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Pelton's Quarry, Portland, Middlesex Co., Connecticut, USAi
Regional Level Types
Pelton's QuarryQuarry
Portland- not defined -
Middlesex Co.County
ConnecticutState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 36' 4'' North , 72° 34' 36'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Lake Pocotopaug3,436 (2017)5.5km
Cromwell13,750 (2017)5.7km
Portland5,862 (2017)6.2km
East Hampton2,691 (2017)6.8km
Middletown46,756 (2017)7.5km


Some references such as Otfinoski (1988) state that pegmatite quarrying probably began in the Middletown district in 1782 [sic] when Portland resident Ralph Pelton, Deacon of the Central Church, began working this quarry near his home just east of Collins Hill. However, Beers' (1884) The History of Middlesex County 1635-1885 states:

The fine feldspar mine, near Deacon Ralph PELTON's, has been worked by him since 1872. Several thousand tons of the stone have been taken out. A sample of the feldspar taken to the Centennial was pronounced the finest there. Fine beryls, garnets, etc., have been found here.

THE FELDSPAR MILL, near Deacon Ralph PELTON's, was built by him in 1877. The grinding is done by two stone chasers about five feet in diameter, moving around upon a bedstone of the same material. The crushed feldspar then passes to a revolving sieve, and thence to a cylinder, containing 3,300 pounds of Norway pebbles, of 18 revolutions per minute, where it is finely pulverized.


Somehow, 1872 was transposed to 1782 and the error was perpetuated. This is supported by Shepard (1837), who surveyed quarrying throughout the state in the 1830s and does not mention the Pelton Quarry, but discusses the Tollgate "China Stone" Quarry in Middletown numerous times. Nor does Robinson (1825).

The presence of Pelton's Quarry near Collins Hill has lead some to conclude that he started the quarrying at the hill's summit that later became the famous Strickland Quarry. But the presence of the old quarry at his property just to the east dispels that notion.

Little has been written about the mineralogy. Jarnot (1995), who gives the town incorrectly as Haddam, mentions "well-formed aquamarine crystals of a characteristic deep blue color, sometimes grading almost to black." Foye (1922) mentions that it "has long been inactive. It probably produced a number of rare minerals in its day, but it is now known as the source of two minerals, unique for the region, bismutite and samarskite [since found elsewhere]. Beryl and crystals of muscovite from the locality may be found in the Wesleyan museum." [see photos.] Wells (1887) analyzed a bismutite mass from here that was in the George Brush collection.

It has since been filled in. Coordinates are approximate. Private property.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


23 valid minerals. 1 erroneous literature entry.

