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Delaware, USAi
Regional Level Types
DelawareState
USACountry

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Lock Map
Historical workings of former Brandywine Quarry, Wilmington, DE

Brandywine Quarry, Wilmington, New Castle Co., Delaware, USA
Neighbouring regions:
Locality type:State
Largest Settlements:
PlacePopulation
Wilmington71,948 (2017)
Dover37,522 (2017)
Newark33,817 (2017)
Middletown20,372 (2017)
Bear19,371 (2011)
Brookside14,353 (2011)
Museums in region:


One of the thirteen original states of the USA.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

39 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Schenck, W. M. Plank & L. Srogi (2000) Bedrock geologic map of the Piedmont of Delaware (2000) : Delaware Geological Survey GM 10 http://www.dgs.udel.edu/sites/dgs.udel.edu/files/publications/geomap10.pdf
Albite
Formula: Na(AlSi3O8)
Reference: Yale Peabody Museum
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Yale Peabody Museum
'Albite-Anorthite Series'
Almandine ?
Formula: Fe2+3Al2(SiO4)3
Habit: crude dodecahedral
Colour: very dark red/black
Fluorescence: none
Description: From my personal mineral experience and my specimens from this site, the garnets appear to be almandine. Small crystals are considered rare and a lucky find, so these large crystals (up to over 1") are probably the best from the locale.
Reference: "Arthur Koch - collection"
'Amber'
Reference: World of Amber
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: Van Gosen, Bradley S. (2005) Reported historic asbestos mines, historic asbestos prospects, and natural asbestos occurrences in the eastern United States. USGS Open-File Report 2005-1189.
'Apatite'
Reference: Yale Peabody Museum
'Asbestos'
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Van Gosen, Bradley S. (2005) Reported historic asbestos mines, historic asbestos prospects, and natural asbestos occurrences in the eastern United States. USGS Open-File Report 2005-1189.
Beryl
Formula: Be3Al2(Si6O18)
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Reference: Delaware Geological Survey
'Biotite'
Bornite
Formula: Cu5FeS4
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
Calcite
Formula: CaCO3
'Chabazite'
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
Chalcocite
Formula: Cu2S
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
Chalcopyrite
Formula: CuFeS2
'Chlorite Group'
Reference: Rocks & Min.: 21:280-281.
Chromite
Formula: Fe2+Cr3+2O4
Habit: massive
Colour: metallic black
Description: Probably magnesiochromite
Reference: Harold Moritz collection
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: Dana 6:1070.
'Clinopyroxene Subgroup'
Reference: Schenck, W. M. Plank & L. Srogi (2000) Bedrock geologic map of the Piedmont of Delaware (2000) : Delaware Geological Survey GM 10 http://www.dgs.udel.edu/sites/dgs.udel.edu/files/publications/geomap10.pdf
Corundum
Formula: Al2O3
'Deweylite'
Formula: Mg4Si3O10 · 6H2O ?
Reference: Dana 6: 1070.
Diopside
Formula: CaMgSi2O6
Reference: Dana 6: 1070.
Enstatite
Formula: MgSiO3
Reference: Dana 6:1070.
'Fayalite-Forsterite Series'
'Feldspar Group'
Fluorapatite
Formula: Ca5(PO4)3F
Fluorapatite var: Mn-bearing Fluorapatite
Formula: (Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Reference: Dana (1893) Textbook of Mineralogy 17th ed.
'Garnet Group'
Formula: X3Z2(SiO4)3
'Glauconite'
Formula: (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Reference: Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1070.
Goethite
Formula: α-Fe3+O(OH)
Reference: Schenck, W. M. Plank & L. Srogi (2000) Bedrock geologic map of the Piedmont of Delaware (2000) : Delaware Geological Survey GM 10 http://www.dgs.udel.edu/sites/dgs.udel.edu/files/publications/geomap10.pdf
Grossular
Formula: Ca3Al2(SiO4)3
Reference: Dana 6:446.
Hematite
Formula: Fe2O3
Reference: Schenck, W. M. Plank & L. Srogi (2000) Bedrock geologic map of the Piedmont of Delaware (2000) : Delaware Geological Survey GM 10 http://www.dgs.udel.edu/sites/dgs.udel.edu/files/publications/geomap10.pdf
