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New Goose Creek Quarry (Luck Company Quarry), Leesburg, Loudoun Co., Virginia, USAi
Regional Level Types
New Goose Creek Quarry (Luck Company Quarry)Quarry
Leesburg- not defined -
Loudoun Co.County
VirginiaState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84):
39° 4' 7'' North , 77° 30' 58'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Belmont5,966 (2011)0.7km
Ashburn43,511 (2015)3.7km
Broadlands12,313 (2011)5.6km
University Center3,586 (2011)6.3km
Leesburg51,209 (2017)6.6km


Ref.: Rocks & Minerals: 60: 167.

Located near Belmont Station, Loudoun Co., VA. Owned by the Luck Company. Produces aggregate in diabase traprock. Started 1972.

Known for exceptional apophyllite-(KOH) crystals. Meier and Kearns (2011) determined much if not all of the northern Virginia are 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


25 valid minerals. 2 (TL) - type locality of valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Canadian Mineralogist(1983) 21, 37-40
Albite
Formula: Na(AlSi3O8)
Reference: Canadian Mineralogist(1983) 21, 37-40
'Ancylite'
Reference: Canadian Mineralogist(1983) 21, 37-40
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Description: Occurs in cavities and fractures in basaltic trap rock.
Reference: Rocks & Min.:60:167.
Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Calcite
Formula: CaCO3
Reference: Lapis 28(12), 9 (2003); Canadian Mineralogist(1983) 21, 37-40
Chalcopyrite
Formula: CuFeS2
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
'Chlorite Group'
Reference: Canadian Mineralogist(1983) 21, 37-40
Datolite
Formula: CaB(SiO4)(OH)
Description: Occurs in cavities and fractures in basaltic trap rock.
Reference: Rocks & Min.:60:167.
Diopside
Formula: CaMgSi2O6
Description: Occurs in cavities and fractures in basaltic trap rock.
Reference: Rocks & Min.:60:167.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Canadian Mineralogist(1983) 21, 37-40
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Minerals of Virginia 1990 by R. V. Dietrich
Galena
Formula: PbS
Goosecreekite (TL)
Formula: Ca[Al2Si6O16] · 5H2O
Type Locality:
Description: Occurs in cavities and fractures in basaltic trap rock.
Reference: Canadian Mineralogist(1980) 18, 323-327; Rocks & Min.:60:167.; Canadian Mineralogist(1983) 21, 37-40
'Hornblende'
Description: Occurs in cavities and fractures in basaltic trap rock.
Reference: Rocks & Min.:60:167.
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.
Kainosite-(Y)
Formula: Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Description: Occurs in cavities and fractures in basaltic trap rock.
Reference: Rocks & Min.:60:167.
Loudounite (TL)
Formula: NaCa5Zr4Si16O40(OH)11 · 8H2O
Type Locality:
Description: Occurs in cavities and fractures in basaltic trap rock.
Reference: Canadian Mineralogist(1983) 21, 37-40; Rocks & Min.:60:167.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Mordenite
Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Reference: Minerals of Virginia 1990 by R. V. Dietrich
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Minerals of Virginia 1990 by R. V. Dietrich
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Canadian Mineralogist(1983) 21, 37-40
Quartz
Formula: SiO2
Reference: Canadian Mineralogist(1983) 21, 37-40
Sphalerite
Formula: ZnS
'Stilbite subgroup'
Reference: Canadian Mineralogist(1983) 21, 37-40
Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
Description: Occurs in cavities and fractures in basaltic trap rock.
Reference: Rocks & Min.:60:167.
Titanite
Formula: CaTi(SiO4)O
Zircon
Formula: Zr(SiO4)
Reference: Canadian Mineralogist(1983) 21, 37-40

