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Becker Quarry, Willington, Tolland County, Connecticut, USA i
Regional Level Types
Becker Quarry Quarry
Willington Town
Tolland County County
Connecticut State
USA Country

Regional Level Types
Becker Quarry	Quarry
Willington	Town
Tolland County	County
Connecticut	State
USA	Country

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Predictive Mineralogy

Magnesite, etc.

Becker Quarry, Willington, Tolland County, Connecticut, USA

Calcite

Becker Quarry, Willington, Tolland County, Connecticut, USA

Calcite

Becker Quarry, Willington, Tolland County, Connecticut, USA

Magnesite, etc.

Becker Quarry, Willington, Tolland County, Connecticut, USA

Calcite

Becker Quarry, Willington, Tolland County, Connecticut, USA

Calcite

Becker Quarry, Willington, Tolland County, Connecticut, USA

Magnesite, etc.

Becker Quarry, Willington, Tolland County, Connecticut, USA

Calcite

Becker Quarry, Willington, Tolland County, Connecticut, USA

Latitude & Longitude (WGS84):

41° 52' 19'' North , 72° 16' 24'' West

Latitude & Longitude (decimal):

Type:

Köppen climate type:

Dfb : Warm-summer humid continental climate

Nearest Settlements:

Place	Population	Distance
Storrs	15,344 (2017)	7.4km
Tolland	14,891 (2017)	7.9km
Stafford Springs	4,988 (2017)	9.4km
Crystal Lake	1,945 (2017)	10.9km
South Coventry	1,483 (2017)	11.6km

Nearest Clubs:
Local clubs are the best way to get access to collecting localities

Club	Location	Distance
Connecticut Valley Mineral Club	Springfield, Massachusetts	36km

Mindat Locality ID:

3713

Long-form identifier:

mindat:1:2:3713:9

GUID (UUID V4):

Other/historical names associated with this locality:

Becker's Quarry

Quarry operated by Becker Construction Co.

Most famous for its Tessin habit and sceptered quartz crystals, plus assemblage of magnesite, almandine, pyrite, tourmaline, and free-standing kyanite crystals. As described by Ague (1995), the host rock is a granulite facies mafic gneiss (metagabbro) consisting of anorthite (An70-80), clinopyroxene, orthopyroxene and biotite with accessory quartz, and retrograde magnesio-hornblende and cummingtonite. Hydrothermal vein minerals formed in open Alpine-type fractures that cross-cut the foliation of the bedrock when it was under amphibolite facies conditions - about 15-30 km deep and 500-550 degrees C. The most common assemblage is quartz-almandine-kyanite-magnesite-biotite-albite (An20-40)-ankerite-muscovite. Less common is quartz-almandine-magnesio-hornblende-magnesite-albite (An20-40)-ankerite-biotite. Also in the veins are accessory staurolite, fluorapatite, tourmaline, zircon, ilmenite, pyrrhotite and chalcopyrite crystals (and rutile not mentioned by Ague). Calcite and pyrite formed under lower P-T conditions much later. Many minerals are coated with a dull gray-green layer of very fine-grained, retrograde sericite/chlorite/clay.

This is an operating quarry and collecting is not allowed without permission, which in recent years is rarely given.

Aggregate material has been known to contain pyrrhotite and may have caused problems with concrete foundations of homes.

A discovery at this site was of oriented needles of rutile and ilmenite in garnet crystals from granulite facies metapelitic rocks of the Merrimack synclinorium.

The rocks were strongly metamorphosed and deformed during the Devonian Acadian orogeny.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Aggregates

Mineral List

30 valid minerals.

Rock Types Recorded

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

Habit: equant microcrystals

Colour: white

Description: Formed in the vein assemblages, composition An20-40.

References:

Ague, Jay J. (1995) Deep crustal growth of quartz, kyanite and garnet into large-aperture, fluid-filled fractures, north-eastern Connecticut, USA. Journal of Metamorphic Geology, 13 (2). 299-314

✪ 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.

References:

ⓘ 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.

References:

ⓘ Anorthite

Formula: Ca(Al₂Si₂O₈)

Habit: anhedral

Description: component of the host metagabbro, composition An70-80.

References:

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃A

References:

Ague, Jay J.; Eckert, James O. Jnr (2012) Precipitation of rutile and ilmenite needles in garnet: Implications for extreme metamorphic conditions in the Acadian Orogen, U.S.A. American Mineralogist, 97 (5). 840-855 doi:10.2138/am.2012.4015

ⓘ Baddeleyite

Formula: ZrO₂

References:

✪ '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.

References:

✪ 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.

