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State Route 8 exit 37, Watertown, Litchfield Co., Connecticut, USAi
Regional Level Types
State Route 8 exit 37Road Cutting (Built Over)
WatertownTownship
Litchfield Co.County
ConnecticutState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 36' 3'' North , 73° 3' 59'' West
Latitude & Longitude (decimal):
Locality type:
Road Cutting (Built Over) - last checked 2018
Nearest Settlements:
PlacePopulationDistance
Oakville9,047 (2017)1.8km
Watertown3,574 (2017)4.3km
Waterbury108,802 (2017)4.9km
Wolcott16,639 (2017)6.6km
Plymouth12,284 (2017)8.0km


Roadcuts on state Route 8 in eastern Watertown at exit 37 formed during construction in the late 1960s. The cuts expose the Devonian-Silurian The Straits Schist.
Road cut on the southbound side of Route 8 at the Exit 37 on-ramp.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


15 valid minerals.

Detailed Mineral List:

Anatase
Formula: TiO2
Habit: bipyramidal
Colour: metallic blue to yellow and green
Description: "brilliant, metallic bluish, bipyramidal crystals and as bi-colored, glassy crystals exhibiting the same morphology (these crystals are blue to yellow, at times greenish in color), both deeply striated and occurring in alpine type seams"
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Description: Included in a list of minerals with no details, but common in the area.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Brookite
Formula: TiO2
Habit: tabular
Description: The Webers found several crystals in a vuggy feldspar on Route 8 in Watertown that are believed to be brookite. The crystals are exceedingly thin, brilliant, tabular, have zonal coloration, and striations on b. The largest was less than 1 mm long and no more than 1/2mm wide; unfortunately this crystal was lost while measurements were being made. Associated with anatase and rutile.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Calcite
Formula: CaCO3
Description: Associated with zeolites in fractured schist.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Chabazite-Ca
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Habit: rhombohedral
Colour: White, yellow to orange
Description: White and yellow crystals associated with pyrite, stilbite-Ca (or potentially stellerite), and calcite in brecciated schist.
Reference: Harold Moritz collection; Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.; Tschernich, Rudy W. (1992), Zeolites of the World. Geoscience Press, Phoenix: 114.
'Chlorite Group'
Habit: micaceous
Colour: dark green
Description: In Alpine-type clefts with anatase, brookite.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Epistilbite ?
Formula: CaAl2Si6O16 · 5H2O
Description: According to Januzzi (1976) "Epistilbite has been collected and confirmed from the Route 8 locality in Watertown." However, there is no mention of it in Tschernich (1992), which does mention other Connecticut localities for this mineral.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
'Heulandite subgroup'
Description: With other zeolites and calcite in fractured schist.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.; Tschernich, Rudy W. (1992), Zeolites of the World. Geoscience Press, Phoenix: 114.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Description: With other zeolites and calcite in fractured schist.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.; Tschernich, Rudy W. (1992), Zeolites of the World. Geoscience Press, Phoenix: 114.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Pickeringite
Formula: MgAl2(SO4)4 · 22H2O
Description: Alteration of pyrite.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Pyrite
Formula: FeS2
Description: in many shapes and forms
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Quartz
Formula: SiO2
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Rutile
Formula: TiO2
Description: In Alpine-type clefts in schist.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Sillimanite
Formula: Al2(SiO4)O
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Sphalerite
Formula: ZnS
Description: No details in the reference, but common in the area as polysynthetically twinned crystals often misidentified as wurtzite.
Reference: Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Stellerite ?
Formula: Ca4(Si28Al8)O72 · 28H2O
Habit: bowties and sheaf aggregates
Colour: orange
Description: This specimen https://www.mindat.org/photo-618484.html was analyzed by SEM-EDS and showed no more than a trace of Na or K, making it a good candidate for stellerite, although this method alone is not definitive. Stellerite cannot be visually distinguished from stilbite-Ca.
Reference: Harold Moritz collection
Stilbite-Ca
Formula: NaCa4[Al9Si27O72] · nH2O
Habit: subparallel aggregates of tabular crystals, bowties
Colour: yellow to orange-yellow
Description: The most common zeolite in the area, aggregates to 2 cm densely cover fractures in schist, associated with other zeolite, calcite, pyrite. Some or all may be stellerite based on an SEM-EDS analysis of this specimen www.mindat.org/photo-618484.html; although not definitive by itself, the two mineral species cannot be visually distinguished. However, the analysis does show that if it isn't stellerite, then it is stilbite-Ca.
Reference: Harold Moritz collection; Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.; Tschernich, Rudy W. (1992), Zeolites of the World. Geoscience Press, Phoenix: 114.; Collection of Mark A Gottlieb

