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Salem, Essex Co., Massachusetts, USAi
Regional Level Types
Salem- not defined -
Essex Co.County
MassachusettsState
USACountry

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Latitude & Longitude (WGS84): 42° 31' 10'' North , 70° 53' 50'' West
Latitude & Longitude (decimal): 42.51944,-70.89722
GeoHash:G#: drt9fsqjw
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Salem42,869 (2017)0.0km
Peabody52,504 (2017)2.7km
Marblehead19,808 (2017)3.9km
South Peabody50,293 (2017)4.4km
Beverly41,186 (2017)4.6km


Salem was incorporated as a town in 1629. It is now a city. Authors such as Warren and Palache (1911) through Lyons (1976) published chemical analyses showing that Massachusetts "arfvedsonite-riebeckite" series amphiboles should be simply labeled "riebeckite".

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

32 valid minerals.

Detailed Mineral List:

Aegirine
Formula: NaFe3+Si2O6
Colour: green
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Reference: Washington H., 1898. The Journal of Geology, v. VI
Aenigmatite
Formula: Na4[Fe2+10Ti2]O4[Si12O36]
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Albite
Formula: Na(AlSi3O8)
Analcime
Formula: Na(AlSi2O6) · H2O
Reference: P Cristofono collection, 2009
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Colour: black
Reference: P Cristofono collection, 2008
Anorthite
Formula: Ca(Al2Si2O8)
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197, 198, 206.
Anorthite var: Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197, 198, 206.
'Apatite'
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197, 198, 206.
Arfvedsonite ?
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Description: The presence of such a sodic amphibole in this rock is unproven. Analyses by Lyons (1976) show compositions in the riebeckite field, which are sodic enough to approach but not cross into the arfvedsonite field. (Original reference cited is a secondary source and known for uncritical listings.)
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
'Biotite'
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
Cancrinite
Formula: (Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
'Delessite'
Formula: (Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Dolomite
Formula: CaMg(CO3)2
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Enstatite
Formula: MgSiO3
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
'Fayalite-Forsterite Series'
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
'Feldspar Group'
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
'Feldspar Group var: Perthite'
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Ferro-hornblende
Formula: ☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197, 198, 206.
Glaucophane ?
Formula: ◻[Na2][Mg3Al2]Si8O22(OH)2
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
Hematite
Formula: Fe2O3
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
'Hornblende'
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
'Hypersthene'
Formula: (Mg,Fe)SiO3
Låvenite ?
Formula: (Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
Reference: Washington H., 1898. The Journal of Geology, v. VI
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197, 198, 206.
Magnetite var: Titaniferous Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Reference: Sears, JH, 1905, Geology of Essex County, Mass.
Microcline
Formula: K(AlSi3O8)
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Molybdenite
Formula: MoS2
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Nepheline
Formula: Na3K(Al4Si4O16)
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
Opal
Formula: SiO2 · nH2O
Reference: P Cristofono collection , 2009
Opal var: Opal-AN
Formula: SiO2 · nH2O
Reference: P Cristofono collection , 2009
Orthoclase
Formula: K(AlSi3O8)
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
Pyrite
Formula: FeS2
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
Sanidine
Formula: K(AlSi3O8)
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Sodalite
Formula: Na8(Al6Si6O24)Cl2
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.
Titanite
Formula: CaTi(SiO4)O
Zircon
Formula: Zr(SiO4)
Reference: Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.197-198.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
var: Titaniferous Magnetite4.BB.05Fe2+(Fe3+,Ti)2O4
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Group 5 - Nitrates and Carbonates
Dolomite5.AB.10CaMg(CO3)2
Group 9 - Silicates
Aegirine9.DA.25NaFe3+Si2O6
Aegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Aenigmatite9.DH.40Na4[Fe2+10Ti2]O4[Si12O36]
Albite9.FA.35Na(AlSi3O8)
Analcime9.GB.05Na(AlSi2O6) · H2O
Annite9.EC.20KFe2+3(AlSi3O10)(OH)2
Anorthite9.FA.35Ca(Al2Si2O8)
var: Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Arfvedsonite ?9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Cancrinite9.FB.05(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Chrysotile9.ED.15Mg3(Si2O5)(OH)4
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Enstatite9.DA.05MgSiO3
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ferro-hornblende9.DE.10☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Glaucophane ?9.DE.25◻[Na2][Mg3Al2]Si8O22(OH)2
Låvenite ?9.BE.17(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
Microcline9.FA.30K(AlSi3O8)
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Nepheline9.FA.05Na3K(Al4Si4O16)
Orthoclase9.FA.30K(AlSi3O8)
Riebeckite9.DE.25◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Sanidine9.FA.30K(AlSi3O8)
Sodalite9.FB.10Na8(Al6Si6O24)Cl2
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Biotite'-
'Delessite'-(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
'Fayalite-Forsterite Series'-
'Feldspar Group'-
'var: Perthite'-
'Hornblende'-
'Hypersthene'-(Mg,Fe)SiO3
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
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 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Låvenite ?56.2.4.4(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
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 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Aegirine65.1.3c.2NaFe3+Si2O6
Aegirine-augite65.1.3b.2(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Enstatite65.1.2.1MgSiO3
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Glaucophane ?66.1.3c.1◻[Na2][Mg3Al2]Si8O22(OH)2
Group 69 - INOSILICATES Chains with Side Branches or Loops
Chains with Side Branches or Loops with P>2
Aenigmatite69.2.1a.1Na4[Fe2+10Ti2]O4[Si12O36]
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Annite71.2.2b.3KFe2+3(AlSi3O10)(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
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)
Sanidine76.1.1.2K(AlSi3O8)
Al-Si Framework Feldspathoids and related species
Cancrinite76.2.5.3(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Nepheline76.2.1.2Na3K(Al4Si4O16)
Sodalite76.2.3.1Na8(Al6Si6O24)Cl2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
Anorthite-Ca(Al2Si2O8)
var: Labradorite-(Ca,Na)[Al(Al,Si)Si2O8]
'Apatite'-
Arfvedsonite ?-[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
'Biotite'-
'Delessite'-(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
'Fayalite-Forsterite Series'-
'Feldspar Group'-
'var: Perthite'-
Ferro-hornblende-☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
'Hornblende'-
'Hypersthene'-(Mg,Fe)SiO3
'Limonite'-(Fe,O,OH,H2O)
Magnetite
var: Titaniferous Magnetite
-Fe2+(Fe3+,Ti)2O4
Opal
var: Opal-AN
-SiO2 · nH2O
Riebeckite-◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2

