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Hartland, Hartford Co., Connecticut, USAi
Regional Level Types
Hartland- not defined -
Hartford Co.County
ConnecticutState
USACountry

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Latitude & Longitude (WGS84): 41° 59' 46'' North , 72° 58' 46'' West
Latitude & Longitude (decimal): 41.99611,-72.97944
GeoHash:G#: drkngm1vp
Köppen climate type:Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Winsted7,712 (2017)10.7km
North Granby1,944 (2017)12.4km
Granville1,548 (2017)12.5km
New Hartford Center1,385 (2017)12.9km
Salmon Brook2,324 (2017)15.8km


A town incorporated in 1761.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

3 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

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Alphabetical List Tree Diagram

Detailed Mineral List:

'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: John Burnham
Kyanite
Formula: Al2(SiO4)O
Reference: John Burnham
Lechatelierite
Formula: SiO2
Reference: John Burnham
Stellerite ?
Formula: Ca4(Si28Al8)O72 · 28H2O
Habit: tabular prisms
Colour: orange
Description: Crystals to 1 cm coating brecciated gneiss. A sample https://www.mindat.org/photo-709453.html analyzed by SEM-EDS determined to be most likely stellerite because of total lack of Na and K.
Reference: Harold Moritz collection
'Stilbite subgroup'
Habit: tabular prisms
Colour: orange
Description: Crystals to 1 cm coating brecciated gneiss.
Reference: Harold Moritz collection

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Lechatelierite4.DA.30SiO2
Group 9 - Silicates
Kyanite9.AF.15Al2(SiO4)O
Stellerite ?9.GE.15Ca4(Si28Al8)O72 · 28H2O
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

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
Kyanite52.2.2c.1Al2(SiO4)O
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Stellerite ?77.1.4.4Ca4(Si28Al8)O72 · 28H2O
Unclassified Minerals, Mixtures, etc.
'Garnet Group'-X3Z2(SiO4)3
Lechatelierite-SiO2
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H StelleriteCa4(Si28Al8)O72 · 28H2O
OOxygen
O KyaniteAl2(SiO4)O
O Garnet GroupX3Z2(SiO4)3
O LechatelieriteSiO2
O StelleriteCa4(Si28Al8)O72 · 28H2O
AlAluminium
Al KyaniteAl2(SiO4)O
Al StelleriteCa4(Si28Al8)O72 · 28H2O
SiSilicon
Si KyaniteAl2(SiO4)O
Si Garnet GroupX3Z2(SiO4)3
Si LechatelieriteSiO2
Si StelleriteCa4(Si28Al8)O72 · 28H2O
CaCalcium
Ca StelleriteCa4(Si28Al8)O72 · 28H2O

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

Ordovician - Neoproterozoic
443.8 - 1000 Ma



ID: 3190671
Precambrian-Phanerozoic sedimentary rocks

Age: Neoproterozoic to Ordovician (443.8 - 1000 Ma)

Lithology: Mudstone-carbonate-sandstone-conglomerate

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]

Cambrian
485.4 - 541 Ma



ID: 2921527
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]

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

Localities in this Region
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