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:
Biotite Crystal Prospect, Topsham, Sagadahoc Co., Maine, USA

Oldest recorded age at locality: 274
Youngest recorded age at locality: 272

mindat Locality ID: 209598
mindat URL: http://www.mindat.org/loc-209598.html

Tectonic Settings:

Total number of sublocalities beneath "Biotite Crystal Prospect, Topsham, Sagadahoc 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.

Allanite	Apatite	Autunite	Clay	Epidote	Garnet	Meta-autunite	Mica	None	Quartz

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 Ca Ce F Fe H K O P Si U

Elements from minerals reported directly at this locality: Al Ca Ce F Fe H K O P Si U

Structural Groups for minerals in this locality:
Allanite Apatite Autunite Clay Epidote Garnet Meta-autunite Mica None Quartz

7 IMA Minerals at location:

Allanite-(Ce) ()*	Almandine ()*	Annite ()*	Autunite ()*	Fluorapatite ()*
Meta-autunite ()*	Quartz ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Allanite-(Ce) ()*	Allanite Epidote	CaCe(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)	274	272	706
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	274	272	2353
Annite ()*	Mica Clay	KFe²⁺₃(AlSi₃O₁₀)(OH)₂	274	272	356
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	274	272	1272
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	274	272	2740
Meta-autunite ()*	Meta-autunite	Ca(UO₂)₂(PO₄)₂·6H₂O	274	272	388
Quartz ()*	Quartz	SiO₂	274	272	61156

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_091	274	272	273±1	U/Pb			monazite			Yes				5949	Standpipe Hill Quarries, Topsham, Sagadahoc Co., Maine, USA	Topsham - E Standpipe	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...