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:
Loudoun Co., Virginia, USA

mindat Locality ID: 4207
mindat URL: http://www.mindat.org/loc-4207.html

Tectonic Settings:

Total number of sublocalities beneath "Loudoun Co., Virginia, USA": 52
Total number of bottom-level sublocalities: 39

Number of Child Localities: 28
Child Localities:
Alaskite Quarry
Aldie
Arcola
Broad Run
Chantilly
Conklin
Culpeper Basin
Evergreen Mills
Furnace Mountain Mine
Gilberts Corner
Gneiss Quarry
Graywacke Quarry
Hamilton
Herndon
Hillsboro
Kimballton
Leesburg
Loudon Marble Company Quarry
Loudoun Prospect
Mountville
Oatlands
Round Hill
Sterling
Unnamed Copper Prospect (MRDS - 10276962)
Unnamed Iron Prospect (MRDS - 10251960)
Unnamed PGE Occurrence (MRDS - 10048644)
Virginia Crushed Stone Quarry
Virginia Trap Rock Quarry (Goose Creek Quarry)

Latitude: 38°57'46"N
Longitude: 77°46'8"W
Decimal Degree (lat, lon): 38.962777777778,-77.768888888889

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	Amorphous	Amphibole	Apatite	Apophyllite	Aragonite	Baryte	Beryl	Calcite	Chalcopyrite
Chlorite	Clay	Clinozoisite	Copper	Corundum	Epidote	Ettringite	Feldspar	Fluorite	Gadolinite
Garnet	Gyrolite	Harmotome	Malachite	Marcasite	Meneghinite	Molybdenite	Mordenite	Natrolite	None
Not in a structural group	Pectolite	Prehnite	Pyrite	Pyroxene	Quartz	Rhodonite	Rocksalt	Rutile	Sphalerite
Spinel	Stilpnomelane	Talc	Thomsonite	Titanite	Vesuvianite	Wollastonite	Wurtzite	Zircon

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 B Ba Bi C Ca Cd Cl Cr Cu F Fe H K Mg Mo Na O P Pb S Si Ti Y Zn Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Amorphous Amphibole Apatite Apophyllite Aragonite Baryte Beryl Calcite Chalcopyrite
Chlorite Clay Clinozoisite Copper Corundum Epidote Ettringite Feldspar Fluorite Gadolinite
Garnet Gyrolite Harmotome Malachite Marcasite Meneghinite Molybdenite Mordenite Natrolite None
Not in a structural group Pectolite Prehnite Pyrite Pyroxene Quartz Rhodonite Rocksalt Rutile Sphalerite
Spinel Stilpnomelane Talc Thomsonite Titanite Vesuvianite Wollastonite Wurtzite Zircon

71 IMA Minerals at location:

Actinolite ()*	Aikinite ()*	Albite ()*	Andradite ()*	Anhydrite ()*
Aragonite ()*	Augite ()*	Azurite ()*	Babingtonite ()*	Baryte ()*
Bornite ()*	Calcite ()*	Chalcocite ()*	Chalcopyrite ()*	Chlorapatite ()*
Chromite ()*	Chrysocolla ()*	Clinochlore ()*	Clinozoisite ()*	Cordierite ()*
Cuprite ()*	Datolite ()*	Diopside ()*	Dolomite ()*	Epidote ()*
Epistilbite ()*	Fluorapatite ()*	Fluorapophyllite-(K) ()*	Fluorite ()*	Galena ()*
Gold ()*	Goosecreekite ()*	Greenockite ()*	Grossular ()*	Gyrolite ()*
Harmotome ()*	Hematite ()*	Hydroxyapophyllite-(K) ()*	Ilmenite ()*	Kainosite-(Y) ()*
Laumontite ()*	Loudounite ()*	Magnetite ()*	Malachite ()*	Marcasite ()*
Molybdenite ()*	Mordenite ()*	Natrolite ()*	Opal ()*	Pectolite ()*
Pigeonite ()*	Prehnite ()*	Pseudomalachite ()*	Pyrite ()*	Quartz ()*
Riebeckite ()*	Rutile ()*	Silver ()*	Sphalerite ()*	Stilpnomelane ()*
Talc ()*	Thaumasite ()*	Thomsonite-Ca ()*	Titanite ()*	Tremolite ()*
Vesuvianite ()*	Wollastonite ()*	Wurtzite ()*	Xenotime-(Y) ()*	Xonotlite ()*
Zircon ()*

