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:
Wheaton, Montgomery Co., Maryland, USA

mindat Locality ID: 251738
mindat URL: http://www.mindat.org/loc-251738.html

Tectonic Settings:

Total number of sublocalities beneath "Wheaton, Montgomery Co., Maryland, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Kensington Mica Mine (Gilmore Mine; B. H. Warner Mine)

Latitude: 39°3'23"N
Longitude: 77°'46"W
Decimal Degree (lat, lon): 39.056388888889,-77.012777777778

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.

Apatite	Autunite	Beryl	Clay	Feldspar	Mica	None	Not in a structural group	Quartz	Spinel
Tourmaline

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 Ca F Fe H K Na O P Si U Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Apatite Autunite Beryl Clay Feldspar Mica None Not in a structural group Quartz Spinel
Tourmaline

10 IMA Minerals at location:

Albite ()*	Autunite ()*	Bertrandite ()*	Beryl ()*	Fluorapatite ()*
Gahnite ()*	Microcline ()*	Muscovite ()*	Quartz ()*	Schorl ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	1	218968	8803
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	1	218968	1272
Bertrandite ()*	Not in a structural group	Be₄Si₂O₇(OH)₂	1	218968	606
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	1	218968	4286
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	1	218968	2740
Gahnite ()*	Spinel	ZnAl₂O₄	1	218968	445
Microcline ()*	Feldspar	K(AlSi₃O₈)	1	218968	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1	218968	17380
Quartz ()*	Quartz	SiO₂	1	218968	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	1	218968	2705

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...