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Interstate 691 and State Route 10 Interchange, Cheshire, New Haven Co., Connecticut, USAi
Regional Level Types
Interstate 691 and State Route 10 Interchange- not defined -
Cheshire- not defined -
New Haven Co.County
ConnecticutState
USACountry

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Key
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Latitude & Longitude (WGS84): 41° 33' 25'' North , 72° 53' 26'' West
Latitude & Longitude (decimal): 41.55694,-72.89056
GeoHash:G#: drkhmm4ww
Köppen climate type:Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Cheshire Village5,786 (2017)6.1km
Cheshire29,443 (2017)6.5km
Meriden59,988 (2017)7.3km
Wolcott16,639 (2017)9.5km
Prospect9,476 (2017)9.5km


Roadcuts made in the early 1980s to create this interchange exposed the very northern end of the Jurassic West Rock Diabase sill/dike system and Upper Triassic New Haven Formation arkosic sandstone. Mineralization in the diabase was exposed on the I-691 eastbound off-ramp to Route 10 (calcite, datolite, barite, quartz) and in a pit near the NW corner of the interchange (mainly calcite).

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

Baryte
Formula: BaSO4
Reference: Harold Moritz collection
Calcite
Formula: CaCO3
Habit: Scalenohedral to rhombohedral
Colour: colorless, white, yellow, red-brown
Fluorescence: orange-red (best under MW UV), white to pale blue (outer zone on some dogtooth crystals under LW UV)
Description: At the off-ramp exposure the best crystals are translucent yellow dogtooth crystals to about 1.5 cm with good fluorescence. In the pit, the crystals are larger, to 2.5 cm and well formed but largely an ugly opaque red-brown from inclusions.
Reference: Harold Moritz collection
Chalcocite
Formula: Cu2S
Reference: David Busha collection
Chalcopyrite
Formula: CuFeS2
Reference: David Busha collection
Datolite
Formula: CaB(SiO4)(OH)
Habit: Typical roughly equant complexly formed.
Colour: Pale lime green.
Fluorescence: Spotty bright green zones under SW UV.
Description: Well-formed glassy crystals in voids, from a druse to about 1 cm.
Reference: Harold Moritz collection
Hematite
Formula: Fe2O3
Colour: red
Description: Mostly earthy material at the pit exposure.
Reference: Harold Moritz collection
Quartz
Formula: SiO2
Habit: Drusy
Colour: colorless
Description: Druses typically lining fracture voids.
Reference: Harold Moritz collection

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 9 - Silicates
Datolite9.AJ.20CaB(SiO4)(OH)

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 = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(OH)
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

HHydrogen
H DatoliteCaB(SiO4)(OH)
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
OOxygen
O CalciteCaCO3
O DatoliteCaB(SiO4)(OH)
O QuartzSiO2
O BaryteBaSO4
O HematiteFe2O3
SiSilicon
Si DatoliteCaB(SiO4)(OH)
Si QuartzSiO2
SSulfur
S BaryteBaSO4
S ChalcopyriteCuFeS2
S ChalcociteCu2S
CaCalcium
Ca CalciteCaCO3
Ca DatoliteCaB(SiO4)(OH)
FeIron
Fe ChalcopyriteCuFeS2
Fe HematiteFe2O3
CuCopper
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
BaBarium
Ba BaryteBaSO4

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

References

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Harold Moritz collection


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