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State Route 9 Interchange 8 - Beaver Meadow Road, Haddam, Middlesex Co., Connecticut, USAi
Regional Level Types
State Route 9 Interchange 8 - Beaver Meadow RoadRoad Cutting (Inactive)
Haddam- not defined -
Middlesex Co.County
ConnecticutState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 27' 23'' North , 72° 31' 40'' West
Latitude & Longitude (decimal):
Locality type:
Road Cutting (Inactive) - last checked 2019
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Higganum1,698 (2017)5.1km
East Haddam9,042 (2017)5.6km
Moodus1,413 (2017)8.3km
Chester Center1,558 (2017)8.8km
Deep River Center2,484 (2017)11.1km


The state Route 9 divided, 4-lane expressway cuts diagonally through the metamorphic rocks of south-central Connecticut. In central Haddam, where Route 9 trends NW-SE, interchange 8 (formerly 7) connects it with Beaver Meadow Road, which crosses it at nearly a right angle. This interchange was opened in 1969, the reference coordinates for its center are given below.

Extensive and deep roadcuts along both sides of the divided highway, the 4 on and off-ramps, and nearby Hubbard Road have exposed rock units of the Middletown Formation, a metamorphic sequence consisting mostly of amphibolite, orthoamphibole gneiss, and biotite gneiss. Lundgren (1979) provides a detailed map and description of the rock units and their mineralogy at this interchange. Most of the minerals mentioned are rock-forming grains, but he notes one distinctive unit, “A gneiss in which gedrite occurs in well aligned prisms and in conspicuous rosettes of prisms. This unit also contains cordierite. It is well displayed in the cut on Hubbard Road at Beaver Meadow Road, the entrance to the northbound lane of Route 9, and in the exit from the southbound lane of Route 9 at Beaver Meadow Road”.

Bannerman, Quarrier, and Schooner (1968) gave the following descriptions of minerals at the roadcuts:

North side of Beaver Meadow Road. The eastern side of the eastern most road cut. This is actually the newly blasted intersection of Hubbard Road and Beaver Meadow Road. Several small pegmatite lenses have intruded the gneiss in this cut and they contain small pockets of clear blue cordierite. [Note: not a true granitic pegmatite, but a conformable, boudinaged, very coarse-grained albite-quartz unit - identical to the quarried rock at Tim's Hill.] While the blasting was under way last year some museum sized specimens of this mineral were recovered. Cordierite also occurs in lesser amounts in the surrounding gneiss.

North of Beaver Meadow Road. The western side of the cut of the north bound lane of Route 9. This cut is mostly in the Middletown Formation. Extremely coarse prisms of green-brown anthophyllite can be found on the surfaces between the layers of dark and light colored gneiss. This mineral is characteristic of the Middletown Formation in this area.

North of Beaver Meadow Road, on the east side of the cut for the south bound lane of Route 9. A pegmatite at the south end of this cut contains large well developed crystals of magnetite, some nearly an inch across.

South side of Beaver Meadow Road, on the west side of the south end of the southbound entrance ramp for Route 9. The small [true granitic, intrusive] pegmatite body that is perched on the side of the hill has produced a number of interesting minerals including albite, bismuthinite, monazite, molybdenite, tourmaline and beryl.


Apparently, the later, more technical work by Lundgren (1979) identified the anthophyllite above as gedrite. 2016 microprobe analysis identifies the "gedrite" as "anthophyllite" (amphibole group was redefined since the 1979), which is also widespread in the Middletown Formation.

Hiller (1971) also noted bavenite at the “small pegmatite body” described above. This bavenite was described by Henderson (1970), which was "found in or close to hexagonal cavities after beryl or cavities still partially filled by corroded beryl crystals. Only small amounts of unaltered beryl were found." He noted one "single superb specimen of bavenite was found consisting of crystals so large that they have the pale apple green color of prehnite. The crystals comprise five fans on albite with black tourmaline. Each crystal is about 4 mm square by 0.2 mm thick".

Yedlin (1967) mentions a chlorite schist from a now lost location between this pegmatite and Beaver Meadow Road that produced many sharp edged, doubly-terminated, nearly perfectly trigonal, black tourmaline crystals. One of these is drawn on the cover of Hiller (1971). These were common in old collections, but usually were just labeled as "Haddam" or incorrectly as coming from Tim's Hill.

