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:
Cornwall, Litchfield Co., Connecticut, USA

mindat Locality ID: 217858
mindat URL: http://www.mindat.org/loc-217858.html

Tectonic Settings:

Total number of sublocalities beneath "Cornwall, Litchfield Co., Connecticut, USA": 6
Total number of bottom-level sublocalities: 4

Number of Child Localities: 4
Child Localities:
Cornwall Bridge
Cornwall Hollow
Mine Mountain Graphite Prospect
West Cornwall

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.

Amorphous	Amphibole	Calcite	Clay	Clinozoisite	Diaspore	Epidote	Feldspar	Kaolinite	Mica
None	Not in a structural group	Pyroxene	Quartz	Spinel	Titanite

Albite ()*	Calcite ()*	Diopside ()*	Dolomite ()*	Epidote ()*
Goethite ()*	Graphite ()*	Kaolinite ()*	Kyanite ()*	Magnetite ()*
Microcline ()*	Muscovite ()*	Opal ()*	Quartz ()*	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 C Ca Fe H K Mg Na O Si Ti

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

Structural Groups for minerals in this locality:
Amorphous Amphibole Calcite Clay Clinozoisite Diaspore Epidote Feldspar Kaolinite Mica
None Not in a structural group Pyroxene Quartz Spinel Titanite

16 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	2	198943,198945	8803
Calcite ()*	Calcite	Ca(CO₃)	1	198942	27770
Diopside ()*	Pyroxene	CaMgSi₂O₆	0		4135
Dolomite ()*	None	CaMg(CO₃)₂	0		9895
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	1	198943	8173
Goethite ()*	Diaspore	FeO(OH)	1	198941	7437
Graphite ()*	None	C	1	198943	2812
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	0		5591
Kyanite ()*	Not in a structural group	Al₂OSiO₄	1	198943	1507
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1	198945	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	1	198945	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1	198945	17380
Opal ()*	Amorphous	SiO₂·nH₂O	1	198943	2994
Quartz ()*	Quartz	SiO₂	1	198945	61156
Titanite ()*	Titanite	CaTi(SiO₄)O	0		4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	1	198942	2562

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...