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!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Rocks & Min.: 70:403
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Description: fka biotite
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: Rocks & Min.: 70:403
Bertrandite
Formula: Be4(Si2O7)(OH)2
Reference: Mineralogical Record (1975) 6:114-123
Beryl
Formula: Be3Al2(Si6O18)
Habit: elongated hexagonal prisms with pinacoidal terminations
Colour: blue-green, deep aqua to almost black
Description: Very well-formed and gemmy crystals, typically doubly-terminated.
Reference: Jarnot (1995)
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Habit: elongated hexagonal prisms, typically terminated by pinacoids
Colour: blue-green, deep aqua to almost black
Description: well formed crystals with characteristic deep blue color sometimes grading to almost black
Reference: Jarnot (1995) Connecticut Gems & Gem Minerals
Bismuthinite
Formula: Bi2S3
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Bismutite
Formula: (BiO)2CO3
Habit: massive replacement of bismuthinite
Colour: yellow-green to gray
Description: A mass in the George Brush collection was analyzed (Wells, 1887).
Reference: Wells, H. L. (1887), Bismutosphaerite from Willimantic and Portland. American Journal of Science: s. 3, 34: 271-4.
'Columbite-(Fe)-Columbite-(Mn) Series'
Habit: tabular
Colour: black with colorful iridescence
Reference: Rocks & Min.: 70:403
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Gahnite
Formula: ZnAl2O4
Habit: octahedral
Colour: dark green
Description: translucent, micro crystals and anhedral aggregates with beryl in smoky quartz
Reference: Harold Moritz collection
'Hornblende'
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Rocks & Min.: 70:403
Microcline
Formula: K(AlSi3O8)
Reference: Rocks & Min.: 70:403
'Monazite'
Reference: Dana 6: 1061.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: pseudohexagonal tabular to elongated crystals
Colour: dark silver to bronze
Description: Sharp, dark, well-formed crystals.
Reference: Januzzi, Ronald. (1976), Mineral Localities of Connecticut and Southeastern New York State. Taylor Associates/Mineralogical Press, Danbury.
Opal
Formula: SiO2 · nH2O
Reference: Jones, Robert W. (1960): LUMINESCENT MINERALS OF CONNECTICUT,
Opal var: Opal-AN
Formula: SiO2 · nH2O
Reference: Jones, Robert W. (1960): LUMINESCENT MINERALS OF CONNECTICUT,
Quartz
Formula: SiO2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Samarskite-(Y)
Formula: YFe3+Nb2O8
Description: Reported in the old literature, but probably not analyzed, may be ishikawaite because ishikawaite was confirmed by analysis at the nearby Penfield Quarry.
Reference: Dana 7:I:799.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Rocks & Min.: 70:403
Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
Description: Mistake for columbite-tantalite
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Uraninite
Formula: UO2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Xenotime-(Y) ?
Formula: Y(PO4)
Description: In a list of minerals without supporting information.
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.
Zircon
Formula: Zr(SiO4)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Zircon var: Cyrtolite
Formula: Zr[(SiO4),(OH)4]
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Bismuthinite2.DB.05Bi2S3
Group 4 - Oxides and Hydroxides
Gahnite4.BB.05ZnAl2O4
Magnetite4.BB.05Fe2+Fe3+2O4
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
Samarskite-(Y)4.DB.25YFe3+Nb2O8
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Bismutite5.BE.25(BiO)2CO3
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Fluorapatite8.BN.05Ca5(PO4)3F
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Xenotime-(Y) ?8.AD.35Y(PO4)
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Almandine9.AD.25Fe2+3Al2(SiO4)3
Annite9.EC.20KFe2+3(AlSi3O10)(OH)2
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Zircon9.AD.30Zr(SiO4)
var: Cyrtolite9.AD.30Zr[(SiO4),(OH)4]
Unclassified Minerals, Rocks, etc.
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
'Monazite'-
'Tantalite' ?-(Mn,Fe)(Ta,Nb)2O6

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:3
Bismuthinite2.11.2.3Bi2S3
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 7 - MULTIPLE OXIDES
AB2X4
Gahnite7.2.1.4ZnAl2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Samarskite-(Y)8.1.11.1YFe3+Nb2O8
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Bismutite16a.3.5.1(BiO)2CO3
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
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
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Uranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
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 borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Annite71.2.2b.3KFe2+3(AlSi3O10)(OH)2
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)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Beryl
var: Aquamarine
-Be3Al2Si6O18
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
'Monazite'-
Opal
var: Opal-AN
-SiO2 · nH2O
'Tantalite' ?-(Mn,Fe)(Ta,Nb)2O6
Xenotime-(Y) ?-Y(PO4)
Zircon
var: Cyrtolite
-Zr[(SiO4),(OH)4]

