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Fairfax quarry (Centreville Quarry; Sisslers Quarry), Centreville, Culpeper Basin, Fairfax Co., Virginia, USAi
Regional Level Types
Fairfax quarry (Centreville Quarry; Sisslers Quarry)Quarry
Centreville- not defined -
Culpeper BasinBasin
Fairfax Co.County
VirginiaState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84):
38° 49' 32'' North , 77° 29' 26'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Sudley16,203 (2011)3.7km
Loch Lomond3,701 (2011)4.5km
West Gate8,046 (2006)4.8km
Manassas Park15,726 (2017)5.0km
Yorkshire7,541 (2011)5.2km


A trap rock quarry in both diabase and hornfels.

World-famous for exceptional apophyllite-(KOH) crystals. Meier and Kearns (2011) determined much if not all of northern Virginia apophyllite is uniformly near end-member apophyllite-(KOH) and verified its occurrence at this locality. (Lance Kearns, personal communication, 2011).

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


42 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: Minerals of Virginia 1990 by R. V. Dietrich
Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Sauktown Sales
Albite
Formula: Na(AlSi3O8)
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
'Amphibole Supergroup var: Byssolite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Penick, D. Allen Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals. Virginia Division of Mineral Resources. 33-1: 1-10.
Analcime
Formula: Na(AlSi2O6) · H2O
Reference: No reference listed
'Ancylite' ?
Reference: Minerals of Virginia 1990 by R. V. Dietrich; Canadian Mineralogist(1983) 21, 37-40
Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Anhydrite
Formula: CaSO4
Reference: Minerals of Virginia 1990 by R. V. Dietrich
Anorthite
Formula: Ca(Al2Si2O8)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Anorthite var: Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: Minerals of Virginia 1990 by R. V. Dietrich
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Minerals of Virginia 1990 by R. V. Dietrich; Canadian Mineralogist(1983) 21, 37-40
Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Reference: Minerals of Virginia 1990 by R. V. Dietrich
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Bornite
Formula: Cu5FeS4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
'Chabazite'
Reference: D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
Chalcanthite
Formula: CuSO4 · 5H2O
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Chalcocite
Formula: Cu2S
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chlorapatite
Formula: Ca5(PO4)3Cl
Reference: Minerals of Virginia (1990) by R. V. Dietrich; D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
'Chlorite Group'
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Cuprobismutite
Formula: Cu8AgBi13S24
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Datolite
Formula: CaB(SiO4)(OH)
Reference: D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
Diopside
Formula: CaMgSi2O6
Reference: Minerals of Virginia 1990 by R. V. Dietrich
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
Reference: Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25--27.
Galena
Formula: PbS
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Greenockite
Formula: CdS
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Hematite
Formula: Fe2O3
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Hydroxyapophyllite-(K)
Formula: KCa4(Si8O20)(OH,F) · 8H2O
Reference: Meier, B. M. and Kearns, Lance E., 2011, Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O, 38th Rochester Mineralogical Symposium Progran and Abstracts, p. 25--27.
Ilmenite
Formula: Fe2+TiO3
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Jamesonite ?
Formula: Pb4FeSb6S14
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
'K Feldspar'
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Minerals of Virginia, 1990 by R. V. Dietrich; D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
Loudounite
Formula: NaCa5Zr4Si16O40(OH)11 · 8H2O
Reference: Minerals of Virginia, 1990 by R. V. Dietrich; Canadian Mineralogist(1983) 21, 37-40
Magnetite
Formula: Fe2+Fe3+2O4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Mesolite
Formula: Na2Ca2Si9Al6O30 · 8H2O
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
Okenite
Formula: Ca10Si18O46 · 18H2O
Reference: Minerals of Virginia 1990 by R. V. Dietrich; D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
Pectolite
Formula: NaCa2Si3O8(OH)
Reference: Minerals of Virginia 1990 by R. V. Dietrich
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Rocks & Min.:60:166.; Canadian Mineralogist(1983) 21, 37-40
Quartz
Formula: SiO2
Reference: Minerals of Virginia 1990 by R. V. Dietrich; Canadian Mineralogist(1983) 21, 37-40
Silver
Formula: Ag
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Sphalerite
Formula: ZnS
Reference: Minerals of Virginia 1990 by R. V. Dietrich
Stellerite
Formula: Ca4(Si28Al8)O72 · 28H2O
Reference: analyzed by Lance Kearns, James Madison University
'Stilbite subgroup'
Reference: D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
Thaumasite
Formula: Ca3(SO4)[Si(OH)6](CO3) · 12H2O
Reference: Handbook of Mineralogy; D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10
Titanite
Formula: CaTi(SiO4)O
Reference: Minerals of Virginia 1990 by R. V. Dietrich; Canadian Mineralogist(1983) 21, 37-40
Wittichenite
Formula: Cu3BiS3
Reference: [MinRec 3:177, 3:179]
Wurtzite
Formula: (Zn,Fe)S
Reference: Minerals of Virginia 1990 by R. V. Dietrich; D. Allen Penick, Jr. (1987) Virginia Mineral Locality Index. Virginia Minerals:Virginia Division of Mineral Resources. 33-1:1-10

