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Linkpot cut, Airline Railroad, East Hampton (Chatham), Middlesex Co., Connecticut, USAi
Regional Level Types
Linkpot cut- not defined -
Airline Railroad- not defined -
East Hampton (Chatham)- not defined -
Middlesex Co.County
ConnecticutState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84): 41° 34' 34'' North , 72° 28' 57'' West
Latitude & Longitude (decimal): 41.57612,-72.48253
GeoHash:G#: drkkw8ey6
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
East Hampton2,691 (2017)1.7km
Lake Pocotopaug3,436 (2017)3.4km
Terramuggus1,025 (2017)6.6km
Moodus1,413 (2017)8.6km
Higganum1,698 (2017)10.8km


A small, unusual pegmatite cropping out at what Schooner (1958) (the reported discoverer in 1938 - see Zodac (1940)), called the "Second Long Railroad Cut East of East Hampton" and what Weber and Sullivan (1995) called the "Linkpot railroad cut". It is along the former Airline Railroad trail and is reached by heading east from the parking area by the Cranberry Pond at the north end of Smith Street. Schooner, in Zodac (1940) says that "The chlorophane occurs as a small vein, 1 inch wide, in a 2-foot pegmatite dike, 8 ft. off the ground and about 50 ft. from the beginning [west end] of the cut." In his unpublished 1980s manuscript, Schooner provided additional details:

Hyalophane, colorless to green, is very common in material from the railroad cut east of East Hampton. It had been noted, and called orthoclase, by S. Ward Loper of Wesleyan University, in the late 19th century. Cavities of well formed but somewhat dull crystals occur in the hydrothermal vein system, or in masses with fluorite, sulfides, rare earth minerals, scapolite, dravite, and a great variety of other species. Again, the characterization is on X-ray and spectrographic grounds...

The mineralized railroad cut, east of Cranberry Pond in East Hampton, has produced many specimens; but the fluorite is thoroughly invested with unstable iron sulfides, and tends to fall apart. It may be granular or in small cleavages. The color is predominantly pink, but it ranges to white and purple. It was originally found, by the author, prior to 1940, in the upper part of the vein system, with rare earth minerals or in pockets of crystallized hyalophane feldspar. The lower part of the vein, excavated in sewer construction, presented fluorite in close association with scapolite, wollastonite, pink epidote, pyrite, galena, calcite, and other species. The railroad cut fluorite is highly fluorescent, phosphorescent, and thermoluminescent, glowing a rich green.


The trail is now State of Connecticut land and collecting is not allowed without a permit from the Dept. of Energy & Environmental Protection.

The association of allanite-(Ce), bastnaesite-(Ce), fluorite, chalcopyrite, pyrite, plagioclase, microcline (reportedly hyalophane) and quartz makes it unusual for the Middletown pegmatite district.

Installation of an underground sewer line along the path unearthed additional minerals such as scheelite. Rubble from this project was dumped at the edge of the swamp a little bit NW of the north end of the cut and Schooner reports additional finds here.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