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
H Limonite(Fe,O,OH,H2O)
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H AnniteKFe32+(AlSi3O10)(OH)2
H BertranditeBe4(Si2O7)(OH)2
H Opal (var: Opal-AN)SiO2 · nH2O
H OpalSiO2 · nH2O
BeBeryllium
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be BertranditeBe4(Si2O7)(OH)2
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C Bismutite(BiO)2CO3
OOxygen
O BerylBe3Al2(Si6O18)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Beryl (var: Aquamarine)Be3Al2Si6O18
O Samarskite-(Y)YFe3+Nb2O8
O AlbiteNa(AlSi3O8)
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O Bismutite(BiO)2CO3
O MagnetiteFe2+Fe23+O4
O MicroclineK(AlSi3O8)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O AlmandineFe32+Al2(SiO4)3
O Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
O FluorapatiteCa5(PO4)3F
O Limonite(Fe,O,OH,H2O)
O QuartzSiO2
O SpessartineMn32+Al2(SiO4)3
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O UraniniteUO2
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O AnniteKFe32+(AlSi3O10)(OH)2
O BertranditeBe4(Si2O7)(OH)2
O Opal (var: Opal-AN)SiO2 · nH2O
O GahniteZnAl2O4
O ZirconZr(SiO4)
O OpalSiO2 · nH2O
O Xenotime-(Y)Y(PO4)
O Tantalite(Mn,Fe)(Ta,Nb)2O6
FFluorine
F FluorapatiteCa5(PO4)3F
NaSodium
Na AlbiteNa(AlSi3O8)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al BerylBe3Al2(Si6O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al AlbiteNa(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al AlmandineFe32+Al2(SiO4)3
Al SpessartineMn32+Al2(SiO4)3
Al AnniteKFe32+(AlSi3O10)(OH)2
Al GahniteZnAl2O4
SiSilicon
Si BerylBe3Al2(Si6O18)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si AlbiteNa(AlSi3O8)
Si MicroclineK(AlSi3O8)
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si AlmandineFe32+Al2(SiO4)3
Si Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Si QuartzSiO2
Si SpessartineMn32+Al2(SiO4)3
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Si AnniteKFe32+(AlSi3O10)(OH)2
Si BertranditeBe4(Si2O7)(OH)2
Si Opal (var: Opal-AN)SiO2 · nH2O
Si ZirconZr(SiO4)
Si OpalSiO2 · nH2O
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P FluorapatiteCa5(PO4)3F
P TorberniteCu(UO2)2(PO4)2 · 12H2O
P Xenotime-(Y)Y(PO4)
SSulfur
S BismuthiniteBi2S3
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K MicroclineK(AlSi3O8)
K AnniteKFe32+(AlSi3O10)(OH)2
CaCalcium
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca FluorapatiteCa5(PO4)3F
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
Mn Tantalite(Mn,Fe)(Ta,Nb)2O6
FeIron
Fe Samarskite-(Y)YFe3+Nb2O8
Fe MagnetiteFe2+Fe23+O4
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe AlmandineFe32+Al2(SiO4)3
Fe Limonite(Fe,O,OH,H2O)
Fe AnniteKFe32+(AlSi3O10)(OH)2
Fe Tantalite(Mn,Fe)(Ta,Nb)2O6
CuCopper
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
ZnZinc
Zn GahniteZnAl2O4
YYttrium
Y Samarskite-(Y)YFe3+Nb2O8
Y Xenotime-(Y)Y(PO4)
ZrZirconium
Zr Zircon (var: Cyrtolite)Zr[(SiO4),(OH)4]
Zr ZirconZr(SiO4)
NbNiobium
Nb Samarskite-(Y)YFe3+Nb2O8
Nb Tantalite(Mn,Fe)(Ta,Nb)2O6
TaTantalum
Ta Tantalite(Mn,Fe)(Ta,Nb)2O6
BiBismuth
Bi Bismutite(BiO)2CO3
Bi BismuthiniteBi2S3
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U UraniniteUO2
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dana 6:1061
Dana 7:I:799
Robinson, Samuel. (1825): A Catalogue of American Minerals, With Their Localities; Including All Which Are Known to Exist in the United States and British Provinces, And Having the Towns, Counties, and Districts in Each State and Province Arranged Alphabetically. With an Appendix, Containing Additional Localities and a Tabular View. Cummings, Hilliard, & Co., Boston.
Shepard, Charles U. (1837): Report on the Geological Survey of Connecticut.
J. H. Beers & Co. (1884): The History of Middlesex County 1635-1885.
Wells, H. L. (1887), Bismutosphaerite from Willimantic and Portland. American Journal of Science: s. 3, 34: 271-4.
Foye, Wilbur. G., (1922): Mineral Localities in the Vicinity of Middletown, Connecticut. American Mineralogist: 7: 4-12.
Schairer, J. F. (1931): The Minerals of Connecticut. State Geological and Natural History Survey Bulletin 51.
Zodac, Peter (1941): The Andrews Quarry Near Portland, Conn. Rocks and Minerals: 16(5): 164-167.
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.
Stugard, Frederick, Jr. (1958): Pegmatites of the Middletown Area, Connecticut. USGS Bulletin 1042-Q.
Jones, Robert W. (1960): Luminescent Minerals of Connecticut, a Guide to Their Properties and Locations.
Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Henderson, William A., Jr. (1975): The Bertrandites of Connecticut. Mineralogical Record: 6(3): 114-123.
Januzzi, Ronald E. (1976): Mineral Localities of CT and Southeastern NY State. Mineralogical Press, Danbury.
Otfinoski, Carla (1988): Pegmatite Quarrying In the Middletown District. Unpublished masters thesis. Wesleyan University, Middletown, Connecticut.
Jarnot, Bruce. (1995): Connecticut Gems & Gem Minerals. Rocks & Minerals (Connecticut Issue): 70(6): 378-382.
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403.

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