Feldspar Fluorite Halotrichite Lawsonite
Marcasite Melanterite Mica Millerite None Not in a structural group Pyrite Pyrochlore Pyroxene Quartz
Rutile Römerite Serpentine Sphalerite Spinel Stibnite Titanite Voltaite

48 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	5.3	1	153729	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)	5.3	1	153729	8803
Alum-(K) ()*	Alum	KAl(SO₄)₂·12H₂O	5.3	1	153701	92
Alunogen ()*	Not in a structural group	Al₂(SO₄)₃(H₂O)₁₂·5H₂O	5.3	1	153655	272
Anthophyllite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂	5.3	1	153729	718
Baryte ()*	Baryte	Ba(SO₄)	5.3	1	153652	11547
Bornite ()*	None	Cu₅FeS₄	5.3	1	153647	5516
Calcite ()*	Calcite	Ca(CO₃)	5.3	2	153655,153659	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	5.3	4	153645,153647,153650,153654	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	5.3	2	153648,153665	3902
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	5.3	1	153644	3531
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	5.3	2	153639,153658	951
Cinnabar ()*	None	HgS	5.3	2	153655,153659	2600
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	5.3	1	153729	1756
Copiapite ()*	Copiapite	Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂·20H₂O	5.3	1	153655	382
Coquimbite ()*	Coquimbite	AlFe₃(SO₄)₆(H₂O)₁₂·6H₂O	5.3	1	153655	136
Cristobalite ()*	Cristobalite	SiO₂	5.3	1	153655	453
Diopside ()*	Pyroxene	CaMgSi₂O₆	5.3	2	153653,153729	4135
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	5.3	1	153637	944
Epsomite ()*	Epsomite	Mg(SO₄)·7H₂O	5.3	1	153655	484
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	5.3	1	153688	2740
Fluorite ()*	Fluorite	CaF₂	5.3	1	153652	9617
Glaucophane ()*	Amphibole	Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂	5.3	3	153668,153685,153688	286
Gold ()*	Copper	Au	5.3	1	153647	30554
Halotrichite ()*	Halotrichite	Fe²⁺Al₂(SO₄)₄·22H₂O	5.3	1	153655	409
Hypercinnabar ()*	None	HgS	5.3	1	153655	4
Kornelite ()*	Not in a structural group	Fe³⁺₂(SO₄)₃·7H₂O (?)	5.3	1	153655	21
Lawsonite ()*	Lawsonite	CaAl₂(Si₂O₇)(OH)₂·H₂O	5.3	1	153687	121
Marcasite ()*	Marcasite	FeS₂	5.3	1	153655	5674
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O	5.3	1	153655	915
Metacinnabar ()*	Sphalerite	HgS	5.3	2	153655,153659	255
Millerite ()*	Millerite	NiS	5.3	1	153655	1066
Morenosite ()*	Epsomite	Ni(SO₄)·7H₂O	5.3	1	153655	84
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	5.3	1	153655	17380
Opal ()*	Amorphous	SiO₂·nH₂O	5.3	1	153619	2994
Pyrite ()*	Pyrite	FeS₂	5.3	3	153645,153655,153659	39462
Pyrolusite ()*	Rutile	MnO₂	5.3	1	153727	3106
Quartz ()*	Quartz	SiO₂	5.3	2	153645,153650	61156
Römerite ()*	Römerite	Fe²⁺Fe³⁺₂(SO₄)₄·14H₂O	5.3	1	153655	115
Rutile ()*	Rutile	TiO₂	5.3	1	153685	5614
Schuetteite ()*	None	Hg₃O₂(SO₄)	0	1	153655	21
Siderotil ()*	Chalcanthite	Fe(SO₄)·5H₂O	5.3	1	153655	84
Stibiconite ()*	Pyrochlore	Sb³⁺Sb⁵⁺₂O₆(OH)	5.3	1	153655	446
Stibnite ()*	Stibnite	Sb₂S₃	5.3	1	153655	3418
Titanite ()*	Titanite	CaTi(SiO₄)O	5.3	2	153685,153729	4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	5.3	1	153729	2562
Valentinite ()*	None	Sb₂O₃	5.3	1	153655	369
Voltaite ()*	Voltaite	K₂Fe²⁺₅Fe³⁺₃Al(SO₄)₁₂·18H₂O	5.3	1	153655	111

1 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-00032	5.3	0		?-?								Cinnabar, Hypercinnabar, Metacinnabar, Schuetteite	Hg	3448	Contra Costa Co., California, USA	California Mercury Occurrences	Studemeister (1984)	10.1007/BF00199786	MD19_202

Sample	Source Locality	Reference URL
R110059	Mount Diablo (Mt Diablo), Clayton, Diablo Range, Contra Costa Co., California, USA	https://rruff.info/R110059

All locality data graciously provided by mindat.org

All age data...