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
Acanthite2.BA.35Ag2S
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Cuprobismutite2.JA.10aCu8AgBi13S24
Galena2.CD.10PbS
Greenockite2.CB.45CdS
Jamesonite ?2.HB.15Pb4FeSb6S14
Sphalerite2.CB.05aZnS
Wittichenite2.GA.20Cu3BiS3
Wurtzite2.CB.45(Zn,Fe)S
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anhydrite7.AD.30CaSO4
Chalcanthite7.CB.20CuSO4 · 5H2O
Thaumasite7.DG.15Ca3(SO4)[Si(OH)6](CO3) · 12H2O
Group 8 - Phosphates, Arsenates and Vanadates
Chlorapatite8.BN.05Ca5(PO4)3Cl
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
Analcime9.GB.05Na(AlSi2O6) · H2O
Andradite9.AD.25Ca3Fe3+2(SiO4)3
Anorthite9.FA.35Ca(Al2Si2O8)
var: Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Babingtonite9.DK.05Ca2(Fe,Mn)FeSi5O14(OH)
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Datolite9.AJ.20CaB(SiO4)(OH)
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fluorapophyllite-(K) ?9.EA.15KCa4(Si8O20)(F,OH) · 8H2O
Hydroxyapophyllite-(K)9.EA.15KCa4(Si8O20)(OH,F) · 8H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Loudounite9.HF.10NaCa5Zr4Si16O40(OH)11 · 8H2O
Mesolite9.GA.05Na2Ca2Si9Al6O30 · 8H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Okenite9.EA.40Ca10Si18O46 · 18H2O
Pectolite9.DG.05NaCa2Si3O8(OH)
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Stellerite9.GE.15Ca4(Si28Al8)O72 · 28H2O
Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Ancylite' ?-
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chabazite'-
'Chlorite Group'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Greenockite2.8.7.2CdS
Sphalerite2.8.2.1ZnS
Wurtzite2.8.7.1(Zn,Fe)S
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 3 - SULFOSALTS
ø = 3
Wittichenite3.4.8.1Cu3BiS3
2 < ø < 2.49
Jamesonite ?3.6.7.1Pb4FeSb6S14
1 < ø < 2
Cuprobismutite3.8.2.1Cu8AgBi13S24
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anhydrite28.3.2.1CaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Chalcanthite29.6.7.1CuSO4 · 5H2O
Group 32 - COMPOUND SULFATES
Hydrated Compound Sulfates containing Hydroxyl or Halogen
Thaumasite32.4.4.4Ca3(SO4)[Si(OH)6](CO3) · 12H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Chlorapatite41.8.1.2Ca5(PO4)3Cl
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(OH)
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Clinozoisite58.2.1a.4{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 59 - CYCLOSILICATES Three-Membered Rings
Three-Membered Rings, hydrated
Loudounite59.2.2.5NaCa5Zr4Si16O40(OH)11 · 8H2O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Single-Width Unbranched Chains, W=1 with chains P=3
Pectolite65.2.1.4aNaCa2Si3O8(OH)
Single-Width Unbranched Chains, W=1 with chains P=5
Babingtonite65.4.1.2Ca2(Fe,Mn)FeSi5O14(OH)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
Fluorapophyllite-(K) ?72.3.1.1KCa4(Si8O20)(F,OH) · 8H2O
Okenite72.3.2.5Ca10Si18O46 · 18H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Mesolite77.1.5.4Na2Ca2Si9Al6O30 · 8H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Stellerite77.1.4.4Ca4(Si28Al8)O72 · 28H2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Ancylite' ?-
Anorthite-Ca(Al2Si2O8)
var: Labradorite-(Ca,Na)[Al(Al,Si)Si2O8]