List of minerals for each chemical element

HHydrogen
H Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
H Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
H Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
H NatroliteNa2Al2Si3O10 · 2H2O
H ChrysotileMg3(Si2O5)(OH)4
H Limonite(Fe,O,OH,H2O)
H Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H AnniteKFe32+(AlSi3O10)(OH)2
H AnalcimeNa(AlSi2O6) · H2O
H Opal (var: Opal-AN)SiO2 · nH2O
H ClinochloreMg5Al(AlSi3O10)(OH)8
H OpalSiO2 · nH2O
H Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
H Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
H Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
CCarbon
C Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
C DolomiteCaMg(CO3)2
OOxygen
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O AegirineNaFe3+Si2O6
O OrthoclaseK(AlSi3O8)
O NephelineNa3K(Al4Si4O16)
O Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
O SodaliteNa8(Al6Si6O24)Cl2
O Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
O ZirconZr(SiO4)
O Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
O Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
O MagnetiteFe2+Fe23+O4
O NatroliteNa2Al2Si3O10 · 2H2O
O EnstatiteMgSiO3
O ChrysotileMg3(Si2O5)(OH)4
O MicroclineK(AlSi3O8)
O AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
O SanidineK(AlSi3O8)
O DolomiteCaMg(CO3)2
O Limonite(Fe,O,OH,H2O)
O HematiteFe2O3
O Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
O Hypersthene(Mg,Fe)SiO3
O AlbiteNa(AlSi3O8)
O TitaniteCaTi(SiO4)O
O Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
O AnniteKFe32+(AlSi3O10)(OH)2
O AnalcimeNa(AlSi2O6) · H2O
O Opal (var: Opal-AN)SiO2 · nH2O
O AnorthiteCa(Al2Si2O8)
O ClinochloreMg5Al(AlSi3O10)(OH)8
O OpalSiO2 · nH2O
O Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
O Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
O Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
FFluorine
F Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
NaSodium
Na AegirineNaFe3+Si2O6
Na NephelineNa3K(Al4Si4O16)
Na Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Na SodaliteNa8(Al6Si6O24)Cl2
Na Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Na Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Na NatroliteNa2Al2Si3O10 · 2H2O
Na AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Na AlbiteNa(AlSi3O8)
Na Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Na AnalcimeNa(AlSi2O6) · H2O
Na Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Na Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Na Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
MgMagnesium
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg EnstatiteMgSiO3
Mg ChrysotileMg3(Si2O5)(OH)4
Mg DolomiteCaMg(CO3)2
Mg Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Mg Hypersthene(Mg,Fe)SiO3
Mg Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
AlAluminium
Al OrthoclaseK(AlSi3O8)
Al NephelineNa3K(Al4Si4O16)
Al SodaliteNa8(Al6Si6O24)Cl2
Al Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Al Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Al Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Al NatroliteNa2Al2Si3O10 · 2H2O
Al MicroclineK(AlSi3O8)
Al SanidineK(AlSi3O8)
Al Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Al AlbiteNa(AlSi3O8)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Al AnniteKFe32+(AlSi3O10)(OH)2
Al AnalcimeNa(AlSi2O6) · H2O
Al AnorthiteCa(Al2Si2O8)
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
SiSilicon
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si AegirineNaFe3+Si2O6
Si OrthoclaseK(AlSi3O8)
Si NephelineNa3K(Al4Si4O16)