27 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Colour: white
Description: A constituent of the pegmatite.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Description: The references provide no details, but a major component of area metamorphic rocks.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
'Albite-Anorthite Series'
Habit: anhedral
Colour: white to greenish
Description: associated with allanite, fluorite, bastnaesite, pyrite, chalcopyrite in the pegmatite, species undetermined. Commonly stained brown from the decomposition of the sulfides.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Allanite-(Ce)
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Habit: elongated prisms
Colour: black, very dark brown
Description: Very sharp terminated crystals crystals, up to half an inch in diameter and five or six inches in length, accompany pink fluorite. Massive material also occurs, intergrown with quartz, bastnaesite, pyrite, chalcopyrite, and white to greenish plagioclase (commonly stained brown). The allanite is not very radioactive and was identified by an x-ray diffraction test by Mary E. Mrose of the U. S. Geological Survey. She indicated that it gave an exceptionally clear pattern. It was obviously non-metamict, in keeping with its unaltered appearance and virtual lack of radioactivity. Note: Schooner misidentified these as staurolite in Zodac (1940).
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Robinson, George W. and Vandall T. King. (1988), What's New in Minerals? Mineralogical Record: 19(5): 332.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).; Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Almandine
Formula: Fe2+3Al2(SiO4)3
Description: The references provide no details, but almandine is a common accessory mineral of area metamorphic rocks.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Anorthite
Formula: Ca(Al2Si2O8)
Description: The references provide no details, but anorthite is a component of the diabase dike exposed in the cut.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Description: The references provide no details, but augite is a component of a basalt dike that cross-cuts the metamorphic rock in this area.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Bastnäsite-(Ce)
Formula: Ce(CO3)F
Habit: thin, irregular plates
Colour: brown, reddish-brown to yellowish-tan
Description: Irregular thin plates, as much as two or three inches across and a half of an inch thick, are intimately associated with massive allanite, white to greenish plagioclase, pink to purple fluorite, chalcopyrite and pyrite. Some may be altered to gray lanthanite?
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): CONNECTICUT MINERAL LOCALITY INDEX. Rocks & Minerals (Connecticut Issue), Volume 70, No. 6, p. 403.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).; Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Beryl
Formula: Be3Al2(Si6O18)
Reference: Kevin Czaja Collection
'Biotite'
Habit: anhedral
Colour: black
Description: Small grains incorporated into the contacts of the pegmatite.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Chalcopyrite
Formula: CuFeS2
Habit: anhedral
Colour: brassy-yellow to iridescent
Description: As small anhedral grains associated with pyrite, allanite, fluorite, plagioclase, biotite.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
'Fayalite-Forsterite Series' ?
Description: The references provide no details.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Fluorapatite
Formula: Ca5(PO4)3F
Habit: granular to prismatic
Colour: pale green
Fluorescence: yellow
Description: Small yellow fluorescing grains to short prisms in the pegmatite.
Reference: Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Fluorapatite var: Mn-bearing Fluorapatite
Formula: (Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Habit: granular to prismatic
Colour: pale green
Fluorescence: yellow
Description: Small yellow fluorescing grains to short prisms in the pegmatite.
Reference: Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Fluorite
Formula: CaF2
Habit: massive
Colour: colorless to deep red, pink, purple
Description: As irregular, cleaving masses with chalcopyrite, plagioclase, pyrite, allanite, bastnaesite. Thermoluminescent.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).; Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Fluorite var: Chlorophane
Formula: CaF2
Habit: massive
Colour: colorless to deep red, pink, purple
Description: As irregular, cleaving masses with chalcopyrite, plagioclase, pyrite, allanite, bastnaesite. Thermoluminescent.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).; Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Gypsum
Formula: CaSO4 · 2H2O
Habit: thin tabular, prismatic radiating clusters
Colour: white, colorless
Description: Very thin tabular crystals in limonitic seams in diabase. Fragile groups of radiating crystals, of equally small size, but having a prismatic habit, are occasionally observed, as an reaction of pyrite and fluorite, in the pegmatite dike.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).; Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Kaolinite
Formula: Al2(Si2O5)(OH)4
Description: The references provide no details, but kaolinite is a common weathering product of the feldspar component of area metamorphic rocks.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
'Labradorite'
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Description: The references provide no details, but anorthite is a component of the diabase dike exposed in the cut.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
'Lanthanite' ?
Colour: gray
Description: A possible weathering product of the basnaesite.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
'Limonite'
Formula: (Fe,O,OH,H2O)
Description: Abundant weathering product from the pyrite in the pegmatite.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Magnetite ?
Formula: Fe2+Fe3+2O4
Description: The references provide no details, may be a component of area metamorphic rocks.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
Description: The references provide no details, but a common weathering product of area rocks.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Microcline
Formula: K(AlSi3O8)
Habit: Prismatic with nearly square cross-section, twins.
Colour: Pale olive green
Description: Can occur as crystals with nearly square cross-section about 5 cm on a side, may be twinned. Some have good translucency and were called "hyalophane" by Schooner, reportedly tested by XRD and EDS, but no known testing published.
Reference: Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.; Schooner, Richard. (circa 1980s), Untitled manuscript on central Connecticut mineralogy.
Molybdenite ?
Formula: MoS2
Description: The references provide no details, may be in the pegmatite.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Description: Small flakes in pegmatite.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Pickeringite
Formula: MgAl2(SO4)4 · 22H2O
Description: The references provide little detail, a common weathering product of area rocks.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Pyrite
Formula: FeS2
Habit: anhedral
Description: Associated with allanite, plagioclase, fluorite, chalcopyrite, bastnaesite in the pegmatite, much of it altered to limonite.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Pyrrhotite
Formula: Fe7S8
Habit: massive
Description: In the pegmatite.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).; Schooner, Richard. (1961): THE MINERALOGY OF CONNECTICUT.
Quartz
Formula: SiO2
Habit: anhedral
Colour: light gray
Description: Component of the pegmatite as anhedral grains.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Scheelite
Formula: Ca(WO4)
Fluorescence: blue-white
Description: tiny specks or irregular masses
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Siderite ?
Formula: FeCO3
Description: The references provide no details.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Sillimanite
Formula: Al2(SiO4)O
Description: A common accessory of area metamorphic rocks.
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Sphalerite
Formula: ZnS
Description: Dark, noncrystalline blobs occasionally found
Reference: Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). R. M. Lytle collection
Staurolite
Formula: Fe2+2Al9Si4O23(OH)
Description: Schooner misidentified the later confirmed allanite as staurolite in Zodac (1940).
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.
Titanite
Formula: CaTi(SiO4)O
Description: The reference provides no detail, but a common accessory in area metamorphic rocks.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): CONNECTICUT MINERAL LOCALITY INDEX. Rocks & Minerals (Connecticut Issue), Volume 70, No. 6, p. 403.
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Habit: elongated prisms
Colour: dark brown to black
Description: Layer of fine-grained crystals concentrated at pegmatite/wall-rock contact.
Reference: Zodac, Peter. (1940): A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals, vol. 15, no. 11, p. 376.; Schooner, Richard. (1958): The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough).
Wulfenite ?
Formula: Pb(MoO4)
Description: The reference provides no details.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995): CONNECTICUT MINERAL LOCALITY INDEX. Rocks & Minerals (Connecticut Issue), Volume 70, No. 6, p. 403.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Molybdenite ?2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
var: Chlorophane3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Magnetite ?4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Bastnäsite-(Ce)5.BD.20aCe(CO3)F
Siderite ?5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Melanterite7.CB.35Fe2+(H2O)6SO4 · H2O
Pickeringite7.CB.85MgAl2(SO4)4 · 22H2O
Scheelite7.GA.05Ca(WO4)
Wulfenite ?7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
var: Mn-bearing Fluorapatite8.BN.05(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Allanite-(Ce)9.BG.05b{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Almandine9.AD.25Fe2+3Al2(SiO4)3
Anorthite9.FA.35Ca(Al2Si2O8)
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Beryl9.CJ.05Be3Al2(Si6O18)
Kaolinite9.ED.05Al2(Si2O5)(OH)4
'Labradorite'9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Sillimanite9.AF.05Al2(SiO4)O
Staurolite ?9.AF.30Fe2+2Al9Si4O23(OH)
Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Biotite'-
'Fayalite-Forsterite Series' ?-
'Lanthanite' ?-
'Limonite'-(Fe,O,OH,H2O)
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

