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:
Frederick Co., Maryland, USA

mindat Locality ID: 17420
mindat URL: http://www.mindat.org/loc-17420.html

Tectonic Settings:

Total number of sublocalities beneath "Frederick Co., Maryland, USA": 55
Total number of bottom-level sublocalities: 47

Number of Child Localities: 44
Child Localities:
Back Catoctin Furnace Ore Banks
Belt Deposit
Buckeystown
Catoctin/Catoctin Furance Banks
Clarey Ore Bank
Cox Mines (Mountain View Mine)
Dave Thomas Ore Bank
Eiler Prospect
Ensor Bank
Evergreen Point Quarry (Frederick Quarry; H. B. Mellott Estate; Inc.)
Frederick Gold Mine (Clifton Gold Mine)
Frederick Quarry
Green Valley Road Quarry (Lehigh Portland Cement Company)
Grim Ore Bank
Hammond Prospect (Pittinger Prospect)
Hines Prospects
Israel Creek Prospects
Johnsville
Kiefer Thomas Ore Bank
LeGore
Libertytown
Lime Kiln Quarry & Plant (Alpha Portland Cement Company)
Myersville
New London
New London Iron Mine
Nina Thomas Ore Bank
North Catoctin Furnace Ore Banks
P. G. Saubles Quarry
Patrick Ambush Ore Bank
Point Of Rocks Bank
Repp Mine
Rocky Ridge Pit (Baltimore Brick Company)
S. W. Barrick & Sons Inc (Woodsboro Quarry)
South Furnace Ore Bank
South Mountain Prospect
Southwest Catoctin Furnace Ore Bank
Union Bridge
Unionville Mine
Unnamed Iron (MRDS - 10083888)
Washington Junction Ore Banks
Woodsboro
Woodsboro Quarry (Lehigh Portland Cement Company)
Yingling Ore Bank
Zimmerman Ore Bank

Latitude: 39°27'43"N
Longitude: 77°20'52"W
Decimal Degree (lat, lon): 39.461944444444,-77.347777777778

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	Baryte	Calcite	Chalcanthite	Chalcopyrite	Chloritoid	Clay	Clinozoisite
Copper	Corundum	Covellite	Diaspore	Epidote	Feldspar	Malachite	Mica	None	Not in a structural group
Pyrite	Quartz	Rocksalt	Rutile	Scheelite	Sphalerite	Spinel	Sulphur	Talc	Tetrahedrite
Titanite

Actinolite ()*	Anglesite ()*	Aurichalcite ()*	Azurite ()*	Baryte ()*
Bornite ()*	Calcite ()*	Cerussite ()*	Chalcanthite ()*	Chalcocite ()*
Chalcopyrite ()*	Chrysocolla ()*	Copper ()*	Covellite ()*	Cuprite ()*
Dolomite ()*	Epidote ()*	Galena ()*	Goethite ()*	Gold ()*
Hematite ()*	Hemimorphite ()*	Hydrozincite ()*	Magnetite ()*	Malachite ()*
Muscovite ()*	Orthoclase ()*	Ottrélite ()*	Pyrite ()*	Pyrolusite ()*
Quartz ()*	Rosasite ()*	Silver ()*	Smithsonite ()*	Sphalerite ()*
Strontianite ()*	Sulphur ()*	Talc ()*	Tenorite ()*	Tetrahedrite-(Zn) ()*
Titanite ()*	Wulfenite ()*

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: Ag Al Au Ba C Ca Cu Fe H K Mg Mn Mo O Pb S Sb Si Sr Ti Zn

Elements from minerals reported directly at this locality: Cu Mn O

Structural Groups for minerals in this locality:
Allophane Amphibole Aragonite Baryte Calcite Chalcanthite Chalcopyrite Chloritoid Clay Clinozoisite
Copper Corundum Covellite Diaspore Epidote Feldspar Malachite Mica None Not in a structural group
Pyrite Quartz Rocksalt Rutile Scheelite Sphalerite Spinel Sulphur Talc Tetrahedrite
Titanite

42 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	1	218725	3419
Anglesite ()*	Baryte	Pb(SO₄)	1	218698	2734
Aurichalcite ()*	None	(Zn,Cu)₅(CO₃)₂(OH)₆	2	218724,218740	919
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	3	218698,218718,218732	5509
Baryte ()*	Baryte	Ba(SO₄)	7	218698,218707,218711,218718,218724,218725,218729	11547
Bornite ()*	None	Cu₅FeS₄	8	218698,218707,218709,218717,218718,218725,218732,218740	5516
Calcite ()*	Calcite	Ca(CO₃)	12	218698,218700,218707,218708,218709,218717,218718,218724,218725,218729,218732,218740	27770
Cerussite ()*	Aragonite	Pb(CO₃)	1	218698	4979
Chalcanthite ()*	Chalcanthite	Cu(SO₄)·5H₂O	2	218698,218718	925
Chalcocite ()*	None	Cu₂S	8	218707,218708,218709,218717,218718,218725,218732,218740	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	7	218698,218717,218718,218724,218725,218732,218740	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	2	218717,218718	3531
Copper ()*	Copper	Cu	0		3846
Covellite ()*	Covellite	CuS	1	218707	4165
Cuprite ()*	Not in a structural group	Cu₂O	2	218724,218725	2970
Dolomite ()*	None	CaMg(CO₃)₂	3	218718,218732,218740	9895
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	3	218698,218718,218722	8173
Galena ()*	Rocksalt	PbS	6	218698,218700,218703,218717,218724,218740	24243
Goethite ()*	Diaspore	FeO(OH)	2	218696,218731	7437
Gold ()*	Copper	Au	2	218718,218725	30554
Hematite ()*	Corundum	Fe₂O₃	6	218696,218698,218707,218718,218724,218725	14640
Hemimorphite ()*	Not in a structural group	Zn₄(Si₂O₇)(OH)₂·H₂O	2	218724,218740	1689
Hydrozincite ()*	None	Zn₅(CO₃)₂(OH)₆	1	218740	1066
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	2	218718,218722	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	8	218698,218707,218717,218718,218724,218725,218732,218740	12537
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	2	218722,218725	17380
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	1	218725	2349
Ottrélite ()*	Chloritoid	Mn²⁺Al₂O(SiO₄)(OH)₂	1	218717	59
Pyrite ()*	Pyrite	FeS₂	6	218698,218703,218717,218718,218725,218740	39462
Pyrolusite ()*	Rutile	MnO₂	0		3106
Quartz ()*	Quartz	SiO₂	11	218698,218703,218707,218708,218709,218718,218722,218724,218725,218732,218740	61156
Rosasite ()*	Malachite	CuZn(CO₃)(OH)₂	1	218724	454
Silver ()*	Copper	Ag	1	218725	5186
Smithsonite ()*	Calcite	Zn(CO₃)	3	218698,218724,218740	2473
Sphalerite ()*	Sphalerite	ZnS	5	218698,218700,218717,218724,218740	21482
Strontianite ()*	Aragonite	Sr(CO₃)	1	218725	589
Sulphur ()*	Sulphur	S	1	218698	2045
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	1	218703	3337
Tenorite ()*	None	CuO	2	218718,218740	1101
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	1	218718	5317
Titanite ()*	Titanite	CaTi(SiO₄)O	1	218725	4899
Wulfenite ()*	Scheelite	PbMoO₄	1	218705	1655

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...