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:
Windham, Windham Co., Connecticut, USA

Oldest recorded age at locality: 237.57
Youngest recorded age at locality: 207.57

mindat Locality ID: 238019
mindat URL: http://www.mindat.org/loc-238019.html

Tectonic Settings:

Total number of sublocalities beneath "Windham, Windham Co., Connecticut, USA": 4
Total number of bottom-level sublocalities: 3

Number of Child Localities: 2
Child Localities:
Mansfield Hollow Dam
Willimantic

Latitude: 41°43'51"N
Longitude: 72°11'24"W
Decimal Degree (lat, lon): 41.730833333333,-72.19

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.

Beryl	Bismutite	Calcite	Chlorite	Clay	Diaspore	Feldspar	Fluorite	Mica	Nickeline
None	Not in a structural group	Prehnite	Pyrite	Quartz	Rutile	Spinel	Titanite

Albite ()*	Annite ()*	Beryl ()*	Bismutite ()*	Calcite ()*
Clinochlore ()*	Fluorite ()*	Goethite ()*	Magnetite ()*	Microcline ()*
Prehnite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Rutile ()*
Sillimanite ()*	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 Be Bi C Ca F Fe H K Mg Na O S Si Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Beryl Bismutite Calcite Chlorite Clay Diaspore Feldspar Fluorite Mica Nickeline
None Not in a structural group Prehnite Pyrite Quartz Rutile Spinel Titanite

17 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
Albite ()*	Feldspar	Na(AlSi₃O₈)	237.57	207.57	2	199365,199367	8803
Annite ()*	Mica Clay	KFe²⁺₃(AlSi₃O₁₀)(OH)₂	237.57	207.57	1	199365	356
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	237.57	207.57	3	199365,199366,199368	4286
Bismutite ()*	Bismutite	Bi₂O₂(CO₃)			2	199366,199367	716
Calcite ()*	Calcite	Ca(CO₃)	237.57	207.57	1	199365	27770
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈			1	199366	1756
Fluorite ()*	Fluorite	CaF₂	237.57	207.57	1	199365	9617
Goethite ()*	Diaspore	FeO(OH)	237.57	207.57	1	199365	7437
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	237.57	207.57	2	199365,199366	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	237.57	207.57	2	199365,199367	4924
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂			1	199366	1898
Pyrite ()*	Pyrite	FeS₂	237.57	207.57	1	199365	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	237.57	207.57	1	199365	9056
Quartz ()*	Quartz	SiO₂	237.57	207.57	3	199365,199366,199367	61156
Rutile ()*	Rutile	TiO₂	237.57	207.57	1	199365	5614
Sillimanite ()*	Not in a structural group	Al₂SiO₅			1	199366	1516
Titanite ()*	Titanite	CaTi(SiO₄)O	237.57	207.57	1	199365	4899

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
	USGS-Rb-Sr-00862	237.57	207.57	222.57±15	Rb-Sr	minimum age of intrusion		biotite							16106	Mansfield Hollow Dam, Windham, Windham Co., Connecticut, USA		USGS-Rb-Sr		USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...