Becker Quarry (Becker's Quarry), West Willington, Willington, Tolland County, Connecticut, USAi
Regional Level Types | |
---|---|
Becker Quarry (Becker's Quarry) | Quarry |
West Willington | Village |
Willington | Town |
Tolland County | County |
Connecticut | State |
USA | Country |
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Latitude & Longitude (WGS84):
41° 52' 19'' North , 72° 16' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
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
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):
2f130a59-4a31-4e0b-a291-f19d6562dc46
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.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
22 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
ⓘ Albite Formula: Na(AlSi3O8) Habit: equant microcrystals Colour: white Description: Formed in the vein assemblages, composition An20-40. |
✪ 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. |
ⓘ 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. |
ⓘ Anorthite Formula: Ca(Al2Si2O8) Habit: anhedral Description: component of the host metagabbro, composition An70-80. |
✪ '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. |
✪ 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. |
ⓘ Chalcopyrite Formula: CuFeS2 Description: A rarer accessory mineral in the vein assemblage. |
ⓘ 'Chlorite Group' Colour: gray-green Description: Very fine-grained alteration of primary minerals, with sericite and clays. |
ⓘ 'Clinopyroxene Subgroup' Habit: anhedral Colour: black Description: A component of the host metagabbro. |
ⓘ Cummingtonite Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2 Description: Metamorphic retrograde alteration of pyroxene. |
ⓘ Fluorapatite Formula: Ca5(PO4)3F Description: An uncommon mineral in the open vein assemblage. |
ⓘ Goethite Formula: α-Fe3+O(OH) References: Vandall KingIdentified by Vandall Thomas King: Visual Identification |
ⓘ Ilmenite Formula: Fe2+TiO3 Description: An accessory mineral in the open vein assemblage. As inclusions in almandine. |
✪ 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. |
✪ 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. |
ⓘ 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. |
ⓘ 'Orthopyroxene Subgroup' Habit: anhedral Description: A major component of the host metagabbro. |
✪ 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. |
✪ 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 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: |
✪ 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}. |
ⓘ Rutile Formula: TiO2 Habit: elongated, striated prisms. Colour: red Description: An accessory mineral in the open vein assemblage, as microcrystals. References: |
ⓘ Siderite Formula: FeCO3 Habit: rhombohedral Description: As outer rims of a few analyzed magnesite crystals. |
ⓘ Staurolite Formula: Fe2+2Al9Si4O23(OH) Description: A rare accessory in the open vein assemblage. |
ⓘ Titanite Formula: CaTi(SiO4)O Colour: light brown Description: A rare accessory mineral in the open vein assemblage. References: |
✪ '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. |
ⓘ 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 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Goethite | 4.00. | α-Fe3+O(OH) |
ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
ⓘ | Quartz var. Smoky Quartz | 4.DA.05 | SiO2 |
ⓘ | 4.DA.05 | SiO2 | |
ⓘ | Rutile | 4.DB.05 | TiO2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Magnesite | 5.AB.05 | MgCO3 |
ⓘ | var. Iron-bearing Magnesite | 5.AB.05 | (Mg,Fe)CO3 |
ⓘ | Calcite | 5.AB.05 | CaCO3 |
ⓘ | 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) |
ⓘ | Kyanite | 9.AF.15 | Al2(SiO4)O |
ⓘ | Staurolite | 9.AF.30 | Fe2+2Al9Si4O23(OH) |
ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
ⓘ | Cummingtonite | 9.DE.05 | ◻{Mg2}{Mg5}(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 | |||
ⓘ | 'Chlorite Group' | - | |
ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
ⓘ | 'Clinopyroxene Subgroup' | - | |
ⓘ | 'Orthopyroxene Subgroup' | - |
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 | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
H | ⓘ Goethite | α-Fe3+O(OH) |
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 | ⓘ 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 | ⓘ 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 | ⓘ Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
O | ⓘ Fluorapatite | Ca5(PO4)3F |
O | ⓘ Goethite | α-Fe3+O(OH) |
O | ⓘ Ilmenite | Fe2+TiO3 |
O | ⓘ Kyanite | Al2(SiO4)O |
O | ⓘ Magnesite | MgCO3 |
O | ⓘ Magnesio-hornblende | ◻Ca2(Mg4Al)(Si7Al)O22(OH)2 |
O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
O | ⓘ Quartz | SiO2 |
O | ⓘ Rutile | TiO2 |
O | ⓘ Siderite | FeCO3 |
O | ⓘ Quartz var. Smoky Quartz | SiO2 |
O | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
O | ⓘ Titanite | CaTi(SiO4)O |
O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
O | ⓘ Zircon | Zr(SiO4) |
F | Fluorine | |
F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
F | ⓘ Fluorapatite | Ca5(PO4)3F |
Na | Sodium | |
Na | ⓘ Albite | Na(AlSi3O8) |
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 | ⓘ Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
Mg | ⓘ Magnesite | MgCO3 |
Mg | ⓘ Magnesio-hornblende | ◻Ca2(Mg4Al)(Si7Al)O22(OH)2 |
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 | ⓘ Kyanite | Al2(SiO4)O |
Al | ⓘ Magnesio-hornblende | ◻Ca2(Mg4Al)(Si7Al)O22(OH)2 |
Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
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 | ⓘ Cummingtonite | ◻{Mg2}{Mg5}(Si8O22)(OH)2 |
Si | ⓘ Kyanite | Al2(SiO4)O |
Si | ⓘ Magnesio-hornblende | ◻Ca2(Mg4Al)(Si7Al)O22(OH)2 |
Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Quartz var. Smoky Quartz | SiO2 |
Si | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Si | ⓘ Titanite | CaTi(SiO4)O |
Si | ⓘ Zircon | Zr(SiO4) |
P | Phosphorus | |
P | ⓘ Fluorapatite | Ca5(PO4)3F |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Pyrite | FeS2 |
S | ⓘ Pyrrhotite | Fe1-xS |
K | Potassium | |
K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
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 | ⓘ Magnesio-hornblende | ◻Ca2(Mg4Al)(Si7Al)O22(OH)2 |
Ca | ⓘ Titanite | CaTi(SiO4)O |
Ti | Titanium | |
Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Ti | ⓘ Ilmenite | Fe2+TiO3 |
Ti | ⓘ Rutile | TiO2 |
Ti | ⓘ Titanite | CaTi(SiO4)O |
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 | ⓘ Goethite | α-Fe3+O(OH) |
Fe | ⓘ Ilmenite | Fe2+TiO3 |
Fe | ⓘ Pyrite | FeS2 |
Fe | ⓘ Pyrrhotite | Fe1-xS |
Fe | ⓘ Siderite | FeCO3 |
Fe | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Zr | Zirconium | |
Zr | ⓘ Zircon | Zr(SiO4) |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Ganderia DomainDomain
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