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:
Bare Hills Copper Mine (Smith Avenue Copper Mine), Bare Hills, Baltimore Co., Maryland, USA

mindat Locality ID: 28714
mindat URL: http://www.mindat.org/loc-28714.html

Tectonic Settings:

Total number of sublocalities beneath "Bare Hills Copper Mine (Smith Avenue Copper Mine), Bare Hills, Baltimore Co., Maryland, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 39°22'39"N
Longitude: 76°39'54"W
Decimal Degree (lat, lon): 39.3775,-76.665

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.

Allophane	Amphibole	Aragonite	Calcite	Chalcanthite	Chalcopyrite	Clay	Clinozoisite	Covellite	Epidote
Feldspar	Garnet	Gypsum	Malachite	Melanterite	None	Not in a structural group	Pyrite	Pyroxene	Quartz
Spinel	Talc	Tourmaline

Actinolite ()*	Albite ()*	Almandine ()*	Anthophyllite ()*	Aragonite ()*
Azurite ()*	Bornite ()*	Calcite ()*	Carrollite ()*	Chalcanthite ()*
Chalcocite ()*	Chalcopyrite ()*	Chrysocolla ()*	Covellite ()*	Cummingtonite ()*
Cuprite ()*	Enstatite ()*	Epidote ()*	Ferro-hornblende ()*	Gypsum ()*
Laumontite ()*	Magnetite ()*	Malachite ()*	Melanterite ()*	Microcline ()*
Pyrite ()*	Quartz ()*	Schorl ()*	Talc ()*	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 B C Ca Co Cu Fe H K Mg Na O S Si

Elements from minerals reported directly at this locality: Al B C Ca Co Cu Fe H K Mg Na O S Si

Structural Groups for minerals in this locality:
Allophane Amphibole Aragonite Calcite Chalcanthite Chalcopyrite Clay Clinozoisite Covellite Epidote
Feldspar Garnet Gypsum Malachite Melanterite None Not in a structural group Pyrite Pyroxene Quartz
Spinel Talc Tourmaline

30 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	3419
Albite ()*	Feldspar	Na(AlSi₃O₈)	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	2353
Anthophyllite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂	718
Aragonite ()*	Aragonite	Ca(CO₃)	3250
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	5509
Bornite ()*	None	Cu₅FeS₄	5516
Calcite ()*	Calcite	Ca(CO₃)	27770
Carrollite ()*	Spinel	CuCo₂S₄	154
Chalcanthite ()*	Chalcanthite	Cu(SO₄)·5H₂O	925
Chalcocite ()*	None	Cu₂S	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	3531
Covellite ()*	Covellite	CuS	4165
Cummingtonite ()*	Amphibole	Mg₂Mg₅Si₈O₂₂(OH)₂	327
Cuprite ()*	Not in a structural group	Cu₂O	2970
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	944
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	8173
Ferro-hornblende ()*	Amphibole	Ca₂(Fe²⁺₄Al)(Si₇Al)O₂₂(OH)₂	271
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	6890
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	1271
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	12537
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O	915
Microcline ()*	Feldspar	K(AlSi₃O₈)	4924
Pyrite ()*	Pyrite	FeS₂	39462
Quartz ()*	Quartz	SiO₂	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	2705
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	3337
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	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...