References:

ⓘ Chalcopyrite

Formula: CuFeS₂

Description: A rarer accessory mineral in the vein assemblage.

References:

ⓘ 'Chlorite Group'

Colour: gray-green

Description: Very fine-grained alteration of primary minerals, with sericite and clays.

References:

Cristofono, Peter (n.d.) Personal communication.

ⓘ 'Clinopyroxene Subgroup'

Habit: anhedral

Colour: black

Description: A component of the host metagabbro.

References:

ⓘ Cordierite

Formula: Mg₂Al₄Si₅O₁₈

References:

ⓘ 'Crichtonite Group'

Formula: AD₂₁O₃₈ or A{DE₂G₆Ti₁₂}O₃₈

References:

ⓘ Cummingtonite

Formula: ◻Mg₂Mg₅(Si₈O₂₂)(OH)₂

Description: Metamorphic retrograde alteration of pyroxene.

References:

ⓘ Davidite-(Ce)

Formula: Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈

References:

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

Description: An uncommon mineral in the open vein assemblage.

References:

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

References:

ⓘ Goethite

Formula: Fe³⁺O(OH)

References:

Vandall KingIdentified by Vandall Thomas King: Visual Identification

ⓘ Graphite

Formula: C

References:

ⓘ 'Heulandite Subgroup'

Formula: (Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O

Habit: coffin-shaped

Colour: colorless

Description: Microcrystals in voids on a specimen if tourmaline crystals.

References:

Harold Moritz CollectionIdentified by Harold Moritz: Visual Identification

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

Description: An accessory mineral in the open vein assemblage. As inclusions in almandine.

References:

ⓘ 'K Feldspar'

References:

✪ 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.

References:

ⓘ Loveringite

Formula: (Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈

References:

✪ 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.

References:

✪ 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.

References:

✪ 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.

References:

ⓘ 'Monazite Group'

Formula: REE(PO₄)

References:

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

Habit: pseudo-hexagonal tabular

Colour: silvery to greenish

Description: Crystals in the open vein assemblage to about 1 cm.

References:

P Cristofono collection, 2008

ⓘ 'Orthopyroxene Subgroup'

Habit: anhedral

Description: A major component of the host metagabbro.

References:

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

References:

✪ Pyrite

Formula: FeS₂

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.

References:

P Cristofono collection, 2008

✪ Pyrrhotite

Formula: Fe_1-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.

References:

✪ Quartz

Formula: SiO₂

Habit: Tessin habit, scepters, reverse scepters

Colour: colorless to white, smoky

Description: A very common mineral in the open vein assemblage (and an accessory in the host metagabbro). 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}.

References:

Horowitz, Irving L. (2003) The Remarkable Quartz Crystals of West Willington, Tolland County, Connecticut. Rocks & Minerals, 78 (4). 257-261

✪ 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}.

References:

A very common mineral in the open vein assemblage (and an accessory in the host metagabbro). 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}.

ⓘ Rutile

Formula: TiO₂

Habit: elongated, striated prisms.

Colour: red

Description: An accessory mineral in the open vein assemblage, as microcrystals.

References:

P Cristofono collection, 2008

ⓘ Siderite

Formula: FeCO₃

Habit: rhombohedral

Description: As outer rims of a few analyzed magnesite crystals.

References:

ⓘ Sillimanite

Formula: Al₂(SiO₄)O

References:

ⓘ Spinel

Formula: MgAl₂O₄

References:

ⓘ Srilankite

Formula: TiO₂

References:

ⓘ Staurolite

Formula: Fe²⁺₂Al₉Si₄O₂₃(OH)

Description: A rare accessory in the open vein assemblage.

References:

ⓘ Titanite

Formula: CaTiO(SiO₄)

Colour: light brown

Description: A rare accessory mineral in the open vein assemblage.

References:

Cristofono, Peter (n.d.) Personal communication.

✪ '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.

References:

ⓘ 'Xenotime'

References:

ⓘ Zircon

Formula: Zr(SiO₄)

Description: A rare accessory mineral in the open vein assemblage.

References:

Gallery:

KAl₂(AlSi₃O₁₀)(OH)₂ⓘ Muscovite

Muscovite, etc.

Becker Quarry, Willington, Tolland County, Connecticut, USA

Muscovite, etc.

Becker Quarry, Willington, Tolland County, Connecticut, USA

Muscovite, etc.