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chabazite'-
'Chlorite Group'-
Hydroxyapophyllite-(K)-KCa4(Si8O20)(OH,F) · 8H2O
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H PrehniteCa2Al2Si3O10(OH)2
H LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
H Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H AnalcimeNa(AlSi2O6) · H2O
H BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
H DatoliteCaB(SiO4)(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H LaumontiteCaAl2Si4O12 · 4H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H OkeniteCa10Si18O46 · 18H2O
H ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
H Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H ApatiteCa5(PO4)3(Cl/F/OH)
H ChalcanthiteCuSO4 · 5H2O
H Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H MalachiteCu2(CO3)(OH)2
H MesoliteNa2Ca2Si9Al6O30 · 8H2O
H PectoliteNaCa2Si3O8(OH)
H StelleriteCa4(Si28Al8)O72 · 28H2O
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
C MalachiteCu2(CO3)(OH)2
OOxygen
O PrehniteCa2Al2Si3O10(OH)2
O LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
O TitaniteCaTi(SiO4)O
O Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O AnalcimeNa(AlSi2O6) · H2O
O BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
O ChlorapatiteCa5(PO4)3Cl
O DatoliteCaB(SiO4)(OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O LaumontiteCaAl2Si4O12 · 4H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O OkeniteCa10Si18O46 · 18H2O
O QuartzSiO2
O ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
O Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O MagnetiteFe2+Fe23+O4
O Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O ApatiteCa5(PO4)3(Cl/F/OH)
O AnhydriteCaSO4
O ChalcanthiteCuSO4 · 5H2O
O Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O K Feldspar (var: Adularia)KAlSi3O8
O AlbiteNa(AlSi3O8)
O AndraditeCa3Fe23+(SiO4)3
O HematiteFe2O3
O IlmeniteFe2+TiO3
O MalachiteCu2(CO3)(OH)2
O MesoliteNa2Ca2Si9Al6O30 · 8H2O
O PectoliteNaCa2Si3O8(OH)
O DiopsideCaMgSi2O6
O StelleriteCa4(Si28Al8)O72 · 28H2O
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O AnorthiteCa(Al2Si2O8)
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
FFluorine
F Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F ApatiteCa5(PO4)3(Cl/F/OH)
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
NaSodium
Na LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
Na AnalcimeNa(AlSi2O6) · H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Na AlbiteNa(AlSi3O8)
Na MesoliteNa2Ca2Si9Al6O30 · 8H2O
Na PectoliteNaCa2Si3O8(OH)
MgMagnesium
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg DiopsideCaMgSi2O6
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
AlAluminium
Al PrehniteCa2Al2Si3O10(OH)2
Al Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al AnalcimeNa(AlSi2O6) · H2O
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Al Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al K Feldspar (var: Adularia)KAlSi3O8
Al AlbiteNa(AlSi3O8)
Al MesoliteNa2Ca2Si9Al6O30 · 8H2O
Al StelleriteCa4(Si28Al8)O72 · 28H2O
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al AnorthiteCa(Al2Si2O8)
SiSilicon
Si PrehniteCa2Al2Si3O10(OH)2
Si LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
