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State Route 8 and State Route 118 interchange, Harwinton, Litchfield Co., Connecticut, USAi
Regional Level Types
State Route 8 and State Route 118 interchange- not defined -
Harwinton- not defined -
Litchfield Co.County
ConnecticutState
USACountry

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Latitude & Longitude (WGS84): 41° 45' 27'' North , 73° 6' 55'' West
Latitude & Longitude (decimal): 41.75750,-73.11528
GeoHash:G#: drkj81xp4
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Northwest Harwinton3,252 (2017)3.7km
Torrington34,906 (2017)4.8km
Litchfield1,215 (2017)6.2km
West Torrington36,000 (2017)7.2km
Thomaston1,910 (2017)9.9km


This locality mostly is a large exposure of the silvery Cambro-Ordovician Rowe Schist situated just south of the Route 8 northbound off-ramp to Route 118. There are smaller exposures of the Ordovician Ratlum Mountain Schist and Granofels on Route 118 opposite the commuter parking lot. Rock apparently blasted from the road cuts was used to grade the commuter parking lot and micro-minerals from modes 1 and 2 below were found in this rock. Besides the schist itself, there are 4 other modes of mineral occurrence:

1. Alpine cleft type voids with a suite of micro-minerals such as anatase, titanite, synchysite group, and quartz.

2. Microcrystalline zeolites and associated minerals in brittle fractures (prehnite, chabazite, stilbite).

3. A rare (for Connecticut) lithium phosphate-rich pegmatite featuring triphylite and associated secondary mineralization, most obviously vivianite, heterosite, and rockbridgeite.

4. Green to olive, massive Ca/Mg-silicate assemblage from alteration of an ultramafic rock body containing minerals like green (Cr-rich) and white fibrous tremolite, green (Cr-rich) grossular (assumed), diopside, actinolite, epidote, calcite, quartz, magnetite, etc. Not sure where this was exactly, but there are specimens in old collections, other than Januzzi's, with vague labels.

Examples of mineralizations 1 and 2 above were collected by Bob Wilken in 2002 from behind the commuter parking lot.

The pegmatite was described independently twice - by Januzzi and Seaman (1976) and Brunet (1978) and is detailed below:

Januzzi and Seaman (1976) (repeated in Januzzi (1994)) first mentions this triphylite-containing pegmatite locality he discovered in "a pegmatite exposure located just south of the road that leads to Harwinton [state Route 118] on the new Thomaston-Torrington Parkway [now state Route 8]. The author’s attention was drawn to this unique pegmatite after being shown a specimen incrusted by a blue mineral that checked out to be vivianite."

Minerals tentatively identified by Januzzi (1976) have not been added to the list below pending verification.

Brunet (1978) independently discovered it when a rock slide occurred at the cut, exposing more phosphate mineralization:

The Litchfield County location where heterosite-purpurite minerals were found is a pegmatite bordering the northbound lane of Route # 8 north of Thomaston and immediately before the Harwinton exit for Route # 118. The pegmatite intrudes the country rock at the south end of an extensive road-cut and is quite easily identifiable. In the fall of 1974 a rock slide occurred. In cutting away the overhanging rocks to guard against a recurrence, a portion of this pegmatite was blasted away. The heterosite-purpurite specimen was found in the rubble. Specimen size is 3 x 3 x 2 1/2 and contains a mass of purpurite, manganapatite and muscovite mica in a matrix of white feldspar with thin veins of clear quartz.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