Becker Quarry, Willington, Tolland County, Connecticut, USA

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Graphite	1.CB.05a	C
Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Goethite	4.00.	Fe³⁺O(OH)
ⓘ	Spinel	4.BB.05	MgAl₂O₄
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Davidite-(Ce)	4.CC.40	Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈
ⓘ	Loveringite	4.CC.40	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	var. Smoky Quartz	4.DA.05	SiO₂
ⓘ	Rutile	4.DB.05	TiO₂
ⓘ	Srilankite	4.DB.25	TiO₂
ⓘ	Baddeleyite	4.DE.35	ZrO₂
Group 5 - Nitrates and Carbonates
ⓘ	Magnesite var. Iron-bearing Magnesite	5.AB.05	(Mg,Fe)CO₃
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Magnesite	5.AB.05	MgCO₃
ⓘ	Siderite	5.AB.05	FeCO₃
ⓘ	Ankerite	5.AB.10	Ca(Fe²⁺,Mg)(CO₃)₂
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Almandine	9.AD.25	Fe²⁺₃Al₂(SiO₄)₃
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Sillimanite	9.AF.05	Al₂(SiO₄)O
ⓘ	Kyanite	9.AF.15	Al₂(SiO₄)O
ⓘ	Staurolite	9.AF.30	Fe²⁺₂Al₉Si₄O₂₃(OH)
ⓘ	Titanite	9.AG.15	CaTiO(SiO₄)
ⓘ	Cordierite	9.CJ.10	Mg₂Al₄Si₅O₁₈
ⓘ	Cummingtonite	9.DE.05	◻Mg₂Mg₅(Si₈O₂₂)(OH)₂
ⓘ	Magnesio-hornblende	9.DE.10	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Anorthite	9.FA.35	Ca(Al₂Si₂O₈)
Unclassified
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Chlorite Group'	-
ⓘ	'Heulandite Subgroup'	-	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
ⓘ	'Monazite Group'	-	REE(PO₄)
ⓘ	'Tourmaline'	-	AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z
ⓘ	'Xenotime'	-
ⓘ	'Clinopyroxene Subgroup'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'K Feldspar'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Orthopyroxene Subgroup'	-
ⓘ	'Crichtonite Group'	-	AD₂₁O₃₈ or A{DE₂G₆Ti₁₂}O₃₈
ⓘ	'Apatite'	-	Ca₅(PO₄)₃A

