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Middletown, Newport Co., Rhode Island, USAi
Regional Level Types
Middletown- not defined -
Newport Co.County
Rhode IslandState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84): 41° 30' 42'' North , 71° 17' 12'' West
Latitude & Longitude (decimal): 41.51167,-71.28667
GeoHash:G#: drmk1ufwu
Köppen climate type:Cfa : Humid subtropical climate


Middletown is a town, incorporated in 1743.

Regions containing this locality

North America Plate

Plate - 4,949 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

10 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: AmMin 12:427-436 (1927)
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: AmMin 12:427-436 (1927)
'Biotite'
'Chlorite Group'
'Flint'
Reference: Miller, 1972. Minerals of Rhode Island.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: AmMin 12:427-436 (1927)
Hematite
Formula: Fe2O3
Reference: AmMin 12:427-436 (1927)
'Hornblende'
Reference: AmMin 12:427-436 (1927)
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: AmMin 12:427-436 (1927)
Magnetite
Formula: Fe2+Fe3+2O4
Reference: AmMin 12:427-436 (1927)
Microcline
Formula: K(AlSi3O8)
Pyrite
Formula: FeS2
Reference: AmMin 12:427-436 (1927)
Quartz
Formula: SiO2
Reference: AmMin 12:427-436 (1927)
Quartz var: Carnelian
Reference: Miller, 1972. Minerals of Rhode Island.
Quartz var: Chalcedony
Formula: SiO2
Reference: Miller, 1972. Minerals of Rhode Island.
Rutile
Formula: TiO2
Reference: AmMin 12:427-436 (1927)
Talc
Formula: Mg3Si4O10(OH)2
Reference: AmMin 12:427-436 (1927)
Zoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var: Carnelian4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Rutile4.DB.05TiO2
Group 9 - Silicates
'Actinolite'9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Augite'9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Microcline9.FA.30K(AlSi3O8)
Talc9.EC.05Mg3Si4O10(OH)2
Zoisite9.BG.10{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
'Biotite'-
Chlorite Group-
Flint-
Garnet Group-X3Z2(SiO4)3
Hornblende-
Limonite-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
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)
Zoisite58.2.1b.1{Ca2}{Al3}(Si2O7)(SiO4)O(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
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
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
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Biotite'-
'Chlorite Group'-
'Flint'-
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
Quartz
var: Carnelian
-SiO2
var: Chalcedony-SiO2

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Limonite(Fe,O,OH,H2O)
H TalcMg3Si4O10(OH)2
H Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Quartz (var: Chalcedony)SiO2
O Garnet GroupX3Z2(SiO4)3
O HematiteFe2O3
O Limonite(Fe,O,OH,H2O)
O MagnetiteFe2+Fe23+O4
O MicroclineK(AlSi3O8)
O QuartzSiO2
O RutileTiO2
O TalcMg3Si4O10(OH)2
O Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg TalcMg3Si4O10(OH)2
AlAluminium
Al MicroclineK(AlSi3O8)
Al Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Quartz (var: Chalcedony)SiO2
Si Garnet GroupX3Z2(SiO4)3
Si MicroclineK(AlSi3O8)
Si QuartzSiO2
Si TalcMg3Si4O10(OH)2
Si Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
SSulfur
S PyriteFeS2
KPotassium
K MicroclineK(AlSi3O8)
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
TiTitanium
Ti RutileTiO2
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2

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: 2802712
Narragansett Bay Group - Purgatory Conglomerate

Age: Pennsylvanian (298.9 - 323.2 Ma)

Stratigraphic Name: Purgatory Conglomerate

Description: Buff to pale-gray conglomerate. Clasts consist entirely of quartzite; matrix primarily quartz, plus sparse amounts of magnetite. Cobbles and boulders are ubiquitously elongate, due to pressure-solution phenomena associated with deformation.

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: Major:{conglomerate}

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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USA

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