33 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Habit: acicular
Colour: dark green
Description: Layers of bedded needles with coarse-grained chrome-tremolite in altered ultramafic rock.
Reference: Former Richard Schooner collection
Albite
Formula: Na(AlSi3O8)
Habit: anhedral
Colour: white
Description: Much of the albite matrix is stained black to dark green by secondary minerals from the alteration of the triphylite and can be confused with the latter. The twinning striae in the albite identifies it.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Anatase
Formula: TiO2
Habit: tabular
Colour: orange-red
Description: Tabular, clear, micro-crystals with adularia and quartz in thin alpine clefts.
Reference: P. Cristofono collection, 2014 (ex. R. Wilken, 2002)
Beraunite
Formula: Fe2+Fe3+5(PO4)4(OH)5 · 6H2O
Habit: stains and encrustations
Colour: dark green
Description: Very poorly crystallized in fracture fillings.
Reference: Observations of Januzzi material by Harold Moritz
Beryl
Formula: Be3Al2(Si6O18)
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
'Biotite'
Habit: anhedral tabular
Colour: black
Description: Small grains associated with garnet.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Calcite
Formula: CaCO3
Habit: massive
Colour: white
Description: Massive material in altered ultramafic rock.
Reference: Former Ed Force collection
Chabazite-Ca
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Habit: rhombohedral
Colour: white
Fluorescence: green under SW UV
Description: Rhombohedral crystals to 3 mm within fractures in schist. Green fluorescence very surprising.
Reference: Harold Moritz collection
Chalcopyrite
Formula: CuFeS2
Habit: anhedral
Description: Small grains scattered in the matrix.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
'Chlorite Group'
Habit: anhedral grains
Colour: dark green
Description: Alteration of biotite.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
'Columbite-Tantalite'
Description: "Incidentally, a magnificent columbite-tantalite crystal was also found in the pegmatite in 1974." Brunet (1978).
Reference: Brunet, William. (1978), Heterosite-Purpurite Locality in Connecticut. Rocks and Minerals: 53(2): 63.
Diopside
Formula: CaMgSi2O6
Habit: massive
Colour: Pale green-brown
Description: Part of altered ultramafic rock assemblage.
Reference: Former Ed Force collection
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Habit: subhedral elongated prisms to massive
Colour: Olive green
Description: Part of ultramafic rock assemblage.
Reference: Former Ed Force collection
Erythrite ?
Formula: Co3(AsO4)2 · 8H2O
Description: Mentioned by Januzzi (1976) but he does not describe any primary sulfide it may have formed from. Likely confused with an alteration product of the triphylite.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Ferrisicklerite ?
Formula: Li1-x(Fe3+xFe2+1-x)PO4
Description: Reference provides no detail, but likely to occur as an alteration of the triphylite.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.; Brunet, William. (1978), Heterosite-Purpurite Locality in Connecticut. Rocks and Minerals: 53(2): 63.
'Garnet Group'
Formula: X3Z2(SiO4)3
Habit: trapezohedral
Colour: pink to pale red
Description: Subhedral grains to 0.5 cm associated with biotite and zircon.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Goethite
Formula: α-Fe3+O(OH)
Habit: botryoidal crusts
Colour: dark brown to iridescent
Description: Crusts from alteration of the abundant sulfide minerals and perhaps the triphylite.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Grossular
Formula: Ca3Al2(SiO4)3
Habit: granular
Colour: emerald green
Description: Tiny but bright green grains in ultramafic rock assemblage, assumed to be Cr-rich grossular rather than the much rarer uvarovite.
Reference: Former Ed Force collection
Heterosite
Formula: (Fe3+,Mn3+)PO4
Habit: encrustations
Colour: dark brownish black
Description: Crusts from the weathering of triphylite.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.; Brunet, William. (1978), Heterosite-Purpurite Locality in Connecticut. Rocks and Minerals: 53(2): 63.
'K Feldspar'
Habit: prismatic, pseudo-rhombohedral
Colour: colorless
Description: Druses of clear, colorless micro-crystals with quartz in thin alpine clefts.
Reference: Robert Wilken collection
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Habit: prismatic, pseudo-rhombohedral
Colour: colorless
Description: Druses of clear, colorless micro-crystals with quartz in thin alpine clefts.
Reference: Robert Wilken collection
Magnetite
Formula: Fe2+Fe3+2O4
Habit: granular
Colour: black
Description: Tiny grains in altered ultramafic rock.
Reference: Former Ed Force collection
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Mitridatite
Formula: Ca2Fe3+3(PO4)3O2 · 3H2O
Habit: encrustations
Colour: yellow to red
Description: Thin crusts in fracture filling.
Reference: Observations of Januzzi material by Harold Moritz
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: anhedral tabular
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Opal
Formula: SiO2 · nH2O
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Opal var: Opal-AN
Formula: SiO2 · nH2O
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Pyrite
Formula: FeS2
Habit: anhedral grains and fracture filling, rare cubo-octahedral crystals
Colour: pale brassy
Description: Small grains in matrix and in fractures in matrix associated with altered triphylite. A few cubo-octahedral crystals to 2 mm.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Pyrrhotite
Formula: Fe7S8
Habit: anhedral grains
Colour: reddish bronze
Description: Small anhedral grains in matrix.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Quartz
Formula: SiO2
Habit: anhedral, druses of stubby prisms
Colour: smoky to colorlesss
Description: Massive except as micro-crystals in thin alpine clefts with adularia, anatase, synchysite-(Y). Minor constituent in altered ultramafic rock, but major component of the pegmatite.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.; Robert Wilken collection.
Rockbridgeite
Formula: Fe2+Fe3+4(PO4)3(OH)5
Habit: stains and encrustations
Colour: dark greenish-black to black
Description: Mostly as thin crusts and stains in matrix near triphylite pods and as a black rind around the pods, associated with vivianite. "found intimately associated with vivianite where it occurs in small greenish black masses, and in stalactitic form with a radial fibrous structure. The surface of the incrustations are composed of indistinct microcrystallized individuals of rockbridgeite" Januzzi and Seaman (1976)
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Sarcolite
Formula: Na4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
Habit: fibrous
Colour: white
Description: According to Januzzi and Seaman (1976), X-ray studies were conducted by Professor Horace Winchell at the mineralogical laboratories at Yale. Associated with triphylite and vivianite. Under the microscope appears as tiny masses of matted fibers and exceedingly fine crystals.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Sphalerite
Formula: ZnS
Habit: massive grains
Colour: dark brown
Description: Two tiny masses in albite.
Reference: Examination of Januzzi's specimens by Harold Moritz.
Synchysite-(Y)
Formula: CaY(CO3)2F
Habit: aggregates of hexagonal plates
Colour: white (due to alteration)
Description: Micro-crystals with adularia, anatase, quartz in thin alpine clefts.
Reference: Robert Wilken collection
Titanite
Formula: CaTi(SiO4)O
Reference: P. Cristofono collection, 2014 (ex. R. Wilken, 2002)
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Habit: massive to subhedral prismatic, acicular, fibrous
Colour: emerald green, white
Description: Coarse-grained green (Cr-rich) material with beds of white finer-grained, aciular to fibrous massive crystals in altered ultramafic rock.
Reference: Former Richard Schooner collection, Former Ed Force collection.
Triphylite
Formula: LiFe2+PO4
Habit: anhedral masses
Colour: greenish-gray
Description: Anhedral masses to a few cm, translucent fresh material is greenish-gray altering around the edges mostly to blue vivianite and black rockbridgeite (much nearby albite stained by the latter) and associated with pyrite in local fracture fillings.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Vivianite
Formula: Fe2+3(PO4)2 · 8H2O
Habit: encrustations, micro bladed crystals
Colour: blue to blue-green
Description: Mostly as blue crusts and stains in the matrix near triphylite, some micro flat bladed crystals lying flat in fractures. Concentrated in the outer edges of triphylite pods with rockbridgeite. Some of it could be other secondary minerals, but in general they are all poorly crystallized and thus do not lend themselves to visual ID.
Reference: Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Zircon
Formula: Zr(SiO4)
Habit: prismatic with pyramidal terminations
Colour: brown
Description: Crystals less than a cm associated with garnet and biotite.
Reference: Examination of Januzzi's specimens by Harold Moritz

