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Tolland County, Connecticut, USAi
Regional Level Types
Tolland CountyCounty
ConnecticutState
USACountry

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PhotosMapsSearchMineralogy
Type:
Largest Settlements:
PlacePopulation
Mansfield City26,439 (2017)
Storrs15,344 (2017)
Tolland14,891 (2017)
Ellington14,693 (2017)
Stafford12,029 (2017)
Hebron9,298 (2017)
Mindat Locality ID:
23080
Long-form identifier:
mindat:1:2:23080:8
GUID (UUID V4):
0
Other Languages:
French:
Comté de Tolland, Connecticut, États-Unis
German:
Tolland County, Connecticut, Vereinigte Staaten
Italian:
Contea di Tolland, Connecticut, Stati Uniti d'America
Russian:
Толланд, Коннектикут, Соединённые Штаты Америки
Simplified Chinese:
托兰县, 康乃狄克州, 美国
Spanish:
Condado de Tolland, Connecticut, Estados Unidos
Albanian:
Tolland County, Connecticut, Shtetet e Bashkuara të Amerikës
Arabic:
مقاطعة تولاند, كونيتيكت, الولايات المتحدة
Armenian:
Թոլանդ շրջան, Կոնեկտիկուտ, Ամերիկայի Միացյալ Նահանգներ
Basque:
Tolland konderria, Connecticut
Bavarian:
Tolland County, Connecticut, Vaoanigte Stootn
Bishnupriya Manipuri:
টোলল্যান্ড কাউন্টি, কানেকটিকাট, তিলপারাষ্ট্র
Bulgarian:
Толънд, Кънектикът, Съединени американски щати
Cebuano:
Tolland County, Connecticut
Dutch:
Tolland County, Connecticut, Verenigde Staten
Farsi/Persian:
شهرستان تولند، کنتیکت, کنتیکت, ایالات متحده آمریکا
Finnish:
Tollandin piirikunta, Connecticut, Yhdysvallat
Hungarian:
Tolland megye, Connecticut, Amerikai Egyesült Államok
Irish Gaelic:
Contae Tolland, Connecticut, Stáit Aontaithe Mheiriceá
Japanese:
トランド郡, コネチカット州, アメリカ合衆国
Low Saxon/Low German:
Tolland County, Connecticut, USA
Min Dong Chinese:
Tolland Gông, Connecticut
Norwegian:
Tolland County, Connecticut, USA
Polish:
Hrabstwo Tolland, Connecticut, Stany Zjednoczone
Portuguese:
Condado de Tolland, Connecticut, Estados Unidos
Romanian:
Comitatul Tolland, Connecticut, Statele Unite ale Americii
Serbian:
Округ Таланд, Конектикат, Сједињене Америчке Државе
Serbo-Croatian:
Tolland County, Connecticut, Sjedinjene Američke Države
Swedish:
Tolland County, Connecticut, USA
Turkish:
Tolland County, Connecticut, Amerika Birleşik Devletleri
Ukrainian:
Толленд, Коннектикут, Сполучені Штати Америки
Urdu:
ٹولینڈ کاؤنٹی، کنیکٹیکٹ, کنیکٹیکٹ, ریاستہائے متحدہ امریکا
Vietnamese:
Quận Tolland, Connecticut, Chủng Quốc Hoa Kỳ
Waray:
Condado han Tolland, Connecticut, Estados Unidos
Western Punjabi:
ٹولینڈ کاؤنٹی, کنکٹیکٹ, امریکہ


No description has been added for this locality. Can you add one?

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

54 valid minerals.

* - Minerals that have never been found, but their existence is inferred in some way (e.g. from pseudomorphs)