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
Molybdenite ?2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite ?7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Siderite ?14.1.1.3FeCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Bastnäsite-(Ce)16a.1.1.1Ce(CO3)F
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Melanterite29.6.10.1Fe2+(H2O)6SO4 · H2O
AB2(XO4)4·H2O
Pickeringite29.7.3.1MgAl2(SO4)4 · 22H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Wulfenite ?48.1.3.1Pb(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 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
Sillimanite52.2.2a.1Al2(SiO4)O
Staurolite ?52.2.3.1Fe2+2Al9Si4O23(OH)
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)
Allanite-(Ce)58.2.1a.1{CaCe}{Al2Fe2+}(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
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
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
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Albite-Anorthite Series'-
Anorthite-Ca(Al2Si2O8)
'Biotite'-
'Fayalite-Forsterite Series' ?-
Fluorapatite
var: Mn-bearing Fluorapatite
-(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Fluorite
var: Chlorophane
-CaF2
Kaolinite-Al2(Si2O5)(OH)4
'Labradorite'-(Ca,Na)[Al(Al,Si)Si2O8]
'Lanthanite' ?-
'Limonite'-(Fe,O,OH,H2O)
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
H KaoliniteAl2(Si2O5)(OH)4
H MelanteriteFe2+(H2O)6SO4 · H2O
H PickeringiteMgAl2(SO4)4 · 22H2O
H GypsumCaSO4 · 2H2O
H Limonite(Fe,O,OH,H2O)
H Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H StauroliteFe22+Al9Si4O23(OH)
BeBeryllium
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
CCarbon
C Bastnäsite-(Ce)Ce(CO3)F
C SideriteFeCO3
OOxygen
O MicroclineK(AlSi3O8)
O Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
O AlmandineFe32+Al2(SiO4)3
O KaoliniteAl2(Si2O5)(OH)4
O MelanteriteFe2+(H2O)6SO4 · H2O
O PickeringiteMgAl2(SO4)4 · 22H2O
O SillimaniteAl2(SiO4)O
O Bastnäsite-(Ce)Ce(CO3)F
O TitaniteCaTi(SiO4)O
O BerylBe3Al2(Si6O18)
O GypsumCaSO4 · 2H2O
O Limonite(Fe,O,OH,H2O)
O ScheeliteCa(WO4)
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O AlbiteNa(AlSi3O8)
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
O Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
O MuscoviteKAl2(AlSi3O10)(OH)2
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O QuartzSiO2
O FluorapatiteCa5(PO4)3F
O AnorthiteCa(Al2Si2O8)
O MagnetiteFe2+Fe23+O4
O SideriteFeCO3
O WulfenitePb(MoO4)
O StauroliteFe22+Al9Si4O23(OH)
FFluorine
F Bastnäsite-(Ce)Ce(CO3)F
F Fluorite (var: Chlorophane)CaF2
F FluoriteCaF2
F Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
F FluorapatiteCa5(PO4)3F
NaSodium
Na AlbiteNa(AlSi3O8)
Na Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mg PickeringiteMgAl2(SO4)4 · 22H2O
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Al MicroclineK(AlSi3O8)
Al Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Al AlmandineFe32+Al2(SiO4)3
Al KaoliniteAl2(Si2O5)(OH)4
Al PickeringiteMgAl2(SO4)4 · 22H2O
Al SillimaniteAl2(SiO4)O
Al BerylBe3Al2(Si6O18)
Al AlbiteNa(AlSi3O8)
Al Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Al AnorthiteCa(Al2Si2O8)
Al StauroliteFe22+Al9Si4O23(OH)
SiSilicon
Si MicroclineK(AlSi3O8)
Si Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Si AlmandineFe32+Al2(SiO4)3
Si KaoliniteAl2(Si2O5)(OH)4
Si SillimaniteAl2(SiO4)O
Si TitaniteCaTi(SiO4)O
Si BerylBe3Al2(Si6O18)
Si AlbiteNa(AlSi3O8)
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si QuartzSiO2
Si AnorthiteCa(Al2Si2O8)
Si StauroliteFe22+Al9Si4O23(OH)
PPhosphorus
P Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
P FluorapatiteCa5(PO4)3F
SSulfur
S MelanteriteFe2+(H2O)6SO4 · H2O
S PickeringiteMgAl2(SO4)4 · 22H2O
S ChalcopyriteCuFeS2
S GypsumCaSO4 · 2H2O
S SphaleriteZnS
S PyrrhotiteFe7S8
S PyriteFeS2
S MolybdeniteMoS2
ClChlorine
Cl Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
KPotassium
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Ca TitaniteCaTi(SiO4)O
Ca GypsumCaSO4 · 2H2O
Ca ScheeliteCa(WO4)
Ca Fluorite (var: Chlorophane)CaF2
Ca FluoriteCaF2
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Ca Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Ca FluorapatiteCa5(PO4)3F
Ca AnorthiteCa(Al2Si2O8)
TiTitanium
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn Fluorapatite (var: Mn-bearing Fluorapatite)(Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
FeIron
Fe Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Fe AlmandineFe32+Al2(SiO4)3
Fe MelanteriteFe2+(H2O)6SO4 · H2O
Fe ChalcopyriteCuFeS2
Fe Limonite(Fe,O,OH,H2O)
Fe PyrrhotiteFe7S8
Fe PyriteFeS2
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe MagnetiteFe2+Fe23+O4
Fe SideriteFeCO3
Fe StauroliteFe22+Al9Si4O23(OH)
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
MoMolybdenum
Mo MolybdeniteMoS2
Mo WulfenitePb(MoO4)
CeCerium
Ce Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Ce Bastnäsite-(Ce)Ce(CO3)F
WTungsten
W ScheeliteCa(WO4)
PbLead
Pb WulfenitePb(MoO4)

