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Cranston, Providence Co., Rhode Island, USA

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Latitude & Longitude (WGS84): 41° 46' 45'' North , 71° 26' 15'' West
Latitude & Longitude (decimal): 41.77917,-71.43750
GeoHash:G#: drmjwmsv3
Köppen climate type:Cfa : Humid subtropical climate


Cranston was established as a town in 1754, and as a city in 1910.

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

41 valid minerals.

Detailed Mineral List:

Acanthite
Formula: Ag2S
Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Miller, 1972. Minerals of Rhode Island.
'Amphibole Supergroup var: Uralite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Miller, 1972. Minerals of Rhode Island.
Anatase
Formula: TiO2
Anglesite
Formula: PbSO4
Axinite-(Fe)
Formula: Ca2Fe2+Al2BSi4O15OH
'Biotite'
Bornite
Formula: Cu5FeS4
Calcite
Formula: CaCO3
Cerussite
Formula: PbCO3
Chalcopyrite
Formula: CuFeS2
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
'commodity:Coal'
Copper
Formula: Cu
Covellite
Formula: CuS
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fluorapatite
Formula: Ca5(PO4)3F
Fluorite
Formula: CaF2
Galena
Formula: PbS
Goethite
Formula: α-Fe3+O(OH)
Graphite
Formula: C
'commodity:Graphite'
Hematite
Formula: Fe2O3
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Hydrocerussite
Formula: Pb3(CO3)2(OH)2
Ilmenite
Formula: Fe2+TiO3
'commodity:Iron'
Formula: Fe
'K Feldspar'
'K Feldspar var: Adularia'
Formula: KAlSi3O8
'Limonite'
Formula: (Fe,O,OH,H2O)
Magnetite
Formula: Fe2+Fe3+2O4
Marcasite
Formula: FeS2
Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
Molybdenite
Formula: MoS2
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Orthoclase
Formula: K(AlSi3O8)
Ottrélite
Formula: (Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Phosgenite
Formula: Pb2CO3Cl2
Pyrite
Formula: FeS2
Pyromorphite
Formula: Pb5(PO4)3Cl
Pyrrhotite
Formula: Fe7S8
Quartz
Formula: SiO2
Quartz var: Smoky Quartz
Formula: SiO2
Silver
Formula: Ag
'Soapstone'
Sphalerite
Formula: ZnS
Stolzite
Formula: Pb(WO4)
Talc
Formula: Mg3Si4O10(OH)2
Talc var: Steatite
Formula: Mg3(Si4O10)(OH)2
Titanite
Formula: CaTi(SiO4)O
'Turgite'
'Wad'
Wulfenite
Formula: Pb(MoO4)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
'Copper'1.AA.05Cu
'Graphite'1.CB.05aC
'Silver'1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
'Acanthite'2.BA.35Ag2S
'Bornite'2.BA.15Cu5FeS4
'Chalcopyrite'2.CB.10aCuFeS2
'Covellite'2.CA.05aCuS
'Galena'2.CD.10PbS
'Marcasite'2.EB.10aFeS2
'Molybdenite'2.EA.30MoS2
'Pyrite'2.EB.05aFeS2
'Pyrrhotite'2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 3 - Halides
'Fluorite'3.AB.25CaF2
Group 4 - Oxides and Hydroxides
'Anatase'4.DD.05TiO2
'Goethite'4.00.α-Fe3+O(OH)
'Hematite'4.CB.05Fe2O3
'Ilmenite'4.CB.05Fe2+TiO3
'Magnetite'4.BB.05Fe2+Fe3+2O4
'Quartz'4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
'Cerussite'5.AB.15PbCO3
'Hydrocerussite'5.BE.10Pb3(CO3)2(OH)2
'Phosgenite'5.BE.20Pb2CO3Cl2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Anglesite'7.AD.35PbSO4
'Melanterite'7.CB.35Fe2+(H2O)6SO4 · H2O
Stolzite7.GA.05Pb(WO4)
'Wulfenite'7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
'Fluorapatite'8.BN.05Ca5(PO4)3F
'Pyromorphite'8.BN.05Pb5(PO4)3Cl
Group 9 - Silicates
'Actinolite'9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Axinite-(Fe)'9.BD.20Ca2Fe2+Al2BSi4O15OH
'Chrysocolla'9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
'Clinochlore'9.EC.55Mg5Al(AlSi3O10)(OH)8
'Epidote'9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
'Hemimorphite'9.BD.10Zn4Si2O7(OH)2 · H2O
'Montmorillonite'9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
'Orthoclase'9.FA.30K(AlSi3O8)
'Ottrélite'9.AF.85(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
var: Steatite9.EC.05Mg3(Si4O10)(OH)2
Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Uralite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Biotite'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
Soapstone-
Turgite-
'Wad'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Silver1.1.1.2Ag
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Acanthite2.4.1.1Ag2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Anatase4.4.4.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Hydrocerussite16a.2.2.1Pb3(CO3)2(OH)2
Phosgenite16a.3.4.1Pb2CO3Cl2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anglesite28.3.1.3PbSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Melanterite29.6.10.1Fe2+(H2O)6SO4 · H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Pyromorphite41.8.4.1Pb5(PO4)3Cl
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Stolzite48.1.3.2Pb(WO4)
Wulfenite48.1.3.1Pb(MoO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Ottrélite52.3.3.3(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
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] coordination
Hemimorphite56.1.2.1Zn4Si2O7(OH)2 · H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Axinite-(Fe)56.2.2.1Ca2Fe2+Al2BSi4O15OH
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 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Talc71.2.1.3Mg3Si4O10(OH)2
Sheets of 6-membered rings with 2:1 clays
Montmorillonite71.3.1a.2(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
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
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Rocks, 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: Uralite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Biotite'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
Quartz
var: Smoky Quartz
-SiO2
'Soapstone'-
Talc
var: Steatite
-Mg3(Si4O10)(OH)2
'Turgite'-
'Wad'-

