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Huckleberry Hill, Avon, Hartford Co., Connecticut, USAi
Regional Level Types
Huckleberry HillHill
Avon- not defined -
Hartford Co.County
ConnecticutState
USACountry

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Latitude & Longitude (WGS84): 41° 48' 39'' North , 72° 54' 12'' West
Latitude & Longitude (decimal): 41.81111,-72.90361
GeoHash:G#: drkjv53pq
Locality type:Hill
Köppen climate type:Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Collinsville3,746 (2017)1.4km
Canton Valley1,580 (2017)2.8km
Weatogue2,776 (2017)7.2km
West Simsbury2,447 (2017)7.9km
New Hartford Center1,385 (2017)9.7km


Residential housing development from about 2000 to 2016 on this hill exposed quartz-mineralized brittle faults, probably related to the Hartford Basin just to the east, cross-cutting the Ordovician hornblende gneiss/amphibolite member of the Collinsville Formation and the Ordovician Bristol Gneiss. Finds were at least along Windsor Court, Tyler Court and Kingswood Road. Some metamorphic mineral crystals were also found in those host rocks. Coordinates are for the summit of the hill.

Turns out Shepard (1837) described loose surface boulders of quartz here (the hill is bisected by the Canton-Avon town line and quartz is likely found on both sides):
A cellular drusy quartz found on Whortleberry-hill [aka Huckleberry Hill] in the south part, of Canton, was used during the last war for millstones. Several acres near the top of this hill are strewed over with large masses of this rock.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


11 valid minerals.

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Habit: trapezohedral
Colour: maroon
Description: In pegmatites
Reference: John Burnham collection
Diopside
Formula: CaMgSi2O6
Colour: lime green
Description: Associated with grossular in quartz.
Reference: John Burnham
Galena
Formula: PbS
Reference: John Burnham Collection
Grossular
Formula: Ca3Al2(SiO4)3
Habit: dodecahedral
Colour: orange-brown
Description: With diopside, quartz.
Reference: John Burnham collection
'Limonite'
Formula: (Fe,O,OH,H2O)
Habit: cubic
Colour: chocolate brown
Description: Goethite pseudomorphs after pyrite.
Reference: John Burnham
Malachite
Formula: Cu2(CO3)(OH)2
Reference: John Burnham Collection
'Manganese Oxides'
Reference: John Burnham
'Manganese Oxides var: Manganese Dendrites'
Reference: John Burnham
Microcline
Formula: K(AlSi3O8)
Reference: John Burnham
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: John Burnham
Pyrite
Formula: FeS2
Habit: cubic
Description: Found in the quartz veins, altered to goethite.
Reference: John Burnham
Pyromorphite
Formula: Pb5(PO4)3Cl
Reference: John Burnham Collection
Quartz
Formula: SiO2
Habit: Stubby prismatic "corn cob" habit, or parallel-growth typically with only terminations showing
Colour: Milky, smoky to amethystine.
Description: Crystals to 15 cm
Reference: Rowan M. Lytle; Harold Moritz collection
Quartz var: Amethyst
Formula: SiO2
Habit: Stubby prismatic
Reference: John Burnham
Quartz var: Chalcedony
Formula: SiO2
Reference: John Burnham
Quartz var: Jasper
Reference: John Burnham Collection
Quartz var: Smoky Quartz
Formula: SiO2
Habit: Stubby prismatic, parallel-growth typically with only terminations showing
Colour: smoky
Reference: John Burnham
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: John Burnham; ;

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Jasper4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Malachite5.BA.10Cu2(CO3)(OH)2
Group 8 - Phosphates, Arsenates and Vanadates
Pyromorphite8.BN.05Pb5(PO4)3Cl
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3
Diopside9.DA.15CaMgSi2O6
Grossular9.AD.25Ca3Al2(SiO4)3
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Pyromorphite41.8.4.1Pb5(PO4)3Cl
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Grossular51.4.3b.2Ca3Al2(SiO4)3
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
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
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
Quartz
var: Amethyst
-SiO2
var: Chalcedony-SiO2
var: Jasper-SiO2
var: Smoky Quartz-SiO2

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
H Limonite(Fe,O,OH,H2O)
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H MalachiteCu2(CO3)(OH)2
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C MalachiteCu2(CO3)(OH)2
OOxygen
O QuartzSiO2
O Quartz (var: Smoky Quartz)SiO2
O Quartz (var: Chalcedony)SiO2
O AlmandineFe32+Al2(SiO4)3
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Quartz (var: Amethyst)SiO2
O Limonite(Fe,O,OH,H2O)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O DiopsideCaMgSi2O6
O GrossularCa3Al2(SiO4)3
O PyromorphitePb5(PO4)3Cl
O MalachiteCu2(CO3)(OH)2
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg DiopsideCaMgSi2O6
AlAluminium
Al AlmandineFe32+Al2(SiO4)3
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al GrossularCa3Al2(SiO4)3
SiSilicon
Si QuartzSiO2
Si Quartz (var: Smoky Quartz)SiO2
Si Quartz (var: Chalcedony)SiO2
Si AlmandineFe32+Al2(SiO4)3
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Quartz (var: Amethyst)SiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si DiopsideCaMgSi2O6
Si GrossularCa3Al2(SiO4)3
PPhosphorus
P PyromorphitePb5(PO4)3Cl
SSulfur
S PyriteFeS2
S GalenaPbS
ClChlorine
Cl PyromorphitePb5(PO4)3Cl
KPotassium
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca DiopsideCaMgSi2O6
Ca GrossularCa3Al2(SiO4)3
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CuCopper
Cu MalachiteCu2(CO3)(OH)2
PbLead
Pb GalenaPbS
Pb PyromorphitePb5(PO4)3Cl

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

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]

Middle Ordovician
458.4 - 470 Ma



ID: 2832746
Bristol Gneiss

Age: Middle Ordovician (458.4 - 470 Ma)

Stratigraphic Name: Bristol Gneiss

Description: Light, medium-grained, massive to well-layered gneiss, composed of plagioclase, quartz, and biotite, also muscovite and garnet in many layers, interlayered in places with dark amphibolite. Bristol Member of Collinsville Formation (Stanley, 1964) is here raised in rank and revised as Bristol Gneiss in the report area. Garnet- and epidote-bearing amphibolite and hornblende gneiss assigned by Stanley to the upper part of his Bristol Member is here assigned to base of the overlying Collinsville Formation and composes the unnamed hornblende gneiss member. As defined here, the Bristol Gneiss consists of plagioclase-quartz gneiss characterized by foliae of muscovite or biotite, or locally chlorite, which in places give the unit a striking pinstriping; contains scattered small garnets and large pods of amphibolite. Average thickness may be about 2,000 ft; thickness varies due to local intense folding. Probably correlates with the Moretown Formation of central MA, in which case it would constitute a fourth member of Stanley's Taine Mountain Formation. Formational status assigned in this report based on its unique textural and lithological character. Inferred age is Middle Ordovician (Simpson, 1990).

Comments: Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Gneiss Dome Belt. Secondary unit description per CT008. 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:{gneiss}, Minor:{amphibolite}

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]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Shepard, Charles U. (1837), A Report on the Geological Survey of Connecticut. Hamlen, New Haven.


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