Hisingerite
Formula: Fe3+2(Si2O5)(OH)4 · 2H2O
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
'Hornblende'
'Hypersthene'
Formula: (Mg,Fe)SiO3
Kyanite
Formula: Al2(SiO4)O
Reference: Dana 6:1070.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
'Limonite'
Formula: (Fe,O,OH,H2O)
Magnesite
Formula: MgCO3
Magnetite
Formula: Fe2+Fe3+2O4
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Univ. of DE Irnee duPont Mineral Museum specimen
Marcasite
Formula: FeS2
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
'Mica Group'
Reference: Dana 6: 1070.
Microcline
Formula: K(AlSi3O8)
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
'Ochre'
Orthoclase
Formula: K(AlSi3O8)
Reference: Rocks & Min.: 21:280-281.
Pyrite
Formula: FeS2
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
Pyrrhotite
Formula: Fe7S8
Reference: Rocks & Min.:11:216; 21:280-281; AmMin:9(1924):1-5.
Quartz
Formula: SiO2
Localities: Reported from at least 8 localities in this region.
Quartz var: Jasper
Reference: Schenck, W. M. Plank & L. Srogi (2000) Bedrock geologic map of the Piedmont of Delaware (2000) : Delaware Geological Survey GM 10 http://www.dgs.udel.edu/sites/dgs.udel.edu/files/publications/geomap10.pdf
Quartz var: Smoky Quartz
Formula: SiO2
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Serpentine Subgroup var: Marmolite'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: Van Gosen, Bradley S. (2005) Reported historic asbestos mines, historic asbestos prospects, and natural asbestos occurrences in the eastern United States. USGS Open-File Report 2005-1189.
Sillimanite
Formula: Al2(SiO4)O
Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: Delaware Geological Survey Collection
'Stilbite subgroup'
Talc
Formula: Mg3Si4O10(OH)2
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Dana 6: 1070.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Vivianite
Formula: Fe2+3(PO4)2 · 8H2O
Reference: Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1070; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 745.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Marcasite2.EB.10aFeS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Corundum4.CB.05Al2O3
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var: Jasper4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Magnesite5.AB.05MgCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
var: Mn-bearing Fluorapatite8.BN.05(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Vivianite8.CE.40Fe2+3(PO4)2 · 8H2O
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Almandine ?9.AD.25Fe2+3Al2(SiO4)3
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
Chrysotile9.ED.15Mg3(Si2O5)(OH)4
Diopside9.DA.15CaMgSi2O6
Enstatite9.DA.05MgSiO3
Grossular9.AD.25Ca3Al2(SiO4)3
Hisingerite9.ED.10Fe3+2(Si2O5)(OH)4 · 2H2O
Kyanite9.AF.15Al2(SiO4)O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Orthoclase9.FA.30K(AlSi3O8)
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Sillimanite9.AF.05Al2(SiO4)O
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Talc9.EC.05Mg3Si4O10(OH)2
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Amber'-
'Apatite'-
'Asbestos'-
'Biotite'-
'Chabazite'-
'Chlorite Group'-
'Clinopyroxene Subgroup'-
'Deweylite'-Mg4Si3O10 · 6H2O ?
'Fayalite-Forsterite Series'-
'Feldspar Group'-
'Garnet Group'-X3Z2(SiO4)3
'Glauconite'-(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
'Hornblende'-
'Hypersthene'-(Mg,Fe)SiO3
'Limonite'-(Fe,O,OH,H2O)
'Mica Group'-
'Ochre'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'var: Marmolite'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Stilbite subgroup'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Magnesite14.1.1.2MgCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
A3(XO4)2·xH2O
Vivianite40.3.6.1Fe2+3(PO4)2 · 8H2O
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] and >[6] coordination
Almandine ?51.4.3a.2Fe2+3Al2(SiO4)3