Si TitaniteCaTi(SiO4)O
Si Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si AnalcimeNa(AlSi2O6) · H2O
Si BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Si DatoliteCaB(SiO4)(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si LaumontiteCaAl2Si4O12 · 4H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si OkeniteCa10Si18O46 · 18H2O
Si QuartzSiO2
Si ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
Si Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si K Feldspar (var: Adularia)KAlSi3O8
Si AlbiteNa(AlSi3O8)
Si AndraditeCa3Fe23+(SiO4)3
Si MesoliteNa2Ca2Si9Al6O30 · 8H2O
Si PectoliteNaCa2Si3O8(OH)
Si DiopsideCaMgSi2O6
Si StelleriteCa4(Si28Al8)O72 · 28H2O
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si AnorthiteCa(Al2Si2O8)
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
PPhosphorus
P ChlorapatiteCa5(PO4)3Cl
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S WitticheniteCu3BiS3
S ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
S Wurtzite(Zn,Fe)S
S BorniteCu5FeS4
S ChalcopyriteCuFeS2
S AcanthiteAg2S
S AnhydriteCaSO4
S ChalcanthiteCuSO4 · 5H2O
S ChalcociteCu2S
S CuprobismutiteCu8AgBi13S24
S GalenaPbS
S GreenockiteCdS
S SphaleriteZnS
S JamesonitePb4FeSb6S14
ClChlorine
Cl Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl ChlorapatiteCa5(PO4)3Cl
Cl ApatiteCa5(PO4)3(Cl/F/OH)
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K K Feldspar (var: Adularia)KAlSi3O8
K Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
CaCalcium
Ca PrehniteCa2Al2Si3O10(OH)2
Ca LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
Ca TitaniteCaTi(SiO4)O
Ca BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Ca ChlorapatiteCa5(PO4)3Cl
Ca DatoliteCaB(SiO4)(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca OkeniteCa10Si18O46 · 18H2O
Ca ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2O
Ca Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Ca Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca AnhydriteCaSO4
Ca Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca AndraditeCa3Fe23+(SiO4)3
Ca MesoliteNa2Ca2Si9Al6O30 · 8H2O
Ca PectoliteNaCa2Si3O8(OH)
Ca DiopsideCaMgSi2O6
Ca StelleriteCa4(Si28Al8)O72 · 28H2O
Ca AnorthiteCa(Al2Si2O8)
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
TiTitanium
Ti TitaniteCaTi(SiO4)O
Ti Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti IlmeniteFe2+TiO3
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MnManganese
Mn BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
FeIron
Fe BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe MagnetiteFe2+Fe23+O4
Fe AndraditeCa3Fe23+(SiO4)3
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe JamesonitePb4FeSb6S14
CuCopper
Cu WitticheniteCu3BiS3
Cu BorniteCu5FeS4
Cu ChalcopyriteCuFeS2
Cu ChalcanthiteCuSO4 · 5H2O
Cu ChalcociteCu2S
Cu CuprobismutiteCu8AgBi13S24
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn Wurtzite(Zn,Fe)S
Zn SphaleriteZnS
ZrZirconium
Zr LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
AgSilver
Ag SilverAg
Ag AcanthiteAg2S
Ag CuprobismutiteCu8AgBi13S24
CdCadmium
Cd GreenockiteCdS
SbAntimony
Sb JamesonitePb4FeSb6S14
PbLead
Pb GalenaPbS
Pb JamesonitePb4FeSb6S14
BiBismuth
Bi WitticheniteCu3BiS3
Bi CuprobismutiteCu8AgBi13S24