Rock Types Recorded


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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Albite
Formula: Na(AlSi3O8)
Colour: greenish
Description: large plates, translucent and in some cases nearly transparent, of a greenish color
Albite var. Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Almandine
Formula: Fe2+3Al2(SiO4)3
Habit: trapezohedral
Colour: red to maroon
Description: Pocket crystals with finely striated faces can reach over 7 cm. Compositionally zoned, with up to about 0.2 mole fraction grossular, 0.15 mole fraction pyrope, and 0.05 mole fraction spessartine - more toward the crystals' cores.
'Amphibole Supergroup'
Formula: AB2C5(T8O22)W2
'Amphibole Supergroup var. Byssolite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Habit: capillary
Colour: white
Description: Scattered capillary crystals in fracture voids.
Anhydrite
Formula: CaSO4
Habit: tabular
Description: Tabular crystals to 3 cm that were epimorphed or encrusted by drusy quartz before later naturally dissolving away leaving voids.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Habit: rhombohedral
Description: Typical small rhombs <1 cm. Uncertain in the reference if the crystals are true ankerite under the revised definition, or ferroan dolomite, or how to distinguish them from the much more common magnesite.
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Anorthite
Formula: Ca(Al2Si2O8)
Habit: anhedral
Description: component of the host metagabbro, composition An70-80.
'Apatite'
Formula: Ca5(PO4)3A
Arsenopyrite
Formula: FeAsS
Azurite
Formula: Cu3(CO3)2(OH)2
Habit: Tabular to tapered groups
Colour: Very dark blue
Description: Mostly massive, found in massive quartz with massive chalcocite, malachite, fluorite.
Baddeleyite
Formula: ZrO2
Baryte
Formula: BaSO4
Habit: massive tabular, subparallel overgrowths with curved faces, short prismatic to acicular
Colour: white, creamy tan, blue, yellow, colorless
Fluorescence: rarely yellow-white, or blue-green primarily under SW
Description: There appear to be three generations of baryte crystallization: 1) an initial coarse-grained, tabular to massive, opaque white phase in massive quartz and fluorite, 2) a translucent, creamy tan overgrowth phase usually in subparallel orientation on the white barite in voids within the previous matrix, some from the dissolution of fluorite, and 3) a transparent, colorless to blue overgrowth phase on either phase 1 or 2 baryte crystals, or isolated. All three phases of crystals can show varying degrees of surface etching. Small tabular white crystals and yellow, transparent, acicular crystals are also known.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Habit: tabular
Colour: black
Description: Mostly as a component of the host metagabbro, but also as euhedral crystals in the open veins to about 1 cm.
Bonaccorsiite
Formula: KK2Na3(Al6Si36)O84
Calcite
Formula: CaCO3
Habit: flat rhombohedra, usually in rosette aggregates
Colour: white to colorless
Description: As rosette aggregates to around 5 mm, a late-forming mineral usually found on top of the high P-T assemblage.
'Chabazite'
Habit: rhombohedral
Colour: white
Description: drusy crystals on epidote in fractures in gneiss
Chalcocite
Formula: Cu2S
Habit: massive
Colour: black with slight bluish iridescence
Description: mm-scale grains and irregular masses with sphalerite in albite/quartz/muscovite host. The sulfide grains are embedded in the silicates suggesting the former are primary.
Chalcopyrite
Formula: CuFeS2
Description: A rarer accessory mineral in the vein assemblage.
'Chlorite Group'
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Habit: massive
Colour: dark green