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	6	281700,281702,281706,281710,281712,281722	3419
Aikinite ()*	Meneghinite	CuPbBiS₃	1	281677	315
Albite ()*	Feldspar	Na(AlSi₃O₈)	3	281679,281700,281701	8803
Andradite ()*	Garnet	Ca₃Fe³⁺₂(SiO₄)₃	1	281710	1534
Anhydrite ()*	Not in a structural group	Ca(SO₄)	1	281696	1588
Aragonite ()*	Aragonite	Ca(CO₃)	1	281710	3250
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	3	281677,281700,281701	2060
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	4	281679,281681,281696,281712	5509
Babingtonite ()*	Rhodonite	Ca₂Fe²⁺Fe³⁺Si₅O₁₄(OH)	4	281677,281679,281700,281701	161
Baryte ()*	Baryte	Ba(SO₄)	3	281696,281699,281705	11547
Bornite ()*	None	Cu₅FeS₄	3	281679,281702,281720	5516
Calcite ()*	Calcite	Ca(CO₃)	10	281679,281681,281692,281699,281700,281701,281705,281706,281710,281721	27770
Chalcocite ()*	None	Cu₂S	1	281704	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	4	281679,281681,281700,281720	27198
Chlorapatite ()*	Apatite	Ca₅(PO₄)₃Cl	1	281679	203
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	1	281702	3902
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	2	281679,281717	3531
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	5	281679,281699,281701,281705,281710	1756
Clinozoisite ()*	Clinozoisite Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)	3	281677,281701,281722	1025
Cordierite ()*	Beryl	Mg₂Al₄Si₅O₁₈	1	281677	1008
Cuprite ()*	Not in a structural group	Cu₂O	1	281681	2970
Datolite ()*	Gadolinite	CaB(SiO₄)(OH)	8	281679,281682,281699,281700,281701,281705,281721,281722	498
Diopside ()*	Pyroxene	CaMgSi₂O₆	3	281700,281701,281710	4135
Dolomite ()*	None	CaMg(CO₃)₂	2	281679,281706	9895
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	9	281675,281679,281681,281700,281701,281702,281704,281706,281710	8173
Epistilbite ()*	Mordenite	Ca₃[Si₁₈Al₆O₄₈]·16H₂O	1	281701	138
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	1	281700	2740
Fluorapophyllite-(K) ()*	Apophyllite	KCa₄Si₈O₂₀F·8H₂O	1	281679	303
Fluorite ()*	Fluorite	CaF₂	1	281710	9617
Galena ()*	Rocksalt	PbS	4	281679,281700,281720,281722	24243
Gold ()*	Copper	Au	1	281707	30554
Goosecreekite ()*	None	Ca(Si₆Al₂)O₁₆·5H₂O	1	281700	13
Greenockite ()*	Wurtzite	CdS	2	281679,281692	717
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃	2	281706,281710	1544
Gyrolite ()*	Gyrolite	NaCa₁₆(Si₂₃Al)O₆₀(OH)₈·14H₂O	2	281677,281679	142
Harmotome ()*	Harmotome	Ba₂(Si₁₂Al₄)O₃₂·12H₂O	1	281701	290
Hematite ()*	Corundum	Fe₂O₃	6	281677,281679,281681,281697,281702,281712	14640
Hydroxyapophyllite-(K) ()*	Apophyllite	KCa₄Si₈O₂₀(OH,F)·8H₂O	7	281677,281679,281699,281700,281701,281721,281722	85
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	2	281675,281720	5433
Kainosite-(Y) ()*	None	Ca₂Y₂(SiO₃)₄(CO₃)·H₂O	1	281700	99
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	6	281677,281679,281700,281701,281704,281722	1271
Loudounite ()*	None	NaCa₅Zr₄Si₁₆O₄₀(OH)₁₁·8H₂O	1	281700	2
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	4	281701,281706,281710,281712	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	5	281679,281700,281702,281704,281717	12537
Marcasite ()*	Marcasite	FeS₂	1	281679	5674
Molybdenite ()*	Molybdenite	MoS₂	1	281679	5800
Mordenite ()*	Mordenite	(Na₂,Ca,K₂)₄(Al₈Si₄₀)O₉₆·28H₂O	1	281700	405
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O	3	281679,281700,281701	1236
Opal ()*	Amorphous	SiO₂·nH₂O	3	281679,281701,281722	2994
Pectolite ()*	Pectolite	NaCa₂Si₃O₈(OH)	1	281679	363
Pigeonite ()*	Pyroxene	(Mg,Fe,Ca)₂Si₂O₆	1	281701	303
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂	5	281677,281679,281700,281721,281722	1898
Pseudomalachite ()*	None	Cu₅(PO₄)₂(OH)₄	2	281696,281717	369
Pyrite ()*	Pyrite	FeS₂	4	281679,281681,281702,281712	39462
Quartz ()*	Quartz	SiO₂	11	281679,281681,281683,281686,281690,281693,281700,281701,281702,281712,281720	61156
Riebeckite ()*	Amphibole	Na₂(Fe²⁺₃Fe³⁺₂)Si₈O₂₂(OH)₂	1	281679	375
Rutile ()*	Rutile	TiO₂	1	281679	5614
Silver ()*	Copper	Ag	3	281679,281681,281722	5186
Sphalerite ()*	Sphalerite	ZnS	5	281679,281700,281701,281720,281722	21482
Stilpnomelane ()*	Stilpnomelane Clay	(K,Ca,Na)(Fe,Mg,Al)₈(Si,Al)₁₂(O,OH)₃₆·nH₂O	1	281682	456
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	2	281702,281710	3337
Thaumasite ()*	Ettringite	Ca₃Si(OH)₆(CO₃)(SO₄)·12H₂O	3	281679,281701,281721	183
Thomsonite-Ca ()*	Thomsonite	NaCa₂(Al₅Si₅)O₂₀·6H₂O	1	281700	452
Titanite ()*	Titanite	CaTi(SiO₄)O	4	281679,281700,281701,281710	4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	3	281679,281710,281712	2562
Vesuvianite ()*	Vesuvianite	(Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀	3	281698,281699,281705	1395
Wollastonite ()*	Wollastonite	CaSiO₃	3	281698,281699,281705	1247
Wurtzite ()*	Wurtzite	ZnS	1	281701	372
Xenotime-(Y) ()*	Zircon	Y(PO₄)	1	281696	939
Xonotlite ()*	None	Ca₆Si₆O₁₇(OH)₂	3	281696,281699,281705	109
Zircon ()*	Zircon	Zr(SiO₄)	2	281696,281700	5251

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL
R070231	Old Goose Creek Quarry (Arlington Stone Company Quarry; Belmont Quarry), Leesburg, Loudoun Co., Virginia, USA	https://rruff.info/R070231

All locality data graciously provided by mindat.org

All age data...