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Early Jurassic
174.1 - 201.3 Ma



ID: 2456020
high-titanium quartz normative diabase

Age: Early Jurassic (174.1 - 201.3 Ma)

Description: Light- to dark-gray and dark-greenish-gray, chiefly medium-crystalline and porphyritic, but finely crystalline and aphanitic near chilled margins and in narrow dikes. Deeply weathered to orange-brown saprolite more than 6 m (20 ft) thick on uplands. Diabase of at least three principal magma types: 1) in places aphanitic diabase (Jdqh) encloses light- and dark-gray, layered, orthopyroxene-rich cumulate plugs and sheets; elsewhere encloses sheets containing light- and medium-gray, medium- to coarse-crystalline ferrogabbro, ferrodiorite, and pegmatoid, pinkish-gray to dark pink porphyritic granophyre and syenite, and finely crystalline aplite. Both types of diabase are magmatic derivatives of high TiO2, quartz-normative tholeiite (HTQ); unit Jdh is mainly an interlocking crystalline mosaic of calcic plagioclase and pyroxene. Differentiated sheets locally exceed 600 m (2000 ft) in thickness and dikes vary from a wedge-edge to 150 m (500 ft) wide. A whole-rock sample from unaltered diabase has yielded a nearly concordant 40Ar/39Ar age spectrum with a well-defined plateau age of 201.2+1.3 Ma (Sutter, 1988). This Early Jurassic age is interpreted to be a close approximation to the time of igneous intrusion, differentiation, and crystallization of the Centreville HTQ sheet and related diabase (Sutter, 1988). Another whole-rock sample from fresh LTQ diabase yielded a nearly concordant 40Ar/39Ar age spectrum with a fairly well-defined plateau age of 199.3+3.0 Ma for the Catlett sheet (Sutter, 1985). These age estimates are analytically indistinguishable, so at least to the temporal resolution possible by the 40Ar/39Ar technique, HTQ and LTQ diabase in the Culpeper basin are coeval.

Comments: gray, black; Dominant fractures folation; No fossils; differentiates of diabase sills; used for aggregate

Lithology: Diabase

Reference: Davis, A.M., C.S. Southworth, J.E. Reddy, J.S. Schindler. Geologic Map Database of the Washington DC Area Featuring Data from Three 30 x 60 Minute Quadrangles: Frederick, Washington West, and Fredericksburg. U.S. Geological Survey Open-File Report 01-227. [69]

Early Jurassic
174.1 - 201.3 Ma



ID: 2761386
Diabase

Age: Early Jurassic (174.1 - 201.3 Ma)

Description: Fine- to coarsely-crystalline, subaphanitic or porphyritic with aphanitic margins; dark-gray mosaic of plagioclase laths and clinopyroxene, with some masses characterized by olivine or bronzite, others granophyric. Also occurs as dikes and sills in the Valley and Ridge, Piedmont, and Blue Ridge physiographic provinces.

Comments: Coastal Plain Original map source: Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000.

Lithology: Major:{basalt}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Triassic
201.3 - 251.902 Ma



ID: 3186382
Mesozoic intrusive rocks

Age: Triassic (201.3 - 251.902 Ma)

Comments: Culpeper Subbasin

Lithology: Intrusive igneous rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Gooch, E.O., Wood, R.S., and Parrott, W.T. (1960) Sources of aggregate.
Rocks & Minerals (xxxx) 60, 166.
Medici, John C. (1972) Minerals of the Fairfax Quarry, Centreville, Virginia. Mineralogical Record, 3, 173-179.
Sweet, P.C. (1980) Directory of the Mineral Industry-1979. Virginia Division of Mineral Resources, 55 pp.
Meier, B. M. and Kearns, Lance E. (2011) Chemical Characterization of Northern Virginia Apophyllite, (K, Na)Ca4Si8)20(OH, F).8H2O. 38th Rochester Mineralogical Symposium Program and Abstracts, 25-27.


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