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:
Bear Lodge Mountains Occurrence, Bear Lodge Mining District, Crook Co., Wyoming, USA

Oldest recorded age at locality: 50.5
Youngest recorded age at locality: 38

mindat Locality ID: 171571
mindat URL: http://www.mindat.org/loc-171571.html

Tectonic Settings:

Total number of sublocalities beneath "Bear Lodge Mountains Occurrence, Bear Lodge Mining District, Crook Co., Wyoming, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 44°28'60"N
Longitude: 104°25'60"W
Decimal Degree (lat, lon): 44.483333333333,-104.43333333333

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.

No IMA Minerals occur at this locality according to mindat

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000651	MAGMATIC STYLE: Dykes. ASSOCIATED SILICATE ROCKS: Phonolite, trachyte, syenite, nepheline syenite, latite, pseudoleucite porphyry, lamprophyre.
Jen_0000652	MAGMATIC STYLE: Dykes. ASSOCIATED SILICATE ROCKS: Phonolite, trachyte, syenite, nepheline syenite, latite, pseudoleucite porphyry, lamprophyre.

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Sample Num	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Jen_0000651	44.5	44.5	44.5	K-Ar	sanidine		Sanidine	171571	Bear Lodge Mountains Occurrence, Bear Lodge Mining District, Crook Co., Wyoming, USA	Bear Lodge Mountains	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000652	50.5	38.5	50.5-38.5	K-Ar	sanidine		Sanidine	171571	Bear Lodge Mountains Occurrence, Bear Lodge Mining District, Crook Co., Wyoming, USA	Bear Lodge Mountains	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
NAVDAT-11140	50	38	44±6			11140		171571	Bear Lodge Mountains Occurrence, Bear Lodge Mining District, Crook Co., Wyoming, USA		NAVDAT		NAVDAT
ree-00653	50.5	38.3	38.3 to 50.5 Ma (K-Ar, san,)	K-Ar	sanidine		Sanidine	171571	Bear Lodge Mountains Occurrence, Bear Lodge Mining District, Crook Co., Wyoming, USA	Bear Lodge Mountains (southern)	Orris and Grauch (2002)		USGSOFR02_189

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...