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Goethite4.00.α-Fe3+O(OH)
Magnetite4.BB.05Fe2+Fe3+2O4
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Synchysite-(Y)5.BD.20cCaY(CO3)2F
Group 8 - Phosphates, Arsenates and Vanadates
Beraunite8.DC.27Fe2+Fe3+5(PO4)4(OH)5 · 6H2O
Erythrite ?8.CE.40Co3(AsO4)2 · 8H2O
Ferrisicklerite ?8.AB.10Li1-x(Fe3+xFe2+1-x)PO4
Fluorapatite8.BN.05Ca5(PO4)3F
Heterosite8.AB.10(Fe3+,Mn3+)PO4
Meta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
Mitridatite8.DH.30Ca2Fe3+3(PO4)3O2 · 3H2O
Rockbridgeite8.BC.10Fe2+Fe3+4(PO4)3(OH)5
Triphylite8.AB.10LiFe2+PO4
Vivianite8.CE.40Fe2+3(PO4)2 · 8H2O
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
Beryl9.CJ.05Be3Al2(Si6O18)
Chabazite-Ca9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Grossular9.AD.25Ca3Al2(SiO4)3
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Sarcolite9.EH.15Na4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
Titanite9.AG.15CaTi(SiO4)O
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Chlorite Group'-
'Columbite-Tantalite'-
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-
'var: Adularia'-KAlSi3O8