Grossular51.4.3b.2Ca3Al2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(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 [4] and >[4] coordination
Kyanite52.2.2c.1Al2(SiO4)O
Sillimanite52.2.2a.1Al2(SiO4)O
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
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
Enstatite65.1.2.1MgSiO3
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Hisingerite71.1.5.2Fe3+2(Si2O5)(OH)4 · 2H2O
Sheets of 6-membered rings with 2:1 layers
'Glauconite'71.2.2a.5(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(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)
Microcline76.1.1.5K(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Albite-Anorthite Series'-
'Amber'-
'Apatite'-
'Asbestos'-
Beryl
var: Aquamarine
-Be3Al2Si6O18
'Biotite'-
'Chabazite'-
'Chlorite Group'-
'Clinopyroxene Subgroup'-
'Deweylite'-Mg4Si3O10 · 6H2O ?
'Fayalite-Forsterite Series'-
'Feldspar Group'-
Fluorapatite
var: Mn-bearing Fluorapatite
-(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
'Hypersthene'-(Mg,Fe)SiO3
'Limonite'-(Fe,O,OH,H2O)
'Mica Group'-
'Ochre'-
Quartz
var: Jasper
-SiO2
var: Smoky Quartz-SiO2
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'var: Marmolite'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Stilbite subgroup'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H Limonite(Fe,O,OH,H2O)
H Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
H ChrysotileMg3(Si2O5)(OH)4
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H VivianiteFe32+(PO4)2 · 8H2O
H Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
H DeweyliteMg4Si3O10 · 6H2O ?
H MuscoviteKAl2(AlSi3O10)(OH)2
H MalachiteCu2(CO3)(OH)2
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H TalcMg3Si4O10(OH)2
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H Goethiteα-Fe3+O(OH)
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
BeBeryllium
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Aquamarine)Be3Al2Si6O18
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
CCarbon
C CalciteCaCO3
C MagnesiteMgCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O FluorapatiteCa5(PO4)3F
O CalciteCaCO3
O HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
O LaumontiteCaAl2Si4O12 · 4H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O QuartzSiO2
O Limonite(Fe,O,OH,H2O)
O GrossularCa3Al2(SiO4)3
O BerylBe3Al2(Si6O18)
O Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
O MagnesiteMgCO3
O ChrysotileMg3(Si2O5)(OH)4
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O KyaniteAl2(SiO4)O
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O EnstatiteMgSiO3
O VivianiteFe32+(PO4)2 · 8H2O
O Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
O DeweyliteMg4Si3O10 · 6H2O ?
O DiopsideCaMgSi2O6
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O Garnet GroupX3Z2(SiO4)3
O OrthoclaseK(AlSi3O8)
O Quartz (var: Smoky Quartz)SiO2
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Beryl (var: Aquamarine)Be3Al2Si6O18
O SpessartineMn32+Al2(SiO4)3
O SillimaniteAl2(SiO4)O
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O MalachiteCu2(CO3)(OH)2
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O CorundumAl2O3
O MagnetiteFe2+Fe23+O4
O TalcMg3Si4O10(OH)2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O ChromiteFe2+Cr23+O4
O HematiteFe2O3
O Goethiteα-Fe3+O(OH)
O Hypersthene(Mg,Fe)SiO3
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O AlbiteNa(AlSi3O8)
O AlmandineFe32+Al2(SiO4)3
FFluorine
F FluorapatiteCa5(PO4)3F
F Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
NaSodium
Na NatroliteNa2Al2Si3O10 · 2H2O
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg MagnesiteMgCO3
Mg ChrysotileMg3(Si2O5)(OH)4
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg EnstatiteMgSiO3
Mg Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Mg DeweyliteMg4Si3O10 · 6H2O ?
Mg DiopsideCaMgSi2O6
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg TalcMg3Si4O10(OH)2
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg Hypersthene(Mg,Fe)SiO3