Description: In matrix near hydrothermally altered fractures.
'Clinopyroxene Subgroup'
Habit: anhedral
Colour: black
Description: A component of the host metagabbro.
Cordierite
Formula: Mg2Al4Si5O18
'Crichtonite Group'
Formula: AD21O38 or A{DE2G6Ti12}O38
Cummingtonite
Formula: ◻Mg2Mg5(Si8O22)(OH)2
Description: Metamorphic retrograde alteration of pyroxene.
Davidite-(Ce)
Formula: Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Habit: prismatic
Colour: yellow-green to dark green to black
Description: drusy crystals in fractures in gneiss, crystallized in two generations, an initial one with elongated, larger and darker crystals and a second one of much finer-grained, short and lighter colored crystals. The second generation coats the first and some other minerals like quartz.
Epistilbite
Formula: CaAl2Si6O16 · 5H2O
Fluorapatite
Formula: Ca5(PO4)3F
Habit: elongated prismatic
Colour: white to pale green
Fluorescence: yellow under short wave UV
Description: Small crystals in gneiss.
Fluorite
Formula: CaF2
Habit: cubic with tetrahexahedral overgrowths
Colour: colorless, pale blue, purple, green
'Garnet Group'
Formula: X3Z2(SiO4)3
Goethite
Formula: Fe3+O(OH)
Habit: massive, earthy
Colour: dark brown
Graphite
Formula: C
Hematite
Formula: Fe2O3
Colour: red
Description: earthy red massive material, dissolved in HCl with positive results for iron (as opposed to copper)
'Heulandite Subgroup'
Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Colour: colorless to white
Description: micro drusy crystals with epidote and zeolites in fractures in gneiss
'Hornblende Root Name Group'
Formula: ◻Ca2(C2+4C3+)(AlSi7O22)W2
Ilmenite
Formula: Fe2+TiO3
'K Feldspar'
'K Feldspar var. Adularia'
Formula: KAlSi3O8
Kyanite
Formula: Al2(SiO4)O
Habit: elongated bladed prisms flattened parallel to (100), solitary or in feathery aggregates
Colour: colorless, gray, light to dark blue blue
Description: As free standing crystals to 5 cm in the open vein assemblage - a rarity in the state, typically with ragged edges and coated/partially altered to gray-green sericite/chlorite/clay minerals, though some are well terminated.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
'Limonite'
Loveringite
Formula: (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Magnesio-hornblende
Formula: ◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Habit: elongated prismatic
Colour: black
Description: Mostly as a metamorphic retrograde alteration of pyroxene in the host metagabbro, but also as an uncommon mineral in the open vein assemblage - a rarity in the state. Crystals to 1 cm.
Magnesite
Formula: MgCO3
Habit: rhombohedral
Colour: tan to brown
Description: Small rhombs <1 cm common, but crystals can reach several cm. Much more common than reported ankerite. Iron typically in the range of 0.05-0.30 apfu, though reportedly a few samples have outer rims grading to pure siderite.
Magnesite var. Iron-bearing Magnesite
Formula: (Mg,Fe)CO3
Habit: rhombohedral
Colour: tan to light brown
Description: Crystals to several cm. Much more common than reported ankerite. Iron typically in the range of 0.05-0.30 apfu, though reportedly a few samples have outer rims grading to pure siderite.
Magnetite
Formula: Fe2+Fe3+2O4
Malachite
Formula: Cu2(CO3)(OH)2
Habit: radiating acicular, mossy aggregates
Colour: green
Description: alteration of chalcocite, typically with azurite in massive quartz and fluorite
Microcline
Formula: K(AlSi3O8)
Habit: massive
Colour: white
Fluorescence: deep red
Description: in pegmatites cross-cutting the gneiss within the road cuts
Molybdenite
Formula: MoS2
Habit: tabular, subhedral
Colour: silvery gray
Description: crystal 23 mm collected by Fred Schuster during construction