An extensive blasted rock dump is present up to 0.5 km NNW of the interchange, in the area between Route 9 and Hubbard Road. Some of the minerals described have been found there as well, particularly large boulders of the gray, anthophyllite prism-bearing, granular quartz gneiss. This area was developed into residential lots circa 2007.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


28 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Habit: elongated prismatic
Colour: olive green
Description: Vein of crystals, originally enclosed in calcite, to about 1 cm, from a localized alteration of host amphibolite.
Reference: Harold Moritz collection
Albite
Formula: Na(AlSi3O8)
Habit: micro crystals
Colour: white
Description: clear micro crystals in vugs.
Reference: Yedlin, Neal. (1967). The Micromounter. Rocks and Minerals: 42(11): 840-842.
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Kevin Czaja Collection
Almandine
Formula: Fe2+3Al2(SiO4)3
Habit: dodecahedral
Colour: maroon
Description: In white feldspar.
Reference: Yedlin, Neal. (1967). The Micromounter. Rocks and Minerals: 42(11): 840-842.; Kevin Czaja Collection
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Habit: prismatic
Colour: dark green
Description: As pure layers cm thick and as isolated to radial sprays of crystals to several cm long in a granular quartz-albite matrix.
Reference: Lundgren, Lawrence, Jr. (1979): THE BEDROCK GEOLOGY OF THE HADDAM QUADRANGLE. State Geological and Natural History Survey of Connecticut. Quadrangle Report No. 37, pages 9-13.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Habit: hexagonal
Colour: yellow to yellow-green
Description: In the tourmaline-bearing schist, apatite occurs in clear yellow to yellow green hexagonal x1s, mostly micro. However, one greenish xl about 1 3/8" x 3/4" was found (Yedlin, 1967).
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.; Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.209.
Bavenite
Formula: Ca4Be2Al2Si9O26(OH)2
Habit: blades, needles, platey, massive, in hemispherical and 2-D radiating aggregates
Colour: white to pale green
Description: probably the best material for the species in Connecticut.
Reference: Henderson, William, A., Jr. (1970): Bavenite From Connecticut. Mineralogical Record, volume 1, no. 2.; Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 403.; Yedlin, Neal. (1967). The Micromounter. Rocks and Minerals: 42(11): 840-842.
Bertrandite
Formula: Be4(Si2O7)(OH)2
Habit: Hemispherical aggregates and 2-dimensional sprays of radiating, acicular crystals
Colour: white
Reference: Yedlin, Neal. (1967). The Micromounter. Rocks and Minerals: 42(11): 840-842.; Mineralogical Record (1975) 6:114-123; Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403
Beryl
Formula: Be3Al2(Si6O18)
Habit: elongated hexagonal prisms
Description: Crystals largely altered to bavenite at the small pegmatite.
Reference: Henderson, William, A., Jr. (1970): BAVENITE FROM CONNECTICUT. Mineralogical Record, volume 1, no. 2.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Habit: Anhedral folia
Colour: black
Reference: Harold Moritz collection
Bismuthinite
Formula: Bi2S3
Habit: Acicular
Colour: gray metallic
Reference: Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409
'Chlorite Group'
Habit: Anhedral folia, veriform aggregates
Colour: dark green
Description: Associated with the cordierite, albite, quartz veins
Reference: Harold Moritz collection; Yedlin, Neal. (1967). The Micromounter. Rocks and Minerals: 42(11): 840-842.
'Columbite-(Fe)-Columbite-(Mn) Series'
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Habit: Anhedral to blocky
Colour: gray-green to violet
Reference: Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409
Dravite
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409
Fluorite
Formula: CaF2
Habit: octahedral
Colour: purple tints
Description: Micro crystals associated with the bavenite as almost clear octahedrons showing purplish areas.
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.
Gedrite ?
Formula: ☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Habit: acicular prisms in 2-D rosettes and sprays
Description: Identified by Lundgren (1979), but not confirmed by 2016 ion microprobe analysis
Reference: Lundgren, Lawrence, Jr. (1979): THE BEDROCK GEOLOGY OF THE HADDAM QUADRANGLE. State Geological and Natural History Survey of Connecticut. Quadrangle Report No. 37: 9-13.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Habit: elongated prisms
Colour: white
Description: Associated with prehnite. "...fine little obliquely-terminated white prisms on reniform prehnite from amphibole gneiss. Ben Hayes collected some fine specimens." Schooner circa 1990.
Reference: Schooner, Richard (circa 1990) Untitled manuscript on central Connecticut mineralogy.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: [www.johnbetts-fineminerals.com]
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.
Molybdenite
Formula: MoS2
Reference: Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409
Monazite-(Ce)
Formula: Ce(PO4)
Reference: Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: anhedral folia
Colour: silvery
Description: Grains in the pegmatite
Reference: Harold Moritz collection
Powellite
Formula: Ca(MoO4)
Habit: powdery
Colour: white, yellowish or greenish
Description: powdery white, yellowish or greenish material lining vugs, or as excellent plates alternating with plates of molybdenite.
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.; Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Habit: botryoidal
Colour: pale yellow-green
Description: "Ben Hayes gave the author a few attractive specimens of reniform yellow prehnite, on joint surfaces of amphibolite..." Schooner circa 1990.
Reference: Schooner, Richard (circa 1990) Untitled manuscript on central Connecticut mineralogy.
Pyrite
Formula: FeS2
Description: Micro crystals of various unspecified forms.
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.
Pyrrhotite
Formula: Fe7S8
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.
Quartz
Formula: SiO2
Habit: anhedral
Colour: clear to white
Description: Large masses in the cordierite, albite, quartz veins
Reference: Harold Moritz collection
Quartz var: Smoky Quartz
Formula: SiO2
Habit: anhedral
Colour: dark gray
Description: Prevalent in the pegmatite.
Reference: Harold Moritz collection
Rutile
Formula: TiO2
Habit: grains and rounded micro crystals
Colour: red to black
Description: Transparent red to black-appearing grains and rounded xls in and on feldspar in the schist.
Reference: Yedlin, Neal. (1967), The Micromounter. Rocks and Minerals: 42(11): 840-842.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Habit: trigonal prisms with rhombohedral terminations
Colour: black to brown-black
Description: stout trigonal prisms, some with distinctly straight triangular cross-sections, rhombohedral terminations.
Reference: Kevin Czaja Collection; Yedlin, Neal. (1967). The Micromounter. Rocks and Minerals: 42(11): 840-842.
'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
Reference: Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409
Uraninite
Formula: UO2
Habit: octahedral
Colour: black
Description: Associated with magnetite in pegmatite.
Reference: Anthony Albini collection

