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:
St. Mary's Co., Maryland, USA

mindat Locality ID: 214199
mindat URL: http://www.mindat.org/loc-214199.html

Tectonic Settings:

Total number of sublocalities beneath "St. Mary's Co., Maryland, USA": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
Chancellor's Point
St. Mary's City
St. Mary's County Meteorite

Latitude: 38°10'26"N
Longitude: 76°25'12"W
Decimal Degree (lat, lon): 38.173888888889,-76.42

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.

Copper	Feldspar	Gypsum	Iron	None	Olivine	Pentlandite	Pyroxene	Spinel

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 Cr Cu Fe H Mg Na Ni O S Si

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Copper Feldspar Gypsum Iron None Olivine Pentlandite Pyroxene Spinel

11 IMA Minerals at location:

Albite ()*	Chromite ()*	Clinoenstatite ()*	Copper ()*	Forsterite ()*
Gypsum ()*	Iron ()*	Pentlandite ()*	Spinel ()*	Taenite ()*
Troilite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	1	219016	8803
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	1	219016	3902
Clinoenstatite ()*	Pyroxene	Mg₂Si₂O₆	1	219016	94
Copper ()*	Copper	Cu	1	219016	3846
Forsterite ()*	Olivine	Mg₂(SiO₄)	1	219016	1188
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	2	219014,219015	6890
Iron ()*	Iron	Fe	1	219016	1089
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈	1	219016	1512
Spinel ()*	Spinel	MgAl₂O₄	1	219016	1934
Taenite ()*	None	(Ni,Fe)	1	219016	703
Troilite ()*	None	FeS	1	219016	1044

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...