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Farmington Trap Rock Quarry, Farmington, Hartford Co., Connecticut, USAi
Regional Level Types
Farmington Trap Rock QuarryQuarry
Farmington- not defined -
Hartford Co.County
ConnecticutState
USACountry

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Latitude & Longitude (WGS84): 41° 43' 40'' North , 72° 48' 11'' West
Latitude & Longitude (decimal): 41.72778,-72.80333
GeoHash:G#: drkjrk61z
Locality type:Quarry
Köppen climate type:Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Farmington25,000 (2017)2.5km
West Hartford63,268 (2017)6.4km
Newington30,562 (2017)7.4km
Plainville17,328 (2017)7.5km
New Britain72,808 (2017)7.7km


An old quarry in the early Jurassic Holyoke Basalt excavated from an undetermined time until the early 1930s. From the 1930s until circa 1970, the quarry pit was filled with municipal solid waste. This is likely the locality for many old specimens just attributed to "Farmington" as it predates the modern state Route 4 road cut nearby and the Tilcon quarry on US Route 6.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


8 valid minerals.

Detailed Mineral List:

Aragonite
Formula: CaCO3
Reference: Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Baryte
Formula: BaSO4
Reference: Tschernich, R. (1992): Zeolites of the World. Geoscience Press, Phoenix, p. 114.
Calcite
Formula: CaCO3
Habit: rhombohedral
Colour: yellow
Description: small, yellow, transparent xls of calcite which were nearly cubic in form (Bartsch, 1940).
Reference: Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 8, p. 274.
'Chabazite'
Reference: Tschernich, R. (1992): Zeolites of the World. Geoscience Press, Phoenix, p. 114.
Chalcopyrite
Formula: CuFeS2
Reference: Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
'Chlorite Group'
Reference: Tschernich, R. (1992): Zeolites of the World. Geoscience Press, Phoenix, p. 114.
Datolite
Formula: CaB(SiO4)(OH)
Reference: Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Hematite
Formula: Fe2O3
Habit: Coatings
Colour: Red-brown
Description: Red-brown coatings on fractures.
Reference: Eric Quinter collection
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Habit: botryoidal aggregates
Colour: pale green
Reference: Tschernich, R. (1992): Zeolites of the World. Geoscience Press, Phoenix, p. 114.; Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals, vol. 15, no. 8, p. 274; Zodac, Peter. (1938), Prehnite. Rocks & Minerals: 13(5): 131.
Quartz
Formula: SiO2
Reference: Tschernich, R. (1992): Zeolites of the World. Geoscience Press, Phoenix, p. 114.
Quartz var: Amethyst
Formula: SiO2
Reference: Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Quartz var: Chalcedony
Formula: SiO2
Reference: Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
'Stilbite subgroup'
Reference: Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 9 - Silicates
Datolite9.AJ.20CaB(SiO4)(OH)
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Unclassified Minerals, Rocks, etc.
'Chabazite'-
'Chlorite Group'-
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
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 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 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Aragonite-CaCO3
'Chabazite'-
'Chlorite Group'-
Quartz
var: Amethyst
-SiO2
var: Chalcedony-SiO2
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H PrehniteCa2Al2Si3O10(OH)2
H DatoliteCaB(SiO4)(OH)
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
C AragoniteCaCO3
OOxygen
O PrehniteCa2Al2Si3O10(OH)2
O CalciteCaCO3
O AragoniteCaCO3
O DatoliteCaB(SiO4)(OH)
O Quartz (var: Amethyst)SiO2
O Quartz (var: Chalcedony)SiO2
O QuartzSiO2
O BaryteBaSO4
O HematiteFe2O3
AlAluminium
Al PrehniteCa2Al2Si3O10(OH)2
SiSilicon
Si PrehniteCa2Al2Si3O10(OH)2
Si DatoliteCaB(SiO4)(OH)
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Chalcedony)SiO2
Si QuartzSiO2
SSulfur
S ChalcopyriteCuFeS2
S BaryteBaSO4
CaCalcium
Ca PrehniteCa2Al2Si3O10(OH)2
Ca CalciteCaCO3
Ca AragoniteCaCO3
Ca DatoliteCaB(SiO4)(OH)
FeIron
Fe ChalcopyriteCuFeS2
Fe HematiteFe2O3
CuCopper
Cu ChalcopyriteCuFeS2
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
174.1 - 201.3 Ma



ID: 2921544
Holyoke Basalt

Age: Early Jurassic (174.1 - 201.3 Ma)

Stratigraphic Name: Holyoke Basalt

Description: Greenish-gray to black (weathers bright orange to brown), fine- to coarse-grained, grading from basalt near contacts to gabbro in the interior, composed of pyroxene and plagioclase with accessory opaques and locally olivine or devitrified glass.

Comments: Part of Central Lowlands; Newark Terrane - Hartford and Pomperaug Mesozoic Basins. Part of Newark Supergroup (Upper Triassic and Lower Jurassic). Part of Meriden Formation of Krynine (1950) (Lower Jurassic); CT005. 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:{basalt,gabbro}

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

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Schairer, John F. (1931): Minerals of Connecticut. State Geological and Natural History Survey of Connecticut Bulletin 51.
Zodac, Peter. (1938), Prehnite. Rocks & Minerals: 13(5): 131.
Bartsch, Rudolf C. B. (1940): New England Notes. Rocks & Minerals: 15(8): 274.
Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Januzzi, Ronald E. (1976): The Mineral Localities of Connecticut and Southeastern New York State. Mineralogical Press, Danbury.
Tschernich, R. (1992): Zeolites of the World. Geoscience Press, Phoenix, p. 114.


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