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Mountain Top Trucking quarry, Torrington (Wolcottville), Litchfield Co., Connecticut, USA

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Key
Lock Map
Latitude & Longitude (WGS84): 41° 49' 45'' North , 73° 6' 39'' West
Latitude & Longitude (decimal): 41.82917,-73.11083
GeoHash:G#: drkjbqf2d
Locality type:Quarry
Köppen climate type:Dfb : Warm-summer humid continental climate


A small aggregate quarry and concrete manufacturer. Quarry works a Late Proterozoic, layered, granitic orthogneiss with calc-silicate, biotite-rich and amphibolite lenses. The gneiss is part of the Laurentian basement terrane exposed in the southern end of the Berkshire Highlands.

Cross-cutting hydrothermal veins to approximately 7cm thick contain quartz crystals with chlorite inclusions. The crystals can sometimes be very clear and quite aesthetic.

Calc-silicate lenses contain small pods of massive pink or purple scapolite and large, well formed blades of actinolite.

Several samples of salmon-colored microcline-rich granite gneiss recovered bordering the quartz veins have numerous small grains of unknown minerals. These may be allanite and zircon var. cyrtolite. The granite gneiss appears to be moderately altered by hydrothermal activity. More detailed analysis is needed.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Jeremy Zolan Collection/Field Observation
Albite
Formula: Na(AlSi3O8)
Reference: Jeremy Zolan Collection/Field Observation
'Biotite'
Reference: Jeremy Zolan Collection/Field Observation
'Chlorite Group'
Reference: Jeremy Zolan Collection/Field Observation
Diopside
Formula: CaMgSi2O6
Description: Occurring as 2mm crystals in massive diopside.
Reference: Mike Polletta specimen
Fluorapatite
Formula: Ca5(PO4)3F
Description: Sharp blue crystals that were damaged upon discovery. Yellow fluorescence.
Reference: Mike polletta specimen
Microcline
Formula: K(AlSi3O8)
Reference: Jeremy Zolan Collection/Field Observation
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Jeremy Zolan Collection/Field Observation
Pyrite
Formula: FeS2
Reference: Mike Polletta specimen
Quartz
Formula: SiO2
Reference: Jeremy Zolan Collection/Field Observation
'Scapolite'
Reference: Jeremy Zolan Collection/Field Observation
Titanite
Formula: CaTi(SiO4)O
Reference: Mike polletta specimen
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Description: Sharp green blades. None terminated
Reference: Mike Polletta specimen

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Pyrite'2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
'Fluorapatite'8.BN.05Ca5(PO4)3F
Group 9 - Silicates
'Actinolite'9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Albite'9.FA.35Na(AlSi3O8)
'Diopside'9.DA.15CaMgSi2O6
'Microcline'9.FA.30K(AlSi3O8)
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
'Titanite'9.AG.15CaTi(SiO4)O
'Tremolite'9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Chlorite Group'-
'Scapolite'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
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 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Biotite'-
'Chlorite Group'-
'Scapolite'-

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O AlbiteNa(AlSi3O8)
O DiopsideCaMgSi2O6
O FluorapatiteCa5(PO4)3F
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O TitaniteCaTi(SiO4)O
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
FFluorine
F FluorapatiteCa5(PO4)3F
NaSodium
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg DiopsideCaMgSi2O6
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al AlbiteNa(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si AlbiteNa(AlSi3O8)
Si DiopsideCaMgSi2O6
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si TitaniteCaTi(SiO4)O
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
PPhosphorus
P FluorapatiteCa5(PO4)3F
SSulfur
S PyriteFeS2
KPotassium
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca DiopsideCaMgSi2O6
Ca FluorapatiteCa5(PO4)3F
Ca TitaniteCaTi(SiO4)O
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
TiTitanium
Ti TitaniteCaTi(SiO4)O
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
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

Cambrian
485.4 - 541 Ma



ID: 2732579
Hoosac Schist

Age: Cambrian (485.4 - 541 Ma)

Stratigraphic Name: Hoosac Schist

Description: Light- to medium-gray, rusty-weathering, fine- to medium-grained schist and poorly layered schistose gneiss, composed of quartz, biotite, plagioclase, muscovite, and generally garnet and sillimanite or kyanite.

Comments: Part of Western Uplands; Proto-North American (Continental) Terrance - Displaced Iapetus Terrane. In Vermont: Age of Hoosac is Late Proterozoic and Early Cambrian per CT004. 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:{schist,gneiss}

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]

Mesoproterozoic
1000 - 1600 Ma



ID: 3190409
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Paragneiss; paragneiss

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


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