Si Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Si SodaliteNa8(Al6Si6O24)Cl2
Si Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Si ZirconZr(SiO4)
Si Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Si Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Si NatroliteNa2Al2Si3O10 · 2H2O
Si EnstatiteMgSiO3
Si ChrysotileMg3(Si2O5)(OH)4
Si MicroclineK(AlSi3O8)
Si AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Si SanidineK(AlSi3O8)
Si Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Si Hypersthene(Mg,Fe)SiO3
Si AlbiteNa(AlSi3O8)
Si TitaniteCaTi(SiO4)O
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Si AnniteKFe32+(AlSi3O10)(OH)2
Si AnalcimeNa(AlSi2O6) · H2O
Si Opal (var: Opal-AN)SiO2 · nH2O
Si AnorthiteCa(Al2Si2O8)
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si OpalSiO2 · nH2O
Si Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Si Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Si Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
SSulfur
S Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
S MolybdeniteMoS2
S PyriteFeS2
ClChlorine
Cl SodaliteNa8(Al6Si6O24)Cl2
KPotassium
K OrthoclaseK(AlSi3O8)
K NephelineNa3K(Al4Si4O16)
K MicroclineK(AlSi3O8)
K SanidineK(AlSi3O8)
K AnniteKFe32+(AlSi3O10)(OH)2
CaCalcium
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Ca Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Ca Anorthite (var: Labradorite)(Ca,Na)[Al(Al,Si)Si2O8]
Ca DolomiteCaMg(CO3)2
Ca TitaniteCaTi(SiO4)O
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Ca AnorthiteCa(Al2Si2O8)
Ca Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
TiTitanium
Ti AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Ti TitaniteCaTi(SiO4)O
Ti Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
Ti Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
MnManganese
Mn Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
FeIron
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe AegirineNaFe3+Si2O6
Fe Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Fe Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Fe MagnetiteFe2+Fe23+O4
Fe AenigmatiteNa4[Fe102+Ti2]O4[Si12O36]
Fe PyriteFeS2
Fe Limonite(Fe,O,OH,H2O)
Fe HematiteFe2O3
Fe Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
Fe Hypersthene(Mg,Fe)SiO3
Fe Magnetite (var: Titaniferous Magnetite)Fe2+(Fe3+,Ti)2O4
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Fe AnniteKFe32+(AlSi3O10)(OH)2
Fe Arfvedsonite[Na][Na2][Fe42+Fe3+]Si8O22(OH)2
Fe Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
ZrZirconium
Zr ZirconZr(SiO4)
Zr Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
NbNiobium
Nb Låvenite(Na,Ca)2(Mn2+,Fe2+)(Zr,Ti)(Si2O7)(O,OH,F)2
MoMolybdenum
Mo MolybdeniteMoS2

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

Paleozoic
251.902 - 541 Ma



ID: 3191988
Paleozoic intrusive rocks

Age: Phanerozoic (251.902 - 541 Ma)

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]

Neoproterozoic
541 - 1000 Ma



ID: 2965439
Diorite and gabbro

Age: Neoproterozoic (541 - 1000 Ma)

Description: Complex of diorite and gabbro, subordinate metavolcanic rocks and intrusive granite and granodiorite.

Comments: Part of Milford-Dedham Zone (Tertiary and Older Rocks) Original map source: Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon of Boston College in 1998; based on the 1983 USGS paper version (MA002).

Lithology: Major:{diorite,gabbro}, Incidental:{granite, granodiorite, metavolcanic}

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]

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

Localities in this Region
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