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Anatase4.4.4.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Synchysite-(Y)16a.1.3.2CaY(CO3)2F
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
ABXO4
Ferrisicklerite ?38.1.4.1Li1-x(Fe3+xFe2+1-x)PO4
Triphylite38.1.1.1LiFe2+PO4
AXO4
Heterosite38.4.1.1(Fe3+,Mn3+)PO4
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Meta-autunite40.2a.1.2Ca(UO2)2(PO4)2 · 6-8H2O
A3(XO4)2·xH2O
Erythrite ?40.3.6.3Co3(AsO4)2 · 8H2O
Vivianite40.3.6.1Fe2+3(PO4)2 · 8H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
(AB)5(XO4)3Zq
Rockbridgeite41.9.2.1Fe2+Fe3+4(PO4)3(OH)5
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)3Zq·xH2O
Mitridatite42.8.4.1Ca2Fe3+3(PO4)3O2 · 3H2O
(AB)3(XO4)2Zq·xH2O
Beraunite42.11.16.1Fe2+Fe3+5(PO4)4(OH)5 · 6H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Grossular51.4.3b.2Ca3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
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 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
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
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Al-Si Framework with other Be/Al/Si frameworks
Sarcolite76.3.2.1Na4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Chabazite-Ca77.1.2.1(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Biotite'-
'Chlorite Group'-
'Columbite-Tantalite'-
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-
'var: Adularia'-KAlSi3O8
Opal
var: Opal-AN
-SiO2 · nH2O