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

Devonian - Silurian
358.9 - 443.8 Ma



ID: 3186140
Paleozoic sedimentary and volcanic rocks

Age: Paleozoic (358.9 - 443.8 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]

Ordovician - Cambrian
443.8 - 541 Ma



ID: 2851357
Brimfield Schist (Includes Hamilton Resevoir Formation)

Age: Paleozoic (443.8 - 541 Ma)

Stratigraphic Name: Brimfield Schist; Hamilton Resevoir Formation

Description: Gray, rusty-weathering, medium- to coarse-grained, interlayered schist and gneiss, composed of oligoclase, quartz, K-feldspar, and biotite, and commonly garnet, sillimanite, graphite, and pyrrhotite. K-feldspar partly as augen 1 to 3 cm across. Minor layers and lenses of hornblende- and pyroxene-bearing gneiss, amphibolite, and calc-silicate rock.

Comments: Part of Eastern Uplands; Iapetus (Oceanic) Terrane - Merrimack Synclinorium; Brimfield Schist and equivalent formations (includes Tatnic Hill Formation) (Upper? and Middle Ordovician). The age of the Brimfield Group in this area is Cambrian(?) based on the intrusion of 440 my Hedgehog Hill gneiss in the top of the Hamilton Reservoir Formation in the upper part of the Brimfield, although the top of the Brimfield may be Ordovician or older Paleozoic (Pease, 1989) per CT013. 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}, 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)
Zodac, Peter. (1940), A Chlorophane Occurrence Near East Hampton, Conn. Rocks & Minerals: 15(11): 376.
Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.
Schooner, Richard. (1961), The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Januzzi, Ronald. (1976), Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury.
Schooner, Richard. (circa 1980s), Untitled manuscript on central Connecticut mineralogy.
Robinson, George W. and Vandall T. King. (1988), What's New in Minerals? Mineralogical Record: 19(5): 332.
Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.


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