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Cheshire, New Haven Co., Connecticut, USAi
Regional Level Types
Cheshire- not defined -
New Haven Co.County
ConnecticutState
USACountry

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Latitude & Longitude (WGS84): 41° 30' North , 72° 54' West
Latitude & Longitude (decimal): 41.50000,-72.90000
GeoHash:G#: drkhj4gg4
Köppen climate type:Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Cheshire29,443 (2017)0.1km
Cheshire Village5,786 (2017)0.3km
Prospect9,476 (2017)6.6km
Wallingford17,712 (2017)8.0km
Wallingford Center18,209 (2017)8.8km


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Regions containing this locality

North America PlateTectonic Plate

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

31 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Allophane
Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: P. Cristofono collection
Analcime
Formula: Na(AlSi2O6) · H2O
Habit: trapezohedra
Colour: white
Description: good though generally small (~1 cm or less) crystals associated with prehnite, natrolite, micro heulandite
Reference: Tschernich, R. (1992): Zeolites of the World, p.65, 114; Rocks & Minerals (1995) 70:396-409
'Apophyllite'
Habit: rectangular prisms with square cross-section and pinacoidal terminations
Colour: chalky white
Description: "Crystalline seams of apophyllite from the Cheshire trap rock quarry were identified by the greenish-white fluorescence of melted portions, under UV." Januzzi (1976). As corroded, chalky white, rectangular prism microcrystals with pinacoid terminations.
Reference: Januzzi, Ronald. (1959): The Minerals of Western Connecticut and Southeastern New York State. Taylor Assoc./Mineralogical Press, Danbury.; Januzzi, Ronald. (1976): Mineral Localities of Connecticut and Southeastern New York State. Taylor Assoc./Mineralogical Press, Danbury.; Harold Moritz collection.
Azurite
Formula: Cu3(CO3)2(OH)2
Baryte
Formula: BaSO4
Localities: Reported from at least 9 localities in this region.
'Biotite'
Habit: micaceous
Colour: black
Description: Fine to coarse-grained component of the schist.
Reference: Harold Moritz collection
Bornite
Formula: Cu5FeS4
Calcite
Formula: CaCO3
Localities: Reported from at least 8 localities in this region.
Cerussite
Formula: PbCO3
Habit: tabular with curved edges, intersecting twins
Colour: white
Description: Micro crystals encrusting tiny galena cubes with malachite, commonly twinned.
Reference: Harold Moritz collection
'Chabazite'
Habit: cyclicly-twinned rhombohedra
Colour: colorless
Description: As glassy, colorless, cyclicly-twinned microcrystals.
Reference: Tschernich, Rudy. (1992), Zeolites of the World. Geoscience Press, Phoenix: 65, 114.
Chalcocite
Formula: Cu2S
Localities: Reported from at least 6 localities in this region.
Chalcopyrite
Formula: CuFeS2
'Chlorite Group' ?
Description: Listed by Januzzi (1976) without details. Either an alteration product or confusion with pumpellyite.
Reference: Tschernich, R. (1992): Zeolites of the World, p.114
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Copper
Formula: Cu
Cuprite
Formula: Cu2O
Datolite
Formula: CaB(SiO4)(OH)
Epidote ?
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Description: Reference provides no details.
Reference: Rocks & Minerals (1995) 70:396-409
Fluorite
Formula: CaF2
Habit: cubic
Colour: colorless, purple tints on edges
Fluorescence: blue
Description: A couple of dozen or so cubic crystals about 7 mm on an edge occur in a pocket in massive quartz and barite with tiny galena cubes encrusted with malachite and cerussite. Some malachite underneath the fluorite crystals imparts a false greenish tinge to them.
Reference: Harold Moritz collection
Galena
Formula: PbS
Habit: cubic
Colour: gray
Description: Isolated cubes to 1 cm in massive quartz with scattered malachite and tiny cubes associated with fluorite.
Reference: Harold Moritz collection
Graphite
Formula: C
Habit: massive
Colour: dark gray
Description: Mostly in a very dark layer easily visible from the ramp.
Reference: Harold Moritz collection
Gypsum
Formula: CaSO4 · 2H2O
Description: "Found as occurring in amygdaloidal cavities" Januzzi (1959)
Reference: Januzzi (1959); Januzzi (1976)
Hematite
Formula: Fe2O3
Colour: red
Description: Mostly earthy material at the pit exposure.
Reference: Harold Moritz collection
'Heulandite subgroup'
Habit: coffin-shaped
Colour: brown
Description: As microcrystals in the usual coffin shape, translucent with numerous inclusions.
Reference: Harold Moritz collection
Kyanite
Formula: Al2(SiO4)O
Habit: eolngated blades
Colour: pale blue
Description: Blades and masses generally less than 10 cm.
Reference: Harold Moritz collection
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Kevin Czaja Collection, Ex: Marcelle Weber Coll: m2677. 9-9-63
Malachite
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 6 localities in this region.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: micaceous
Colour: silvery
Description: Fine- to coarse-grained component of the schist.
Reference: Harold Moritz collection
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Habit: acicular prisms with tetragonal pyramidal terminations
Colour: white
Description: single and bundles of crystals to 1 inch or so, associated with analcime, prehnite, micro heulandite
Reference: Tschernich, R. (1992): Zeolites of the World, p.65; Rocks & Minerals (1995) 70:396-409
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Habit: spherical aggregates
Colour: pale green to blue-green
Description: spherical aggregates with analcime, natrolite and micro heulandite
Reference: Tschernich, R. (1992): Zeolites of the World, p.65, 114; Rocks & Minerals (1995) 70:396-409
'Pumpellyite'
Description: common in local traprock as micro aggregates and druses.
Reference: Rocks & Minerals (1995) 70:396-409
Pyrite
Formula: FeS2
Habit: cubic
Colour: brassy metallic
Description: Very fine-grained drusy coatings and thin films.
Reference: Harold Moritz collection
Quartz
Formula: SiO2
Localities: Reported from at least 8 localities in this region.
Habit: bipyramidal quartzoid
Colour: black
Description: Lustrous black crystals lining fractures in coarse-grained arkosic sandstone from an undisclosed construction site. Collected by mineral dealer Therese Piccioli in the 1990s, very limited number of specimens obtained. Crystals range from 1 to 3 cm and were saved in plates of crystals about 8 to 20 cm long.
Reference: Harold Moritz collection
Quartz var: Agate
Habit: microcrystalline
Description: Lining cavities.
Reference: Januzzi (1959); Januzzi (1976)
Quartz var: Chalcedony
Formula: SiO2
Habit: microcrystalline
Description: Lining cavities.
Reference: Januzzi (1959); Januzzi (1976)
Quartz var: Smoky Quartz
Formula: SiO2
Habit: bipyramidal quartzoid
Colour: black
Description: Lustrous black crystals lining fractures in coarse-grained arkosic sandstone from an undisclosed construction site. Collected by mineral dealer Therese Piccioli in the 1990s, very limited number of specimens obtained. Crystals range from 1 to 3 cm and were saved in plates of crystals about 8 to 20 cm long.
Reference: Harold Moritz collection
Saponite
Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Description: confusion with pumpellyite
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Habit: massive, pseudomorph after unknown mineral
Colour: olive green
Description: A small, 1 cm rectangular pseudomorph of serpentine after an unknown mineral in massive calcite with bornite.
Reference: Former Don Miller collection.
Talc
Formula: Mg3Si4O10(OH)2
Reference: Schairer, John F. (1931): Minerals of Connecticut. Connecticut Geological and Natural History Survey Bulletin 51.
Willemite
Formula: Zn2SiO4
Habit: aggregates of acicular crystals
Colour: white
Fluorescence: green
Description: Solid aggregates to about 1 cm of unterminated clear/white crystals embedded in calcite with bornite, barite, malachite typical of the locality.
Reference: Found by Fred Schuster, former Don Miller collection

