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:
Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA

Oldest recorded age at locality: 56.6
Youngest recorded age at locality: 42

mindat Locality ID: 164301
mindat URL: http://www.mindat.org/loc-164301.html

Tectonic Settings:

Total number of sublocalities beneath "Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 48°10'9"N
Longitude: 109°44'5"W
Decimal Degree (lat, lon): 48.169166666667,-109.73472222222

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

7 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Num	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
NAVDAT-29739	56.6	48.4	52.5±4.1		29739	164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA		NAVDAT	NAVDAT
NAVDAT-29741	56.6	48.4	52.5±4.1		29741	164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA		NAVDAT	NAVDAT
NAVDAT-29744	56.6	48.4	52.5±4.1		29744	164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA		NAVDAT	NAVDAT
NAVDAT-29746	56.6	48.4	52.5±4.1		29746	164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA		NAVDAT	NAVDAT
NAVDAT-30339	54	42	48±6		30339	164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA		NAVDAT	NAVDAT
NAVDAT-30340	54	42	48±6		30340	164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA		NAVDAT	NAVDAT
ree-00654	55	49	Eocene-- 49-55 Ma (K-Ar)	K-Ar		164301	Rocky Boy Stock Occurrence, Chouteau Co., Montana, USA	Bearpaw Mountains (Rocky Boy)	Orris and Grauch (2002)	USGSOFR02_189

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...