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:
Highwood Mts, Chouteau Co., Montana, USA

mindat Locality ID: 31319
mindat URL: http://www.mindat.org/loc-31319.html

Tectonic Settings:

Total number of sublocalities beneath "Highwood Mts, Chouteau Co., Montana, USA": 4
Total number of bottom-level sublocalities: 4

Number of Child Localities: 4
Child Localities:
Comb Butte
Jaystack Butte
Shonkin Sag Laccolith
Square Butte

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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	Apatite	Calcite	Cancrinite-sodalite	Clay	Feldspar	Mica	Natrolite	None	Olivine
Pyroxene	Sodalite	Spinel	Titanite	Tridymite

Aegirine ()*	Analcime ()*	Augite ()*	Calcite ()*	Fluorapatite ()*
Forsterite ()*	Leucite ()*	Magnetite ()*	Natrolite ()*	Nepheline ()*
Orthoclase ()*	Phlogopite ()*	Sanidine ()*	Sodalite ()*	Titanite ()*

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 C Ca Cl F Fe H K Mg Na O P Si Ti

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

Structural Groups for minerals in this locality:
Analcime Apatite Calcite Cancrinite-sodalite Clay Feldspar Mica Natrolite None Olivine
Pyroxene Sodalite Spinel Titanite Tridymite

15 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆	1	227688	1022
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	0		1627
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	2	227688,227689	2060
Calcite ()*	Calcite	Ca(CO₃)	0		27770
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	1	227688	2740
Forsterite ()*	Olivine	Mg₂(SiO₄)	1	227688	1188
Leucite ()*	Analcime	K(AlSi₂O₆)	0		233
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1	227688	14899
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O	1	227688	1236
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	1	227688	884
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	0		2349
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	1	227687	2273
Sanidine ()*	Feldspar	K(AlSi₃O₈)	2	227686,227688	598
Sodalite ()*	Cancrinite-sodalite Sodalite	Na₄(Si₃Al₃)O₁₂Cl	1	227688	444
Titanite ()*	Titanite	CaTi(SiO₄)O	1	227688	4899

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...