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Bornite2.BA.15Cu5FeS4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Cuprite4.AA.10Cu2O
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
var: Agate4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Azurite5.BA.05Cu3(CO3)2(OH)2
Calcite5.AB.05CaCO3
Cerussite5.AB.15PbCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Allophane9.ED.20(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Almandine9.AD.25Fe2+3Al2(SiO4)3
Analcime9.GB.05Na(AlSi2O6) · H2O
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote ?9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Kyanite9.AF.15Al2(SiO4)O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Saponite ?9.EC.45Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
Talc9.EC.05Mg3Si4O10(OH)2
Willemite9.AA.05Zn2SiO4
Unclassified Minerals, Rocks, etc.
'Apophyllite'-
'Biotite'-
'Chabazite'-
'Chlorite Group' ?-
'Heulandite subgroup'-
'Pumpellyite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

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
Semi-metals and non-metals
Graphite1.3.6.2C
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
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
A2X3
Hematite4.3.1.2Fe2O3
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
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [4] coordination
Willemite51.1.1.2Zn2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+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
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)
Epidote ?58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Allophane71.1.5.1(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Sheets of 6-membered rings with 2:1 clays
Saponite ?71.3.1b.2Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
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 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
Albite76.1.3.1Na(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
'Apophyllite'-
'Biotite'-
'Chabazite'-
'Chlorite Group' ?-
'Heulandite subgroup'-
'Pumpellyite'-
Quartz
var: Agate
-SiO2
var: Chalcedony-SiO2
var: Smoky Quartz-SiO2
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