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
AlAluminium
Al LaumontiteCaAl2Si4O12 · 4H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al GrossularCa3Al2(SiO4)3
Al BerylBe3Al2(Si6O18)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al KyaniteAl2(SiO4)O
Al Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Al OrthoclaseK(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al SpessartineMn32+Al2(SiO4)3
Al SillimaniteAl2(SiO4)O
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Al CorundumAl2O3
Al Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Al AlbiteNa(AlSi3O8)
Al AlmandineFe32+Al2(SiO4)3
SiSilicon
Si HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
Si LaumontiteCaAl2Si4O12 · 4H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si QuartzSiO2
Si GrossularCa3Al2(SiO4)3
Si BerylBe3Al2(Si6O18)
Si ChrysotileMg3(Si2O5)(OH)4
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si KyaniteAl2(SiO4)O
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si EnstatiteMgSiO3
Si Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Si DeweyliteMg4Si3O10 · 6H2O ?
Si DiopsideCaMgSi2O6
Si Garnet GroupX3Z2(SiO4)3
Si OrthoclaseK(AlSi3O8)
Si Quartz (var: Smoky Quartz)SiO2
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si SpessartineMn32+Al2(SiO4)3
Si SillimaniteAl2(SiO4)O
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si TalcMg3Si4O10(OH)2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si Hypersthene(Mg,Fe)SiO3
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si AlbiteNa(AlSi3O8)
Si AlmandineFe32+Al2(SiO4)3
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
P VivianiteFe32+(PO4)2 · 8H2O
SSulfur
S BorniteCu5FeS4
S ChalcociteCu2S
S ChalcopyriteCuFeS2
S MarcasiteFeS2
S PyriteFeS2
S PyrrhotiteFe7S8
ClChlorine
Cl Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
KPotassium
K Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
K OrthoclaseK(AlSi3O8)
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca FluorapatiteCa5(PO4)3F
Ca CalciteCaCO3
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca GrossularCa3Al2(SiO4)3
Ca Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca DiopsideCaMgSi2O6
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
CrChromium
Cr ChromiteFe2+Cr23+O4
MnManganese
Mn Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Mn SpessartineMn32+Al2(SiO4)3
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mn Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
Fe HisingeriteFe23+(Si2O5)(OH)4 · 2H2O
Fe MarcasiteFeS2
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Fe Limonite(Fe,O,OH,H2O)
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe VivianiteFe32+(PO4)2 · 8H2O
Fe Glauconite(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Fe MagnetiteFe2+Fe23+O4
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Fe ChromiteFe2+Cr23+O4
Fe HematiteFe2O3
Fe Goethiteα-Fe3+O(OH)
Fe Hypersthene(Mg,Fe)SiO3
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe AlmandineFe32+Al2(SiO4)3
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Ni Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu BorniteCu5FeS4
Cu ChalcociteCu2S
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Zn Serpentine Subgroup (var: Marmolite)D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Leavens, P. B. (1980) The minerals of Delaware: Delaware Geological Survey: Special Publication.
Picket, T. & D. Windish (compilers) (1992) Delaware: its rocks, minerals and fossils: Delaware Geological Survey: Special Publication, 18 p.
Means, J. (2010) Roadside geology of Maryland, Delaware and Washington, D.C.: Mountain Press Publishers, 346 p.

External Links

Delaware Geological Survey http://www.dgs.udel.edu/

Schenck, W. M. Plank & L. Srogi (2000)Bedrock geologic map of the Piedmont of Delaware (2000) : Delaware Geological Survey GM 10
http://www.dgs.udel.edu/sites/dgs.udel.edu/files/publications/geomap10.pdf


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