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Babingtonite9.DK.05Ca2(Fe,Mn)FeSi5O14(OH)
Datolite9.AJ.20CaB(SiO4)(OH)
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Goosecreekite (TL)9.GB.25Ca[Al2Si6O16] · 5H2O
Hydroxyapophyllite-(K)9.EA.15KCa4(Si8O20)(OH,F) · 8H2O
Kainosite-(Y)9.CF.10Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Loudounite (TL)9.HF.10NaCa5Zr4Si16O40(OH)11 · 8H2O
Mordenite9.GD.35(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Thomsonite-Ca9.GA.10NaCa2[Al5Si5O20] · 6H2O
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Ancylite'-
'Chlorite Group'-
'Hornblende'-
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
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)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 59 - CYCLOSILICATES Three-Membered Rings
Three-Membered Rings, hydrated
Loudounite (TL)59.2.2.5NaCa5Zr4Si16O40(OH)11 · 8H2O
Group 60 - CYCLOSILICATES Four-Membered Rings
Four-Membered Rings with other anion groups
Kainosite-(Y)60.2.1.1Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Diopside65.1.3a.1CaMgSi2O6
Single-Width Unbranched Chains, W=1 with chains P=5
Babingtonite65.4.1.2Ca2(Fe,Mn)FeSi5O14(OH)
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
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
Goosecreekite (TL)77.1.7.3Ca[Al2Si6O16] · 5H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Mordenite77.1.6.1(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Ancylite'-
'Chlorite Group'-
'Hornblende'-
Hydroxyapophyllite-(K)-KCa4(Si8O20)(OH,F) · 8H2O
'Stilbite subgroup'-
Thomsonite-Ca-NaCa2[Al5Si5O20] · 6H2O

List of minerals for each chemical element

HHydrogen
H GoosecreekiteCa[Al2Si6O16] · 5H2O
H LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
H Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
H DatoliteCaB(SiO4)(OH)
H LaumontiteCaAl2Si4O12 · 4H2O
H Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H PrehniteCa2Al2Si3O10(OH)2
H Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
H MalachiteCu2(CO3)(OH)2
H Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
H NatroliteNa2Al2Si3O10 · 2H2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
C Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
C MalachiteCu2(CO3)(OH)2
OOxygen
O GoosecreekiteCa[Al2Si6O16] · 5H2O
O LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
O DatoliteCaB(SiO4)(OH)
O DiopsideCaMgSi2O6
O LaumontiteCaAl2Si4O12 · 4H2O
O Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
O TitaniteCaTi(SiO4)O
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O QuartzSiO2
O AlbiteNa(AlSi3O8)
O PrehniteCa2Al2Si3O10(OH)2
O CalciteCaCO3
O FluorapatiteCa5(PO4)3F
O Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
O MalachiteCu2(CO3)(OH)2
O Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O ZirconZr(SiO4)
FFluorine
F Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
F FluorapatiteCa5(PO4)3F
NaSodium
Na LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
Na Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Na AlbiteNa(AlSi3O8)
Na Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg DiopsideCaMgSi2O6
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
AlAluminium
Al GoosecreekiteCa[Al2Si6O16] · 5H2O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al AlbiteNa(AlSi3O8)
Al PrehniteCa2Al2Si3O10(OH)2
Al Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
SiSilicon
Si GoosecreekiteCa[Al2Si6O16] · 5H2O
Si LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Si DatoliteCaB(SiO4)(OH)
Si DiopsideCaMgSi2O6
Si LaumontiteCaAl2Si4O12 · 4H2O
Si Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Si TitaniteCaTi(SiO4)O
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si QuartzSiO2
Si AlbiteNa(AlSi3O8)
Si PrehniteCa2Al2Si3O10(OH)2
Si Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
Si Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si ZirconZr(SiO4)
PPhosphorus
P FluorapatiteCa5(PO4)3F
SSulfur
S GalenaPbS
S SphaleriteZnS
S ChalcopyriteCuFeS2
KPotassium
K Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
K Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
CaCalcium
Ca GoosecreekiteCa[Al2Si6O16] · 5H2O
Ca LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Hydroxyapophyllite-(K)KCa4(Si8O20)(OH,F) · 8H2O
Ca DatoliteCaB(SiO4)(OH)
Ca DiopsideCaMgSi2O6
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Ca TitaniteCaTi(SiO4)O
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca PrehniteCa2Al2Si3O10(OH)2
Ca CalciteCaCO3
Ca FluorapatiteCa5(PO4)3F
Ca Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
Ca Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
TiTitanium
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
FeIron
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS
YYttrium
Y Kainosite-(Y)Ca2(Y,Ce)2(Si4O12)(CO3) · H2O
ZrZirconium
Zr LoudouniteNaCa5Zr4Si16O40(OH)11 · 8H2O
Zr ZirconZr(SiO4)
PbLead
Pb GalenaPbS

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: 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]

Early Jurassic
174.1 - 201.3 Ma



ID: 2460117
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]

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)
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.


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