'Monazite Group'
Formula: REE(PO4)
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
'Orthopyroxene Subgroup'
Habit: anhedral
Description: A major component of the host metagabbro.
'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Habit: platy aggregates
Colour: pale green
Description: drusy crystal aggregates with zeolites and epidote in fractures in gneiss
Pyrite
Formula: FeS2
Localities: Reported from at least 8 localities in this region.
Habit: cubic
Colour: pale brassy
Description: A low-temp mineral of the open vein assemblages, typically as druses coating the earlier high P-T assemblage. Rarely as cubes typically about 1 cm, can form complex rosette aggregates to over 5 cm across and 3.5 cm thick.
'Pyroxene Group'
Formula: ADSi2O6
Description: rounded grains in a calcite vein.
Pyrrhotite
Formula: Fe1-xS
Habit: tabular pseudohexagonal
Colour: bronzy
Description: A rare accessory mineral of the open vein assemblage. Euhedral crystals to 1.5 cm very rare in Connecticut - this may be the only such locality.
Quartz
Formula: SiO2
Localities: Reported from at least 8 localities in this region.
Habit: stubby prismatic, complex parallel-growth, corn cob
Colour: colorless to milky (typically in an outer zone)
Description: large complex crystals to 10 cm or more, smaller crystals radially encrusted acicular laumontite creating coarse columns of crystals
Quartz var. Amethyst
Formula: SiO2
Quartz var. Milky Quartz
Formula: SiO2
Habit: stubby prismatic, complex parallel-growth, corn cob
Colour: colorless to milky
Description: large complex crystals to 10 cm or more, smaller crystals radially encrusted acicular laumontite creating coarse columns of crystals
Quartz var. Rose Quartz
Formula: SiO2
Quartz var. Smoky Quartz
Formula: SiO2
Habit: scepters, reverse scepters, Tessin habit
Colour: smoky
Description: A common mineral in the open vein assemblage. Mostly small <1-1.5 cm crystals with wide variety of complex forms, Tessin and scepters, reverse scepters and combinations. Many are doubly-terminated. Larger crystals can reach up to 7 cm and are typically Tessin habit showing the various steep positive rhombohedra, such as {20bar21}, {30bar31} and {50bar53} and their negative equivalents {03bar32}, {02bar21}, {03bar31} and {05bar53}.
Romanèchite
Formula: (Ba,H2O)2(Mn4+,Mn3+)5O10
Habit: botryoidal
Colour: very dark brown to black
Description: As masses with conchoidal fracture and black streak in quartz with azurite and malachite. Analyzed 2016 by Peter Cristofono and Tom Mortimer using EDS. Closest other analytical possibility is hollandite, which has a slightly higher Ba:Mn ratio, and doesn't match the physical properties of this material as well as romanechite does.
Rutile
Formula: TiO2
Habit: elongated, striated prisms.
Colour: red
Description: An accessory mineral in the open vein assemblage, as microcrystals.
'Scapolite'
Habit: elongated prismatic to massive
Colour: white, pale pink to peach
Description: Crude crystals and masses in calc-silicate assemblages in the metamorphic rocks.
References:
Harold Moritz CollectionIdentified by Harold Moritz: Visual Identification
Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Siderite
Formula: FeCO3
Habit: rhombohedral
Description: As outer rims of a few analyzed magnesite crystals.
Sillimanite
Formula: Al2(SiO4)O
Habit: elongated prisms
Colour: brown
Description: Crystals to 7 cm in subparallel alignment in quartz-rich segregations, just like at Chester, Norwich and Willimantic - all from exposures of the Tatnic Hill Formation.
'Soapstone'
Sphalerite
Formula: ZnS
Habit: rounded grains
Colour: yellow
Description: mm-scale rounded, clear grains with chalcocite in albite/quartz/muscovite. Sulfide grains are embedded in the silicates suggesting the former are primary.
