Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

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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:
Ventura County Borate District (Stauffer District), San Emigdio Mts, Ventura Co., California, USA

Oldest recorded age at locality: 25
Youngest recorded age at locality: 21

mindat Locality ID: 215915
mindat URL: http://www.mindat.org/loc-215915.html

Tectonic Settings:

Total number of sublocalities beneath "Ventura County Borate District (Stauffer District), San Emigdio Mts, Ventura Co., California, USA": 16
Total number of bottom-level sublocalities: 14

Number of Child Localities: 1
Child Localities:
Lake Of The Woods Area

Latitude: 34°46'21"N
Longitude: 119°5'52"W
Decimal Degree (lat, lon): 34.7725,-119.09777777778

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.

Analcime	Calcite	Gypsum	Natrolite	None

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 B C Ca H Mg Na O S Si

Elements from minerals reported directly at this locality: Al H Na O Si

Structural Groups for minerals in this locality:
Analcime Calcite Gypsum Natrolite None

8 IMA Minerals at location:

Analcime ()*	Calcite ()*	Colemanite ()*	Gypsum ()*	Howlite ()*
Hydroboracite ()*	Mesolite ()*	Natrolite ()*

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
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	25	21	2	183893,183900	1627
Calcite ()*	Calcite	Ca(CO₃)	25	21	1	183893	27770
Colemanite ()*	None	CaB₃O₄(OH)₃·H₂O	25	21	8	183890,183891,183893,183895,183896,183900,183901,183902	144
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	25	21	9	183890,183891,183892,183893,183895,183896,183900,183901,183902	6890
Howlite ()*	None	Ca₂SiB₅O₉(OH)₅			1	183900	36
Hydroboracite ()*	None	CaMg[B₃O₄(OH)₃]₂·3H₂O	25	21	1	183893	42
Mesolite ()*	Natrolite	Na₂Ca₂(Si₉Al₆)O₃₀·8H₂O			1	183903	425
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O	25	21	0		1236

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
	NAVDAT-34021	25	21	23±2					34021						98391	Frazier Mine (Frazier Borax Mine), Lockwood Valley, Lake Of The Woods Area, Ventura County Borate District (Stauffer District), San Emigdio Mts, Ventura Co., California, USA		NAVDAT		NAVDAT
	NAVDAT-34022	25	21	23±2					34022						98391	Frazier Mine (Frazier Borax Mine), Lockwood Valley, Lake Of The Woods Area, Ventura County Borate District (Stauffer District), San Emigdio Mts, Ventura Co., California, USA		NAVDAT		NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...