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:
Fairfield, Fairfield Co., Connecticut, USA

Oldest recorded age at locality: 434.43
Youngest recorded age at locality: 404.08

mindat Locality ID: 65992
mindat URL: http://www.mindat.org/loc-65992.html

Tectonic Settings:

Total number of sublocalities beneath "Fairfield, Fairfield Co., Connecticut, USA": 7
Total number of bottom-level sublocalities: 6

Number of Child Localities: 6
Child Localities:
Congress Street Construction Site
Exit 24 Interstate Highway 95
Metro North Train Station
Southport
The Brickwalk
The Cascades

Latitude: 41°9'56"N
Longitude: 73°15'3"W
Decimal Degree (lat, lon): 41.165555555556,-73.250833333333

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.

Clay	Clinozoisite	Corundum	Epidote	Feldspar	Garnet	Marcasite	Mica	None	Not in a structural group
Pyrite	Quartz	Staurolite	Tourmaline

Albite ()*	Almandine ()*	Anatase ()*	Epidote ()*	Hematite ()*
Laumontite ()*	Marcasite ()*	Microcline ()*	Muscovite ()*	Pyrite ()*
Quartz ()*	Schorl ()*	Sillimanite ()*	Staurolite ()*

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 Ca Fe H K Na O S Si Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Clay Clinozoisite Corundum Epidote Feldspar Garnet Marcasite Mica None Not in a structural group
Pyrite Quartz Staurolite Tourmaline

14 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)			1	198731	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃			2	198725,198731	2353
Anatase ()*	Not in a structural group	TiO₂			1	198730	2162
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	434.43	404.08	1	198726	8173
Hematite ()*	Corundum	Fe₂O₃			1	198731	14640
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	434.43	404.08	1	198726	1271
Marcasite ()*	Marcasite	FeS₂			1	198727	5674
Microcline ()*	Feldspar	K(AlSi₃O₈)			1	198731	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂			3	198725,198727,198731	17380
Pyrite ()*	Pyrite	FeS₂			1	198727	39462
Quartz ()*	Quartz	SiO₂	434.43	404.08	5	198725,198726,198727,198730,198731	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)			1	198731	2705
Sillimanite ()*	Not in a structural group	Al₂SiO₅			2	198725,198729	1516
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)			1	198731	978

2 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-01153	434.43	414.43	424.43±10	Rb-Sr	minimum age of metamorphic crystallization		whole rock							251457	Exit 24 Interstate Highway 95, Fairfield, Fairfield Co., Connecticut, USA		USGS-Rb-Sr		USGS-Rb-Sr
	USGS-Rb-Sr-01154	424.08	404.08	414.08±10	Rb-Sr	minimum age of metamorphic crystallization		whole rock							251457	Exit 24 Interstate Highway 95, Fairfield, Fairfield 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...