Spinel
Formula: MgAl2O4
Srilankite
Formula: TiO2
Staurolite
Formula: Fe2+2Al9Si4O23(OH)
Localities: Reported from at least 7 localities in this region.
Habit: prismatic, twinned
Colour: dark brown
Description: "in large crystals, often forming the cross"
'Stilbite Subgroup'
Formula: M6-7[Al8-9Si27-28O72] · nH2O
Habit: platy
Description: drusy crystals with epidote and zeolites in fractures in gneiss
Talc
Formula: Mg3Si4O10(OH)2
Titanite
Formula: CaTiO(SiO4)
'Tourmaline'
Formula: AD3G6(T6O18)(BO3)3X3Z
Habit: trigonal elongated, striated prisms with rhombhedral terminations
Colour: black
Description: very sharp, lustrous pocket crystals to several cms. Species likely schorl or perhaps dravite.
'Xenotime'
Zircon
Formula: Zr(SiO4)
Description: A rare accessory mineral in the open vein assemblage.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Chalcocite2.BA.05Cu2S
Sphalerite2.CB.05aZnS
Chalcopyrite2.CB.10aCuFeS2
Pyrrhotite2.CC.10Fe1-xS
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Arsenopyrite2.EB.20FeAsS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Goethite4.00.Fe3+O(OH)
Magnetite4.BB.05Fe2+Fe3+2O4
Spinel4.BB.05MgAl2O4
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Davidite-(Ce)4.CC.40Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Loveringite4.CC.40(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Quartz
var. Amethyst
4.DA.05SiO2
4.DA.05SiO2
var. Rose Quartz4.DA.05SiO2
var. Smoky Quartz4.DA.05SiO2
var. Milky Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Srilankite4.DB.25TiO2
Baddeleyite4.DE.35ZrO2
Romanèchite4.DK.10(Ba,H2O)2(Mn4+,Mn3+)5O10
Group 5 - Nitrates and Carbonates
Magnesite
var. Iron-bearing Magnesite
5.AB.05(Mg,Fe)CO3
Calcite5.AB.05CaCO3
Magnesite5.AB.05MgCO3
Siderite5.AB.05FeCO3
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Azurite5.BA.05Cu3(CO3)2(OH)2
Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anhydrite ?7.AD.30CaSO4
Baryte7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
Almandine9.AD.25Fe2+3Al2(SiO4)3
Zircon9.AD.30Zr(SiO4)
Sillimanite9.AF.05Al2(SiO4)O
Kyanite9.AF.15Al2(SiO4)O
Staurolite9.AF.30Fe2+2Al9Si4O23(OH)
Titanite9.AG.15CaTiO(SiO4)
Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Cordierite9.CJ.10Mg2Al4Si5O18
Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Cummingtonite9.DE.05◻Mg2Mg5(Si8O22)(OH)2
Actinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Magnesio-hornblende9.DE.10◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Annite9.EC.20KFe2+3(AlSi3O10)(OH)2
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Bonaccorsiite9.FA.KK2Na3(Al6Si36)O84
Microcline9.FA.30K(AlSi3O8)
Albite9.FA.35Na(AlSi3O8)
var. Andesine9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Anorthite9.FA.35Ca(Al2Si2O8)
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Epistilbite9.GD.45CaAl2Si6O16 · 5H2O
Unclassified
'K Feldspar
var. Adularia'
-KAlSi3O8
'Amphibole Supergroup'-AB2C5(T8O22)W2
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
'Chabazite'-
'Chlorite Group'-
'Heulandite Subgroup'-(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
'Limonite'-
'Monazite Group'-REE(PO4)
'Stilbite Subgroup'-M6-7[Al8-9Si27-28O72] · nH2O
'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
'Xenotime'-
'Clinopyroxene Subgroup'-
'Scapolite'-
'Hornblende Root Name Group'-◻Ca2(C2+4C3+)(AlSi7O22)W2
'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
'Soapstone'-
'K Feldspar'-
'Pyroxene Group'-ADSi2O6
'Garnet Group'-X3Z2(SiO4)3
'Amphibole Supergroup
var. Byssolite'
-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Orthopyroxene Subgroup'-
'Crichtonite Group'-AD21O38 or A{DE2G6Ti12}O38
'Apatite'-Ca5(PO4)3A