HHydrogen
H AnalcimeNa(AlSi2O6) · H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H MalachiteCu2(CO3)(OH)2
H AzuriteCu3(CO3)2(OH)2
H DatoliteCaB(SiO4)(OH)
H PrehniteCa2Al2Si3O10(OH)2
H GypsumCaSO4 · 2H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H TalcMg3Si4O10(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
C AzuriteCu3(CO3)2(OH)2
C CerussitePbCO3
C GraphiteC
OOxygen
O BaryteBaSO4
O AnalcimeNa(AlSi2O6) · H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O Quartz (var: Smoky Quartz)SiO2
O CalciteCaCO3
O QuartzSiO2
O Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O CupriteCu2O
O MalachiteCu2(CO3)(OH)2
O AzuriteCu3(CO3)2(OH)2
O DatoliteCaB(SiO4)(OH)
O AlmandineFe32+Al2(SiO4)3
O PrehniteCa2Al2Si3O10(OH)2
O AlbiteNa(AlSi3O8)
O GypsumCaSO4 · 2H2O
O CerussitePbCO3
O LaumontiteCaAl2Si4O12 · 4H2O
O KyaniteAl2(SiO4)O
O Quartz (var: Chalcedony)SiO2
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O TalcMg3Si4O10(OH)2
O WillemiteZn2SiO4
O MuscoviteKAl2(AlSi3O10)(OH)2
O HematiteFe2O3
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
FFluorine
F FluoriteCaF2
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na AlbiteNa(AlSi3O8)
Na SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
MgMagnesium
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg TalcMg3Si4O10(OH)2
Mg SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
AlAluminium
Al AnalcimeNa(AlSi2O6) · H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al AlmandineFe32+Al2(SiO4)3
Al PrehniteCa2Al2Si3O10(OH)2
Al AlbiteNa(AlSi3O8)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al KyaniteAl2(SiO4)O
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
SiSilicon
Si AnalcimeNa(AlSi2O6) · H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si Quartz (var: Smoky Quartz)SiO2
Si QuartzSiO2
Si Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si DatoliteCaB(SiO4)(OH)
Si AlmandineFe32+Al2(SiO4)3
Si PrehniteCa2Al2Si3O10(OH)2
Si AlbiteNa(AlSi3O8)
Si LaumontiteCaAl2Si4O12 · 4H2O
Si KyaniteAl2(SiO4)O
Si Quartz (var: Chalcedony)SiO2
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si TalcMg3Si4O10(OH)2
Si WillemiteZn2SiO4
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
SSulfur
S BaryteBaSO4
S ChalcociteCu2S
S BorniteCu5FeS4
S ChalcopyriteCuFeS2
S GypsumCaSO4 · 2H2O
S GalenaPbS
S PyriteFeS2
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca DatoliteCaB(SiO4)(OH)
Ca PrehniteCa2Al2Si3O10(OH)2
Ca GypsumCaSO4 · 2H2O
Ca FluoriteCaF2
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe BorniteCu5FeS4
Fe ChalcopyriteCuFeS2
Fe AlmandineFe32+Al2(SiO4)3
Fe PyriteFeS2
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Fe HematiteFe2O3
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe SaponiteCa0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu ChalcociteCu2S
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu CupriteCu2O
Cu MalachiteCu2(CO3)(OH)2
Cu AzuriteCu3(CO3)2(OH)2
Cu BorniteCu5FeS4
Cu ChalcopyriteCuFeS2
Cu CopperCu
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Zn WillemiteZn2SiO4
BaBarium
Ba BaryteBaSO4
PbLead
Pb GalenaPbS
Pb CerussitePbCO3

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 - Late Triassic
174.1 - 237 Ma



ID: 2791643
New Haven Arkose

Age: Mesozoic (174.1 - 237 Ma)

Stratigraphic Name: New Haven Arkose

Description: Red, pink, and gray coarse-grained, locally conglomeratic, poorly sorted and indurated arkose, interbedded with brick-red micaceous, locally shaly siltstone and fine-grained feldspathic clayey sandstone.

Comments: Part of Central Lowlands; Newark Terrane - Hartford and Pomperaug Mesozoic Basins; part of Newark Supergroup (Upper Triassic and Lower Jurassic). Original map source: Connecticut Geological and Natural History Survey, DEP, in cooperation with the U.S. Geological Survey, 2000, Bedrock Geology of Connecticut, shapefile, scale 1:50,000

Lithology: Major:{arkose}, Minor:{conglomerate,siltstone,sandstone}

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]

Triassic
201.3 - 251.902 Ma



ID: 3188891
Mesozoic volcanic and intrusive rocks

Age: Triassic (201.3 - 251.902 Ma)

Comments: Connecticut Valley Basin

Lithology: Mafic volcanic rocks; conglomerate,arkose,shale,arenite

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

External Links

http://www.mindat.org/photo-219460.html - Cheshire barite crystal illustrations from Dana's System of Mineralogy, 1st edition (1837).

Localities in this Region
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