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bismuthinite2.DB.05Bi2S3
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Uraninite4.DL.05UO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Powellite7.GA.05Ca(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Meta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
Metatorbernite8.EB.10Cu(UO2)2(PO4)2 · 8H2O
Monazite-(Ce)8.AD.50Ce(PO4)
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Almandine9.AD.25Fe2+3Al2(SiO4)3
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Babingtonite9.DK.05Ca2(Fe,Mn)FeSi5O14(OH)
Bavenite9.DF.25Ca4Be2Al2Si9O26(OH)2
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Dravite9.CK.05Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Gedrite ?9.DD.05☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
AmBnXp, with (m+n):p = 2:3
Bismuthinite2.11.2.3Bi2S3
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Rutile4.4.1.1TiO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(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
Metatorbernite40.2a.13.2Cu(UO2)2(PO4)2 · 8H2O
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Powellite48.1.2.2Ca(MoO4)
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
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Six-Membered Rings with borate groups
Dravite61.3.1.9Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
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=5
Babingtonite65.4.1.2Ca2(Fe,Mn)FeSi5O14(OH)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Gedrite ?66.1.2.5☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
Group 70 - INOSILICATES Column or Tube Structures
Column or Tube Structures with chains linked by Be
Bavenite70.5.3.1Ca4Be2Al2Si9O26(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 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
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
Quartz
var: Smoky Quartz
-SiO2
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6