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Brookite4.DD.10TiO2
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Pickeringite7.CB.85MgAl2(SO4)4 · 22H2O
Group 9 - Silicates
Chabazite-Ca9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Epistilbite ?9.GD.45CaAl2Si6O16 · 5H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Sillimanite9.AF.05Al2(SiO4)O
Stellerite ?9.GE.15Ca4(Si28Al8)O72 · 28H2O
Stilbite-Ca9.GE.10NaCa4[Al9Si27O72] · nH2O
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Chlorite Group'-
'Heulandite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Anatase4.4.4.1TiO2
Brookite4.4.5.1TiO2
Rutile4.4.1.1TiO2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AB2(XO4)4·H2O
Pickeringite29.7.3.1MgAl2(SO4)4 · 22H2O
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
Sillimanite52.2.2a.1Al2(SiO4)O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Chabazite-Ca77.1.2.1(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Epistilbite ?77.1.6.2CaAl2Si6O16 · 5H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Stellerite ?77.1.4.4Ca4(Si28Al8)O72 · 28H2O
Stilbite-Ca77.1.4.3NaCa4[Al9Si27O72] · nH2O
Unclassified Minerals, Mixtures, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Chlorite Group'-
'Heulandite subgroup'-

List of minerals for each chemical element

HHydrogen
H Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
H Stilbite-CaNaCa4[Al9Si27O72] · nH2O
H ApatiteCa5(PO4)3(Cl/F/OH)
H PickeringiteMgAl2(SO4)4 · 22H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H StelleriteCa4(Si28Al8)O72 · 28H2O
H EpistilbiteCaAl2Si6O16 · 5H2O
CCarbon
C CalciteCaCO3
OOxygen
O AnataseTiO2
O Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
O Stilbite-CaNaCa4[Al9Si27O72] · nH2O
O ApatiteCa5(PO4)3(Cl/F/OH)
O CalciteCaCO3
O PickeringiteMgAl2(SO4)4 · 22H2O
O QuartzSiO2
O RutileTiO2
O LaumontiteCaAl2Si4O12 · 4H2O
O BrookiteTiO2
O SillimaniteAl2(SiO4)O
O MuscoviteKAl2(AlSi3O10)(OH)2
O StelleriteCa4(Si28Al8)O72 · 28H2O
O EpistilbiteCaAl2Si6O16 · 5H2O
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Na Stilbite-CaNaCa4[Al9Si27O72] · nH2O
MgMagnesium
Mg PickeringiteMgAl2(SO4)4 · 22H2O
AlAluminium
Al Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Al Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Al PickeringiteMgAl2(SO4)4 · 22H2O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al SillimaniteAl2(SiO4)O
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al StelleriteCa4(Si28Al8)O72 · 28H2O
Al EpistilbiteCaAl2Si6O16 · 5H2O
SiSilicon
Si Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Si Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Si QuartzSiO2
Si LaumontiteCaAl2Si4O12 · 4H2O
Si SillimaniteAl2(SiO4)O
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si StelleriteCa4(Si28Al8)O72 · 28H2O
Si EpistilbiteCaAl2Si6O16 · 5H2O
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S PyriteFeS2
S PickeringiteMgAl2(SO4)4 · 22H2O
S SphaleriteZnS
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Ca Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca CalciteCaCO3
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca StelleriteCa4(Si28Al8)O72 · 28H2O
Ca EpistilbiteCaAl2Si6O16 · 5H2O
TiTitanium
Ti AnataseTiO2
Ti RutileTiO2
Ti BrookiteTiO2
FeIron
Fe PyriteFeS2
ZnZinc
Zn SphaleriteZnS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Tschernich, Rudy W. (1992), Zeolites of the World. Geoscience Press, Phoenix: 114.
Collection of Mark A Gottlieb


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