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H ClinochloreMg5Al(AlSi3O10)(OH)8
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Goethiteα-Fe3+O(OH)
H HemimorphiteZn4Si2O7(OH)2 · H2O
H HydrocerussitePb3(CO3)2(OH)2
H Limonite(Fe,O,OH,H2O)
H MelanteriteFe2+(H2O)6SO4 · H2O
H Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
H Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
H Talc (var: Steatite)Mg3(Si4O10)(OH)2
H TalcMg3Si4O10(OH)2
H Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
BBoron
B Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
CCarbon
C CalciteCaCO3
C CerussitePbCO3
C GraphiteC
C HydrocerussitePb3(CO3)2(OH)2
C PhosgenitePb2CO3Cl2
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O K Feldspar (var: Adularia)KAlSi3O8
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O AnataseTiO2
O AnglesitePbSO4
O Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
O CalciteCaCO3
O CerussitePbCO3
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O ClinochloreMg5Al(AlSi3O10)(OH)8
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O FluorapatiteCa5(PO4)3F
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O HemimorphiteZn4Si2O7(OH)2 · H2O
O HydrocerussitePb3(CO3)2(OH)2
O IlmeniteFe2+TiO3
O Limonite(Fe,O,OH,H2O)
O MagnetiteFe2+Fe23+O4
O MelanteriteFe2+(H2O)6SO4 · H2O
O Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
O OrthoclaseK(AlSi3O8)
O Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
O PhosgenitePb2CO3Cl2
O PyromorphitePb5(PO4)3Cl
O QuartzSiO2
O Quartz (var: Smoky Quartz)SiO2
O Talc (var: Steatite)Mg3(Si4O10)(OH)2
O StolzitePb(WO4)
O TalcMg3Si4O10(OH)2
O TitaniteCaTi(SiO4)O
O Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O WulfenitePb(MoO4)
FFluorine
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
F Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
NaSodium
Na Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Mg Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Mg Talc (var: Steatite)Mg3(Si4O10)(OH)2
Mg TalcMg3Si4O10(OH)2
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Al OrthoclaseK(AlSi3O8)
Al Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Al Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si K Feldspar (var: Adularia)KAlSi3O8
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si HemimorphiteZn4Si2O7(OH)2 · H2O
Si Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Si OrthoclaseK(AlSi3O8)
Si Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Si QuartzSiO2
Si Quartz (var: Smoky Quartz)SiO2
Si Talc (var: Steatite)Mg3(Si4O10)(OH)2
Si TalcMg3Si4O10(OH)2
Si TitaniteCaTi(SiO4)O
Si Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
PPhosphorus
P FluorapatiteCa5(PO4)3F
P PyromorphitePb5(PO4)3Cl
SSulfur
S AcanthiteAg2S
S AnglesitePbSO4
S BorniteCu5FeS4
S ChalcopyriteCuFeS2
S CovelliteCuS
S GalenaPbS
S MarcasiteFeS2
S MelanteriteFe2+(H2O)6SO4 · H2O
S MolybdeniteMoS2
S PyriteFeS2
S PyrrhotiteFe7S8
S SphaleriteZnS
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl PhosgenitePb2CO3Cl2
Cl PyromorphitePb5(PO4)3Cl
Cl Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
Ca Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Ca TitaniteCaTi(SiO4)O
TiTitanium
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti AnataseTiO2
Ti IlmeniteFe2+TiO3
Ti TitaniteCaTi(SiO4)O
Ti Amphibole Supergroup (var: Uralite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MnManganese
Mn Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe Limonite(Fe,O,OH,H2O)
Fe MagnetiteFe2+Fe23+O4
Fe MarcasiteFeS2
Fe MelanteriteFe2+(H2O)6SO4 · H2O
Fe Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
CuCopper
Cu BorniteCu5FeS4
Cu ChalcopyriteCuFeS2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu CopperCu
Cu CovelliteCuS
ZnZinc
Zn HemimorphiteZn4Si2O7(OH)2 · H2O
Zn SphaleriteZnS
MoMolybdenum
Mo MolybdeniteMoS2
Mo WulfenitePb(MoO4)
AgSilver
Ag AcanthiteAg2S
Ag SilverAg
WTungsten
W StolzitePb(WO4)
PbLead
Pb AnglesitePbSO4
Pb CerussitePbCO3
Pb GalenaPbS
Pb HydrocerussitePb3(CO3)2(OH)2
Pb PhosgenitePb2CO3Cl2
Pb PyromorphitePb5(PO4)3Cl
Pb StolzitePb(WO4)
Pb WulfenitePb(MoO4)