List of minerals for each chemical element

HHydrogen
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H BaveniteCa4Be2Al2Si9O26(OH)2
H BertranditeBe4(Si2O7)(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
H ApatiteCa5(PO4)3(Cl/F/OH)
H BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
H MetatorberniteCu(UO2)2(PO4)2 · 8H2O
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H PrehniteCa2Al2Si3O10(OH)2
H LaumontiteCaAl2Si4O12 · 4H2O
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
BeBeryllium
Be BaveniteCa4Be2Al2Si9O26(OH)2
Be BertranditeBe4(Si2O7)(OH)2
Be BerylBe3Al2(Si6O18)
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
B DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O AlbiteNa(AlSi3O8)
O BaveniteCa4Be2Al2Si9O26(OH)2
O BertranditeBe4(Si2O7)(OH)2
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O MagnetiteFe2+Fe23+O4
O DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
O Monazite-(Ce)Ce(PO4)
O PowelliteCa(MoO4)
O Tantalite(Mn,Fe)(Ta,Nb)2O6
O ApatiteCa5(PO4)3(Cl/F/OH)
O BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
O AlmandineFe32+Al2(SiO4)3
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O UraniniteUO2
O RutileTiO2
O MetatorberniteCu(UO2)2(PO4)2 · 8H2O
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O PrehniteCa2Al2Si3O10(OH)2
O BerylBe3Al2(Si6O18)
O LaumontiteCaAl2Si4O12 · 4H2O
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O Quartz (var: Smoky Quartz)SiO2
O Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
F FluoriteCaF2
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
NaSodium
Na AlbiteNa(AlSi3O8)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
AlAluminium
Al AlbiteNa(AlSi3O8)
Al BaveniteCa4Be2Al2Si9O26(OH)2
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Al AlmandineFe32+Al2(SiO4)3
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Al PrehniteCa2Al2Si3O10(OH)2
Al BerylBe3Al2(Si6O18)
Al LaumontiteCaAl2Si4O12 · 4H2O
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
SiSilicon
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si AlbiteNa(AlSi3O8)
Si BaveniteCa4Be2Al2Si9O26(OH)2
Si BertranditeBe4(Si2O7)(OH)2
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Si BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Si AlmandineFe32+Al2(SiO4)3
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si PrehniteCa2Al2Si3O10(OH)2
Si BerylBe3Al2(Si6O18)
Si LaumontiteCaAl2Si4O12 · 4H2O
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si Quartz (var: Smoky Quartz)SiO2
Si Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
PPhosphorus
P Monazite-(Ce)Ce(PO4)
P ApatiteCa5(PO4)3(Cl/F/OH)
P MetatorberniteCu(UO2)2(PO4)2 · 8H2O
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
SSulfur
S BismuthiniteBi2S3
S MolybdeniteMoS2
S PyriteFeS2
S PyrrhotiteFe7S8
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca BaveniteCa4Be2Al2Si9O26(OH)2
Ca PowelliteCa(MoO4)
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Ca FluoriteCaF2
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca PrehniteCa2Al2Si3O10(OH)2
Ca LaumontiteCaAl2Si4O12 · 4H2O
TiTitanium
Ti RutileTiO2
MnManganese
Mn Tantalite(Mn,Fe)(Ta,Nb)2O6
Mn BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
FeIron
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe MagnetiteFe2+Fe23+O4
Fe Tantalite(Mn,Fe)(Ta,Nb)2O6
Fe BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Fe AlmandineFe32+Al2(SiO4)3
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
CuCopper
Cu MetatorberniteCu(UO2)2(PO4)2 · 8H2O
NbNiobium
Nb Tantalite(Mn,Fe)(Ta,Nb)2O6
MoMolybdenum
Mo MolybdeniteMoS2
Mo PowelliteCa(MoO4)
CeCerium
Ce Monazite-(Ce)Ce(PO4)
TaTantalum
Ta Tantalite(Mn,Fe)(Ta,Nb)2O6
BiBismuth
Bi BismuthiniteBi2S3
UUranium
U UraniniteUO2
U MetatorberniteCu(UO2)2(PO4)2 · 8H2O
U Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Yedlin, Neal. (1967) The Micromounter. Rocks and Minerals: 42(11): 840-842.
Bannerman, Harold M., Sidney S. Quarrier, and Richard Schooner. (1968) Mineral Deposits of the Central Connecticut Pegmatite District in Guidebook for Fieldtrips in Connecticut. State Geological and Natural History Survey of Connecticut. Guidebook No. 2, Trip F-6.
Henderson, William, A., Jr. (1970) Bavenite From Connecticut. Mineralogical Record: 1(2).
Hiller, John Jr. (1971) Connecticut Mines and Minerals. Privately published.
Lundgren, Lawrence, Jr. (1979) The Bedrock Geology of the Haddam Quadrangle. State Geological and Natural History Survey of Connecticut. Quadrangle Report No. 37: 9-13.
Schooner, Richard. (circa 1990) Unpublished manuscript on central Connecticut mineralogy.
Weber, Marcelle H. and Earle C. Sullivan. (1995) Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.

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