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 Co., Connecticut, USA

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

mindat Locality ID: 16108
mindat URL: http://www.mindat.org/loc-16108.html

Tectonic Settings:

Total number of sublocalities beneath "Windham Co., Connecticut, USA": 24
Total number of bottom-level sublocalities: 14

Number of Child Localities: 10
Child Localities:
Hampton
Killingly
Mansfield
Plainfield
Pomfret
Sterling
Thompson
Wauregan
Windham
Woodstock

Latitude: 41°48'57"N
Longitude: 71°58'42"W
Decimal Degree (lat, lon): 41.815833333333,-71.978333333333

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.

Amphibole	Beryl	Bismutite	Calcite	Chlorite	Clay	Corundum	Diaspore	Feldspar	Fluorite
Garnet	Kaolinite	Mica	Nickeline	None	Not in a structural group	Prehnite	Pyrite	Quartz	Rutile
Spinel	Staurolite	Stilbite	Titanite	Tourmaline

Actinolite ()*	Albite ()*	Almandine ()*	Annite ()*	Beryl ()*
Bismutite ()*	Calcite ()*	Clinochlore ()*	Corundum ()*	Fluorite ()*
Goethite ()*	Graphite ()*	Hematite ()*	Kaolinite ()*	Kyanite ()*
Magnetite ()*	Microcline ()*	Muscovite ()*	Prehnite ()*	Pyrite ()*
Pyrrhotite ()*	Quartz ()*	Rutile ()*	Schorl ()*	Sillimanite ()*
Staurolite ()*	Stilbite-Ca ()*	Titanite ()*	Tremolite ()*

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 B Be Bi C Ca F Fe H K Mg Na O S Si Ti

Elements from minerals reported directly at this locality: C

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

29 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
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂			1	199359	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)	237.57	207.57	3	199356,199365,199367	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃			1	199358	2353
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	2	199361,199365	27770
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈			1	199366	1756
Corundum ()*	Corundum	Al₂O₃			1	199361	1797
Fluorite ()*	Fluorite	CaF₂	237.57	207.57	1	199365	9617
Goethite ()*	Diaspore	FeO(OH)	237.57	207.57	3	199356,199359,199365	7437
Graphite ()*	None	C	237.57	207.57	0		2812
Hematite ()*	Corundum	Fe₂O₃			2	199356,199361	14640
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄			1	199349	5591
Kyanite ()*	Not in a structural group	Al₂OSiO₄			2	199348,199361	1507
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	237.57	207.57	4	199358,199361,199365,199366	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	237.57	207.57	2	199365,199367	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			1	199361	17380
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂			1	199366	1898
Pyrite ()*	Pyrite	FeS₂	237.57	207.57	3	199349,199359,199365	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	237.57	207.57	1	199365	9056
Quartz ()*	Quartz	SiO₂	237.57	207.57	11	199348,199351,199352,199354,199355,199356,199358,199365,199366,199367,199370	61156
Rutile ()*	Rutile	TiO₂	237.57	207.57	2	199361,199365	5614
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)			1	199361	2705
Sillimanite ()*	Not in a structural group	Al₂SiO₅			1	199366	1516
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)			1	199358	978
Stilbite-Ca ()*	Stilbite	NaCa₄(Si₂₇Al₉)O₇₂·28H₂O			1	199359	268
Titanite ()*	Titanite	CaTi(SiO₄)O	237.57	207.57	2	199358,199365	4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂			1	199361	2562

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...