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Cummingtonite	◻Mg₂Mg₅(Si₈O₂₂)(OH)₂
H	ⓘ Davidite-(Ce)	Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈
H	ⓘ Goethite	Fe³⁺O(OH)
H	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
H	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Staurolite	Fe₂²⁺Al₉Si₄O₂₃(OH)
B	Boron
B	ⓘ Tourmaline	AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z
C	Carbon
C	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
C	ⓘ Magnesite var. Iron-bearing Magnesite	(Mg,Fe)CO₃
C	ⓘ Calcite	CaCO₃
C	ⓘ Graphite	C
C	ⓘ Magnesite	MgCO₃
C	ⓘ Siderite	FeCO₃
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
O	ⓘ Anorthite	Ca(Al₂Si₂O₈)
O	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
O	ⓘ Baddeleyite	ZrO₂
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Magnesite var. Iron-bearing Magnesite	(Mg,Fe)CO₃
O	ⓘ Calcite	CaCO₃
O	ⓘ Cordierite	Mg₂Al₄Si₅O₁₈
O	ⓘ Cummingtonite	◻Mg₂Mg₅(Si₈O₂₂)(OH)₂
O	ⓘ Davidite-(Ce)	Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Goethite	Fe³⁺O(OH)
O	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Kyanite	Al₂(SiO₄)O
O	ⓘ Loveringite	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈
O	ⓘ Magnesite	MgCO₃
O	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
O	ⓘ Monazite Group	REE(PO₄)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Rutile	TiO₂
O	ⓘ Siderite	FeCO₃
O	ⓘ Sillimanite	Al₂(SiO₄)O
O	ⓘ Quartz var. Smoky Quartz	SiO₂
O	ⓘ Spinel	MgAl₂O₄
O	ⓘ Srilankite	TiO₂
O	ⓘ Staurolite	Fe₂²⁺Al₉Si₄O₂₃(OH)
O	ⓘ Titanite	CaTiO(SiO₄)
O	ⓘ Tourmaline	AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z
O	ⓘ Zircon	Zr(SiO₄)
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Crichtonite Group	AD₂₁O₃₈ or A{DE₂G₆Ti₁₂}O₃₈
O	ⓘ Apatite	Ca₅(PO₄)₃A
F	Fluorine
F	ⓘ Biotite	K(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	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mg	ⓘ Magnesite var. Iron-bearing Magnesite	(Mg,Fe)CO₃
Mg	ⓘ Cordierite	Mg₂Al₄Si₅O₁₈
Mg	ⓘ Cummingtonite	◻Mg₂Mg₅(Si₈O₂₂)(OH)₂
Mg	ⓘ Loveringite	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈
Mg	ⓘ Magnesite	MgCO₃
Mg	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Mg	ⓘ Spinel	MgAl₂O₄
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Al	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Cordierite	Mg₂Al₄Si₅O₁₈
Al	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Al	ⓘ Kyanite	Al₂(SiO₄)O
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	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Sillimanite	Al₂(SiO₄)O
Al	ⓘ Spinel	MgAl₂O₄
Al	ⓘ Staurolite	Fe₂²⁺Al₉Si₄O₂₃(OH)
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Cordierite	Mg₂Al₄Si₅O₁₈
Si	ⓘ Cummingtonite	◻Mg₂Mg₅(Si₈O₂₂)(OH)₂
Si	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Si	ⓘ Kyanite	Al₂(SiO₄)O
Si	ⓘ Magnesio-hornblende	◻Ca₂(Mg₄Al)(Si₇Al)O₂₂(OH)₂
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Sillimanite	Al₂(SiO₄)O
Si	ⓘ Quartz var. Smoky Quartz	SiO₂
Si	ⓘ Staurolite	Fe₂²⁺Al₉Si₄O₂₃(OH)
Si	ⓘ Titanite	CaTiO(SiO₄)
Si	ⓘ Zircon	Zr(SiO₄)
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
P	ⓘ Monazite Group	REE(PO₄)
P	ⓘ Apatite	Ca₅(PO₄)₃A
S	Sulfur
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Pyrite	FeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
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	ⓘ Titanite	CaTiO(SiO₄)
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ca	ⓘ Apatite	Ca₅(PO₄)₃A
Ti	Titanium
Ti	ⓘ Biotite	K(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	ⓘ Ilmenite	Fe²⁺TiO₃
Ti	ⓘ Loveringite	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈
Ti	ⓘ Rutile	TiO₂
Ti	ⓘ Srilankite	TiO₂
Ti	ⓘ Titanite	CaTiO(SiO₄)
Ti	ⓘ Crichtonite Group	AD₂₁O₃₈ or A{DE₂G₆Ti₁₂}O₃₈
V	Vanadium
V	ⓘ Davidite-(Ce)	Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈
Cr	Chromium
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
Fe	Iron
Fe	ⓘ Ankerite	Ca(Fe²⁺,Mg)(CO₃)₂
Fe	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Magnesite var. Iron-bearing Magnesite	(Mg,Fe)CO₃
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Davidite-(Ce)	Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈
Fe	ⓘ Goethite	Fe³⁺O(OH)
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Loveringite	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Pyrrhotite	Fe_1-xS
Fe	ⓘ Siderite	FeCO₃
Fe	ⓘ Staurolite	Fe₂²⁺Al₉Si₄O₂₃(OH)
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Y	Yttrium
Y	ⓘ Davidite-(Ce)	Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈
Zr	Zirconium
Zr	ⓘ Baddeleyite	ZrO₂
Zr	ⓘ Loveringite	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈
Zr	ⓘ Zircon	Zr(SiO₄)
La	Lanthanum
La	ⓘ Loveringite	(Ca,Ce,La)(Zr,Fe)(Mg,Fe)₂(Ti,Fe,Cr,Al)₁₈O₃₈
Ce	Cerium
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
U	Uranium
U	ⓘ Davidite-(Ce)	Ce(Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH,F)₃₈

Other Regions, Features and Areas containing this locality

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North America PlateTectonic Plate

Ganderia DomainDomain
GranderiaPassive Margin

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References

Scovil, Jeffrey A. (1994) What's New in Minerals? - Rochester Mineralogical Symposium 1994. The Mineralogical Record, 25 (5) 377-380

Zagielski, M; Fast, J. (1994) A new occurrence of almandine, kyanite, and quartz in open veins in Willington, Connecticut. Rocks & Minerals, 69 (2). 136

Weber, Marcelle H., Sullivan, Earle C. (1995) Connecticut Mineral Locality Index. Rocks & Minerals, 70 (6) 396-409 doi:10.1080/00357529.1995.11761569p.407

Horowitz, Irving L. (2003) The Remarkable Quartz Crystals of West Willington, Tolland County, Connecticut. Rocks & Minerals, 78 (4). 257-261

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Becker Quarry, Willington, Tolland County, Connecticut, USAiRegional Level TypesBecker QuarryQuarry WillingtonTown Tolland CountyCounty ConnecticutState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Becker Quarry, Willington, Tolland County, Connecticut, USA i
Regional Level Types
Becker Quarry Quarry
Willington Town
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