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

Pennsylvanian
298.9 - 323.2 Ma



ID: 3184341
Paleozoic sedimentary rocks

Age: Pennsylvanian (298.9 - 323.2 Ma)

Comments: Narragansett And Boston Basins

Lithology: Sedimentary 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]

Pennsylvanian
298.9 - 323.2 Ma



ID: 2987449
Narragansett Bay Group - Rhode Island Formation

Age: Pennsylvanian (298.9 - 323.2 Ma)

Stratigraphic Name: Rhode Island Formation

Description: In northern Rhode Island, consists of gray to black, fine- to coarse-grained quartz arenite, litharenite, shale, and conglomerate, with minor beds of anthracite and meta-anthracite. In southern Rhode Island, consists of meta-sandstone, meta-conglomerate, schist, carbonaceous schist, and graphite. Plant fossils are common.

Comments: Part of Esmond-Dedham Subterrane. Narragansett Bay Group - deposited upon older rocks of both West Bay and East Bay parts of the Esmond-Dedham subterrane. Original map source: Hermes, O.D., Gromet, L.P., Murray, D.P., and Hamidzada, N.A., 1994, Bedrock Geology of Rhode Island; s44gbr95, Geological Survey of Rhode Island, scale 1:100,000.

Lithology: Incidental:{anthracite}

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

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