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:
Unnamed Pegmatite Locality, Windham, Cumberland Co., Maine, USA

Oldest recorded age at locality: 265
Youngest recorded age at locality: 263

mindat Locality ID: 6692
mindat URL: http://www.mindat.org/loc-6692.html

Tectonic Settings:

Total number of sublocalities beneath "Unnamed Pegmatite Locality, Windham, Cumberland Co., Maine, USA": 0
Total number of bottom-level sublocalities: 0

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.

Beryl	Clay	Feldspar	Garnet	Mica	None	Not in a structural group	Pyroxene	Quartz	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 Be Fe H K Li O Si

Elements from minerals reported directly at this locality: Al Be Fe H K Li O Si

Structural Groups for minerals in this locality:
Beryl Clay Feldspar Garnet Mica None Not in a structural group Pyroxene Quartz Staurolite

8 IMA Minerals at location:

Almandine ()*	Beryl ()*	Kyanite ()*	Microcline ()*	Muscovite ()*
Quartz ()*	Spodumene ()*	Staurolite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	265	263	2353
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	265	263	4286
Kyanite ()*	Not in a structural group	Al₂OSiO₄	265	263	1507
Microcline ()*	Feldspar	K(AlSi₃O₈)	265	263	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	265	263	17380
Quartz ()*	Quartz	SiO₂	265	263	61156
Spodumene ()*	Pyroxene	LiAlSi₂O₆	265	263	688
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)	265	263	978

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
	Bradley_2012_092	265	263	264±1	U/Pb			zircon			Yes	Zircon			237377	Sebago, Cumberland Co., Maine, USA	Mt. Mica (Irish Pit)	McCauley and Bradley (2014)	10.3749/canmin.52.2.183	CM52_183

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...