List of minerals for each chemical element

HHydrogen
H Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
H AnniteKFe32+(AlSi3O10)(OH)2
H AzuriteCu3(CO3)2(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
H ClinochloreMg5Al(AlSi3O10)(OH)8
H Cummingtonite◻Mg2Mg5(Si8O22)(OH)2
H Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
H Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
H EpistilbiteCaAl2Si6O16 · 5H2O
H GoethiteFe3+O(OH)
H Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
H LaumontiteCaAl2Si4O12 · 4H2O
H Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
H MalachiteCu2(CO3)(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H PrehniteCa2Al2Si3O10(OH)2
H Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
H SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
H StauroliteFe22+Al9Si4O23(OH)
H Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
H TalcMg3Si4O10(OH)2
H Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
BBoron
B SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
B TourmalineAD3G6(T6O18)(BO3)3X3Z
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C AzuriteCu3(CO3)2(OH)2
C Magnesite var. Iron-bearing Magnesite(Mg,Fe)CO3
C CalciteCaCO3
C GraphiteC
C MagnesiteMgCO3
C MalachiteCu2(CO3)(OH)2
C SideriteFeCO3
OOxygen
O Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
O K Feldspar var. AdulariaKAlSi3O8
O AlbiteNa(AlSi3O8)
O Quartz var. AmethystSiO2
O Amphibole SupergroupAB2C5(T8O22)W2
O Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
O AnhydriteCaSO4
O AnkeriteCa(Fe2+,Mg)(CO3)2
O AnniteKFe32+(AlSi3O10)(OH)2
O AnorthiteCa(Al2Si2O8)
O AzuriteCu3(CO3)2(OH)2
O AlmandineFe32+Al2(SiO4)3
O BaddeleyiteZrO2
O BaryteBaSO4
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
O Magnesite var. Iron-bearing Magnesite(Mg,Fe)CO3
O CalciteCaCO3
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
O ClinochloreMg5Al(AlSi3O10)(OH)8
O CordieriteMg2Al4Si5O18
O Cummingtonite◻Mg2Mg5(Si8O22)(OH)2
O Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
O Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
O EpistilbiteCaAl2Si6O16 · 5H2O
O FluorapatiteCa5(PO4)3F
O GoethiteFe3+O(OH)
O HematiteFe2O3
O Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
O IlmeniteFe2+TiO3
O KyaniteAl2(SiO4)O
O LaumontiteCaAl2Si4O12 · 4H2O
O Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
O MagnesiteMgCO3
O Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
O MagnetiteFe2+Fe23+O4
O MalachiteCu2(CO3)(OH)2
O MicroclineK(AlSi3O8)
O Monazite GroupREE(PO4)
O MuscoviteKAl2(AlSi3O10)(OH)2
O PrehniteCa2Al2Si3O10(OH)2
O QuartzSiO2
O Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
O Quartz var. Rose QuartzSiO2
O RutileTiO2
O SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
O SideriteFeCO3
O SillimaniteAl2(SiO4)O
O Quartz var. Smoky QuartzSiO2
O SpinelMgAl2O4
O SrilankiteTiO2
O StauroliteFe22+Al9Si4O23(OH)
O Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
O TalcMg3Si4O10(OH)2
O TitaniteCaTiO(SiO4)
O TourmalineAD3G6(T6O18)(BO3)3X3Z
O ZirconZr(SiO4)
O Quartz var. Milky QuartzSiO2
O Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
O Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
O Pyroxene GroupADSi2O6
O Garnet GroupX3Z2(SiO4)3
O Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Crichtonite GroupAD21O38 or A{DE2G6Ti12}O38
O ApatiteCa5(PO4)3A
O BonaccorsiiteKK2Na3(Al6Si36)O84
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
F Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
F Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
NaSodium
Na AlbiteNa(AlSi3O8)
Na Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Na Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Na SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Na Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Na BonaccorsiiteKK2Na3(Al6Si36)O84
MgMagnesium
Mg Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mg Magnesite var. Iron-bearing Magnesite(Mg,Fe)CO3
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg CordieriteMg2Al4Si5O18
Mg Cummingtonite◻Mg2Mg5(Si8O22)(OH)2
Mg Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Mg MagnesiteMgCO3
Mg Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Mg SpinelMgAl2O4
Mg TalcMg3Si4O10(OH)2
AlAluminium
Al K Feldspar var. AdulariaKAlSi3O8
Al AlbiteNa(AlSi3O8)
Al Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Al AnniteKFe32+(AlSi3O10)(OH)2
Al AnorthiteCa(Al2Si2O8)
Al AlmandineFe32+Al2(SiO4)3
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al CordieriteMg2Al4Si5O18
Al Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Al EpistilbiteCaAl2Si6O16 · 5H2O
Al Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Al KyaniteAl2(SiO4)O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Al Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al PrehniteCa2Al2Si3O10(OH)2
Al SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Al SillimaniteAl2(SiO4)O
Al SpinelMgAl2O4
Al StauroliteFe22+Al9Si4O23(OH)
Al Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Al Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Al Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Al Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al BonaccorsiiteKK2Na3(Al6Si36)O84
