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:
Gilliam Vermiculite Deposit (Pony Vermiculite Deposit), Mineral Hill Mining District (Pony Mining District), Madison Co., Montana, USA

Oldest recorded age at locality: 70
Youngest recorded age at locality: 70

mindat Locality ID: 161628
mindat URL: http://www.mindat.org/loc-161628.html

Tectonic Settings:

Total number of sublocalities beneath "Gilliam Vermiculite Deposit (Pony Vermiculite Deposit), Mineral Hill Mining District (Pony Mining District), Madison Co., Montana, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 45°42'45"N
Longitude: 111°56'7"W
Decimal Degree (lat, lon): 45.7125,-111.93527777778

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.

Calcite	Clay	Garnet	Mica	None	Pyroxene	Quartz	Smectite-vermiculite	Spinel	Vesuvianite

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 F Fe H Mg Na O Si

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

Structural Groups for minerals in this locality:
Calcite Clay Garnet Mica None Pyroxene Quartz Smectite-vermiculite Spinel Vesuvianite

9 IMA Minerals at location:

Andradite ()*	Calcite ()*	Clintonite ()*	Diopside ()*	Grossular ()*
Quartz ()*	Spinel ()*	Vermiculite ()*	Vesuvianite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Andradite ()*	Garnet	Ca₃Fe³⁺₂(SiO₄)₃	70	70	1534
Calcite ()*	Calcite	Ca(CO₃)	70	70	27770
Clintonite ()*	Mica Clay	CaAlMg₂(SiAl₃O₁₀)(OH)₂	70	70	86
Diopside ()*	Pyroxene	CaMgSi₂O₆	70	70	4135
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃	70	70	1544
Quartz ()*	Quartz	SiO₂	70	70	61156
Spinel ()*	Spinel	MgAl₂O₄	70	70	1934
Vermiculite ()*	Clay Smectite-vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O	70	70	652
Vesuvianite ()*	Vesuvianite	(Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀	70	70	1395

1 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
	Mo-00186	70	70								Yes		Molybdenite, Powellite, Wulfenite	Mo	23236	Madison Co., Montana, USA	Madison County	Gammons et al. (2006)	10.1007/s10230-006-0113-7	MWE25_70

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...