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:
East Kramer District, San Bernardino Co., California, USA

Oldest recorded age at locality: 22
Youngest recorded age at locality: 17

mindat Locality ID: 215478
mindat URL: http://www.mindat.org/loc-215478.html

Tectonic Settings:

Total number of sublocalities beneath "East Kramer District, San Bernardino Co., California, USA": 90
Total number of bottom-level sublocalities: 83

Number of Child Localities: 1
Child Localities:
East Kramer Borate Area (East Kramer Colemanite Area)

Latitude: 34°51'19"N
Longitude: 117°31'51"W
Decimal Degree (lat, lon): 34.855277777778,-117.53083333333

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	Autunite	Calcite	Clay	Copper	Marcasite	None	Orpiment	Palygorskite	Pyrite
Quartz	Smectite-vermiculite	Spinel	Veatchite

Analcime ()*	Autunite ()*	Calcite ()*	Carnotite ()*	Colemanite ()*
Gold ()*	Greigite ()*	Howlite ()*	Magnesite ()*	Marcasite ()*
Montmorillonite ()*	Orpiment ()*	Palygorskite ()*	Pyrite ()*	Quartz ()*
Realgar ()*	Tunellite ()*	Uranophane-α ()*	Veatchite ()*

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 As Au B C Ca Fe H K Mg Na O P S Si Sr U V

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Analcime Autunite Calcite Clay Copper Marcasite None Orpiment Palygorskite Pyrite
Quartz Smectite-vermiculite Spinel Veatchite

19 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
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	22	17	1	171482	1627
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O			1	171491	1272
Calcite ()*	Calcite	Ca(CO₃)	22	18	3	171548,171557,171560	27770
Carnotite ()*	None	K₂(UO₂)₂(VO₄)₂·3H₂O			2	171488,171491	1184
Colemanite ()*	None	CaB₃O₄(OH)₃·H₂O	22	18	4	171548,171557,171560,171562	144
Gold ()*	Copper	Au			3	171490,171494,171498	30554
Greigite ()*	Spinel	Fe²⁺Fe³⁺₂S₄			1	171548	62
Howlite ()*	None	Ca₂SiB₅O₉(OH)₅	22	17	2	171554,171571	36
Magnesite ()*	Calcite	Mg(CO₃)			1	171489	1487
Marcasite ()*	Marcasite	FeS₂			1	171548	5674
Montmorillonite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O			1	171548	1508
Orpiment ()*	Orpiment	As₂S₃	22	18	3	171548,171551,171560	511
Palygorskite ()*	Palygorskite Clay	(Mg,Al)₂Si₄O₁₀(OH)·4H₂O			1	171548	306
Pyrite ()*	Pyrite	FeS₂			1	171548	39462
Quartz ()*	Quartz	SiO₂			3	171490,171494,171498	61156
Realgar ()*	None	AsS	22	18	3	171548,171551,171560	712
Tunellite ()*	None	SrB₆O₉(OH)₂·3H₂O	22	17	1	171482	12
Uranophane-α ()*	None	Ca(UO₂)₂(SiO₃OH)₂·5H₂O			1	171491	890
Veatchite ()*	Veatchite	Sr₂B₁₁O₁₆(OH)₅·H₂O			2	171548,171550	12

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Sample Num	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
NAVDAT-19646	22	18	20±2	19646	273505	Red Buttes, East Kramer Borate Area (East Kramer Colemanite Area), East Kramer District, San Bernardino Co., California, USA	NAVDAT	NAVDAT
NAVDAT-19649	22	18	20±2	19649	273505	Red Buttes, East Kramer Borate Area (East Kramer Colemanite Area), East Kramer District, San Bernardino Co., California, USA	NAVDAT	NAVDAT
NAVDAT-19629	22	18	20±2	19629	271633	Saddleback Mountain, East Kramer Borate Area (East Kramer Colemanite Area), East Kramer District, San Bernardino Co., California, USA	NAVDAT	NAVDAT
NAVDAT-58166	20	17	18+2/-1	58166	271633	Saddleback Mountain, East Kramer Borate Area (East Kramer Colemanite Area), East Kramer District, San Bernardino Co., California, USA	NAVDAT	NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...