List of minerals for each chemical element

HHydrogen
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H Opal (var: Opal-AN)SiO2 · nH2O
H VivianiteFe32+(PO4)2 · 8H2O
H SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
H OpalSiO2 · nH2O
H Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
H RockbridgeiteFe2+Fe43+(PO4)3(OH)5
H Goethiteα-Fe3+O(OH)
H BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
H MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
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
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H ErythriteCo3(AsO4)2 · 8H2O
LiLithium
Li TriphyliteLiFe2+PO4
Li FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
BeBeryllium
Be BerylBe3Al2(Si6O18)
CCarbon
C Synchysite-(Y)CaY(CO3)2F
C SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
C CalciteCaCO3
OOxygen
O Synchysite-(Y)CaY(CO3)2F
O K Feldspar (var: Adularia)KAlSi3O8
O Garnet GroupX3Z2(SiO4)3
O BerylBe3Al2(Si6O18)
O ZirconZr(SiO4)
O FluorapatiteCa5(PO4)3F
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O Opal (var: Opal-AN)SiO2 · nH2O
O TriphyliteLiFe2+PO4
O VivianiteFe32+(PO4)2 · 8H2O
O SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
O AnataseTiO2
O TitaniteCaTi(SiO4)O
O OpalSiO2 · nH2O
O Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
O RockbridgeiteFe2+Fe43+(PO4)3(OH)5
O Heterosite(Fe3+,Mn3+)PO4
O Goethiteα-Fe3+O(OH)
O BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
O MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O AlbiteNa(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O DiopsideCaMgSi2O6
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O CalciteCaCO3
O MagnetiteFe2+Fe23+O4
O GrossularCa3Al2(SiO4)3
O ErythriteCo3(AsO4)2 · 8H2O
O FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
FFluorine
F Synchysite-(Y)CaY(CO3)2F
F FluorapatiteCa5(PO4)3F
NaSodium
Na SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
Na AlbiteNa(AlSi3O8)
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg DiopsideCaMgSi2O6
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
Al BerylBe3Al2(Si6O18)
Al SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
Al Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Al AlbiteNa(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al GrossularCa3Al2(SiO4)3
SiSilicon
Si K Feldspar (var: Adularia)KAlSi3O8
Si Garnet GroupX3Z2(SiO4)3
Si BerylBe3Al2(Si6O18)
Si ZirconZr(SiO4)
Si Opal (var: Opal-AN)SiO2 · nH2O
Si SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
Si TitaniteCaTi(SiO4)O
Si OpalSiO2 · nH2O
Si Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si AlbiteNa(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si DiopsideCaMgSi2O6
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si GrossularCa3Al2(SiO4)3
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
P TriphyliteLiFe2+PO4
P VivianiteFe32+(PO4)2 · 8H2O
P SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
P RockbridgeiteFe2+Fe43+(PO4)3(OH)5
P Heterosite(Fe3+,Mn3+)PO4
P BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
P MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
P FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
SSulfur
S ChalcopyriteCuFeS2
S PyrrhotiteFe7S8
S PyriteFeS2
S SphaleriteZnS
ClChlorine
Cl SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Synchysite-(Y)CaY(CO3)2F
Ca FluorapatiteCa5(PO4)3F
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
Ca SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)
Ca TitaniteCaTi(SiO4)O
Ca Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Ca MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca DiopsideCaMgSi2O6
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca CalciteCaCO3
Ca GrossularCa3Al2(SiO4)3
TiTitanium
Ti AnataseTiO2
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn Heterosite(Fe3+,Mn3+)PO4
FeIron
Fe TriphyliteLiFe2+PO4
Fe VivianiteFe32+(PO4)2 · 8H2O
Fe ChalcopyriteCuFeS2
Fe PyrrhotiteFe7S8
Fe PyriteFeS2
Fe RockbridgeiteFe2+Fe43+(PO4)3(OH)5
Fe Heterosite(Fe3+,Mn3+)PO4
Fe Goethiteα-Fe3+O(OH)
Fe BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
Fe MitridatiteCa2Fe33+(PO4)3O2 · 3H2O
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe MagnetiteFe2+Fe23+O4
Fe FerrisickleriteLi1-x(Fex3+Fe2+1-x)PO4
CoCobalt
Co ErythriteCo3(AsO4)2 · 8H2O
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ErythriteCo3(AsO4)2 · 8H2O
YYttrium
Y Synchysite-(Y)CaY(CO3)2F
ZrZirconium
Zr ZirconZr(SiO4)
UUranium
U Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O

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]

Early Ordovician - Cambrian
470 - 541 Ma



ID: 2960366
Rowe Schist

Age: Paleozoic (470 - 541 Ma)

Stratigraphic Name: Rowe Schist

Description: Light-gray to silvery, fine- to medium-grained, generally poorly layered schist, composed of quartz, muscovite, biotite, oligoclase, and generally garnet, staurolite, and kyanite or sillimanite. Layers of granofels common; also some layers of amphibolite, quartz-spessartine rock (coticule), and calc-silicate rock.

Comments: Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Hartland Belt 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,granofels}, Minor:{amphibolite,calc silicate rock}

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

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Brunet, William. (1978), Heterosite-Purpurite Locality in Connecticut. Rocks and Minerals: 53(2): 63.
Januzzi, Ronald E. (1994), Mineral Data Book - Western Connecticut and Environs. The Mineralogical Press, Danbury, Connecticut.


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