SiSilicon
Si Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Si K Feldspar var. AdulariaKAlSi3O8
Si AlbiteNa(AlSi3O8)
Si Quartz var. AmethystSiO2
Si Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Si AnniteKFe32+(AlSi3O10)(OH)2
Si AnorthiteCa(Al2Si2O8)
Si AlmandineFe32+Al2(SiO4)3
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si CordieriteMg2Al4Si5O18
Si Cummingtonite◻Mg2Mg5(Si8O22)(OH)2
Si Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Si EpistilbiteCaAl2Si6O16 · 5H2O
Si Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Si KyaniteAl2(SiO4)O
Si LaumontiteCaAl2Si4O12 · 4H2O
Si Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si PrehniteCa2Al2Si3O10(OH)2
Si QuartzSiO2
Si Quartz var. Rose QuartzSiO2
Si SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Si SillimaniteAl2(SiO4)O
Si Quartz var. Smoky QuartzSiO2
Si StauroliteFe22+Al9Si4O23(OH)
Si Stilbite SubgroupM6-7[Al8-9Si27-28O72] · nH2O
Si TalcMg3Si4O10(OH)2
Si TitaniteCaTiO(SiO4)
Si ZirconZr(SiO4)
Si Quartz var. Milky QuartzSiO2
Si Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Si Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Si Pyroxene GroupADSi2O6
Si Garnet GroupX3Z2(SiO4)3
Si Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si BonaccorsiiteKK2Na3(Al6Si36)O84
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Monazite GroupREE(PO4)
P ApatiteCa5(PO4)3A
SSulfur
S AnhydriteCaSO4
S ArsenopyriteFeAsS
S BaryteBaSO4
S ChalcopyriteCuFeS2
S ChalcociteCu2S
S MolybdeniteMoS2
S PyriteFeS2
S PyrrhotiteFe1-xS
S SphaleriteZnS
ClChlorine
Cl Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K K Feldspar var. AdulariaKAlSi3O8
K AnniteKFe32+(AlSi3O10)(OH)2
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
K Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K BonaccorsiiteKK2Na3(Al6Si36)O84
CaCalcium
Ca Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Ca Albite var. Andesine(Na,Ca)[Al(Si,Al)Si2O8]
Ca AnhydriteCaSO4
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca AnorthiteCa(Al2Si2O8)
Ca CalciteCaCO3
Ca Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Ca EpistilbiteCaAl2Si6O16 · 5H2O
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
Ca Heulandite Subgroup(Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Ca Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Ca PrehniteCa2Al2Si3O10(OH)2
Ca TitaniteCaTiO(SiO4)
Ca Hornblende Root Name Group◻Ca2(C42+C3+)(AlSi7O22)W2
Ca Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Ca ApatiteCa5(PO4)3A
TiTitanium
Ti BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Ti Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Ti IlmeniteFe2+TiO3
Ti Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Ti RutileTiO2
Ti SrilankiteTiO2
Ti TitaniteCaTiO(SiO4)
Ti Amphibole Supergroup var. ByssoliteAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti Crichtonite GroupAD21O38 or A{DE2G6Ti12}O38
VVanadium
V Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
CrChromium
Cr Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Cr Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
MnManganese
Mn Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
FeIron
Fe Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe AnniteKFe32+(AlSi3O10)(OH)2
Fe ArsenopyriteFeAsS
Fe AlmandineFe32+Al2(SiO4)3
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fe Magnesite var. Iron-bearing Magnesite(Mg,Fe)CO3
Fe ChalcopyriteCuFeS2
Fe Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Fe Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Fe GoethiteFe3+O(OH)
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2
Fe PyrrhotiteFe1-xS
Fe SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Fe SideriteFeCO3
Fe StauroliteFe22+Al9Si4O23(OH)
CuCopper
Cu AzuriteCu3(CO3)2(OH)2
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS
AsArsenic
As ArsenopyriteFeAsS
YYttrium
Y Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
ZrZirconium
Zr BaddeleyiteZrO2
Zr Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
Zr ZirconZr(SiO4)
MoMolybdenum
Mo MolybdeniteMoS2
BaBarium
Ba BaryteBaSO4
Ba Romanèchite(Ba,H2O)2(Mn4+,Mn3+)5O10
LaLanthanum
La Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
CeCerium
Ce Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Ce Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
UUranium
U Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38

Fossils

There are 1 fossil locality from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences1
Youngest Fossil Listed191 Ma (Early Jurassic)
Oldest Fossil Listed201 Ma (Early Jurassic)
Stratigraphic Units
UnitNo. OccurrencesAge
Agawam - Portland1201.3 - 190.8 Ma (Early Jurassic)
Fossils from RegionClick here to show the list.
Accepted NameHierarchy Age
Reptilia
class
Animalia : Chordata : Reptilia201.3 - 190.8 Ma
Early Jurassic
Fossil LocalitiesClick to show 1 fossil locality

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Tolland_County,_Connecticut
Wikidata ID:Q54246
GeoNames ID:4844275

Localities in this Region

Other Regions, Features and Areas that Intersect

North AmericaContinent
North America PlateTectonic Plate

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