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Eureka Quarries, South Glastonbury, Glastonbury, Hartford County, Connecticut, USAi
Regional Level Types
Eureka QuarriesGroup of Quarries
South GlastonburyVillage
GlastonburyTown
Hartford CountyCounty
ConnecticutState
USACountry

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Latitude & Longitude (WGS84):
41° 38' 42'' North , 72° 36' 4'' West
Latitude & Longitude (decimal):
41.64501,-72.60124
GeoHash:
G#: drkkgvjru
GRN:
N28W40
Type:
Group of Quarries
KΓΆppen climate type:
Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Glastonbury Center7,387 (2017)6.2km
Cromwell13,750 (2017)6.6km
Glastonbury31,876 (2017)7.5km
Portland5,862 (2017)8.7km
Wethersfield26,668 (2017)8.8km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut21km
Bristol Gem & Mineral ClubBristol, Connecticut29km
New Haven Mineral ClubNew Haven, Connecticut46km
Mindat Locality ID:
209534
Long-form identifier:
mindat:1:2:209534:2
GUID (UUID V4):
704735ab-401b-4e6d-b9f1-2132163ae2d7


A series of 4 adjacent quarries in granite pegmatite on the immediate north side of the gas pipeline right-of-way leading east from the end of Raymond Road. A brief description of quarries referred to as "Old Eureka Quarries" by Watts (1916) and "Located just north of the Howe [#3] quarry" strongly suggest their identity with this string of quarries. Betts (1999) called them P2 to P4 and P50, noting that Stugard (1958) labeled one of them Howe #4 Quarry. There are extensive dumps (Betts (1999) estimated 20,000 tons for P2 and P3 each) leading 100 feet downslope to the west and near the path, held within neat retaining walls.

This description by Bastin (1910) appears to match the characteristics and location of these otherwise rarely mentioned quarries:

Two quarries formerly worked by the Eureka Mining and Operating Company but not operated at the time of the writer’s visit, in November, 1907, are located in the town of Glastonbury, about one-half mile north of the Howe quarry, described below. These consist of two pits on a western hill slope lying about 100 feet apart on a north-south line. The southernmost one is 100 feet by 40 feet in horizontal dimensions and 30 feet in maximum depth. The rock is granite pegmatite, similar to that quarried at the Howe quarry. A considerable amount of feldspar was piled in stock piles at these quarries at the time of the writer’s visit, and there still appears to be an important amount of material of pottery grade available.


These quarries all worked the same pegmatite so the mineralogy is combined. Coordinates are for the largest quarry, the second from the south. See sublocalities for their exact locations.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

11 valid minerals.

Detailed Mineral List:

β“˜ Albite
Formula: Na(AlSi3O8)
References:
Field observations
β“˜ Almandine
Formula: Fe2+3Al2(SiO4)3
Description: Listed on Table 1 of Betts (1999) with a question mark but since confirmed by new samples.
β“˜ Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Description: Accessory in the pegmatite.
β“˜ Beryl
Formula: Be3Al2(Si6O18)
Habit: crude hexagonal prisms
Colour: pale yellow-green
Description: generally not well-formed or highly colored crystals, up to a few inches
β“˜ 'Columbite-(Fe)-Columbite-(Mn) Series' ?
Description: Listed on Table 1 of Betts (1999) with a question mark.
β“˜ Fluorapatite ?
Formula: Ca5(PO4)3F
Description: Common accessory in pegmatites, but listed in Table 1 of Betts (1999) with a question mark.
β“˜ Microcline
Formula: K(AlSi3O8)
References:
Field observations
β“˜ Monazite-(Ce)
Formula: Ce(PO4)
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
References:
Field observations
β“˜ Opal
Formula: SiO2 · nH2O
Habit: massive
Colour: colorless
Fluorescence: green
Description: Thin coatings on pegmatite matrix invisible except under SW UV.
β“˜ Opal var. Opal-AN
Formula: SiO2 · nH2O
Habit: massive
Colour: colorless
Fluorescence: green
Description: Thin coatings on pegmatite matrix invisible except under SW UV.
β“˜ Quartz
Formula: SiO2
References:
Field observations
β“˜ Quartz var. Smoky Quartz
Formula: SiO2
β“˜ Schorl ?
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
Description: Common accessory, but listed on Table 1 of Betts (1999) with a question mark.

Gallery:

Be3Al2(Si6O18)β“˜ Beryl

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Quartz
var. Smoky Quartz		4.DA.05SiO2
β“˜4.DA.05SiO2
β“˜Opal
var. Opal-AN		4.DA.10SiO2 Β· nH2O
β“˜4.DA.10SiO2 Β· nH2O
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Monazite-(Ce)8.AD.50Ce(PO4)
β“˜Fluorapatite ?8.BN.05Ca5(PO4)3F
Group 9 - Silicates
β“˜Almandine9.AD.25Fe2+3Al2(SiO4)3
β“˜Beryl9.CJ.05Be3Al2(Si6O18)
β“˜Schorl ?9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Annite9.EC.20KFe2+3(AlSi3O10)(OH)2
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Albite9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Columbite-(Fe)-Columbite-(Mn) Series' ?-

List of minerals for each chemical element

HHydrogen
Hβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Hβ“˜ Opal var. Opal-ANSiO2 · nH2O
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ OpalSiO2 · nH2O
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
BeBeryllium
Beβ“˜ BerylBe3Al2(Si6O18)
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Oβ“˜ AlmandineFe32+Al2(SiO4)3
Oβ“˜ BerylBe3Al2(Si6O18)
Oβ“˜ FluorapatiteCa5(PO4)3F
Oβ“˜ Opal var. Opal-ANSiO2 · nH2O
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ Monazite-(Ce)Ce(PO4)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ OpalSiO2 · nH2O
Oβ“˜ QuartzSiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ Quartz var. Smoky QuartzSiO2
FFluorine
Fβ“˜ FluorapatiteCa5(PO4)3F
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Alβ“˜ AlmandineFe32+Al2(SiO4)3
Alβ“˜ BerylBe3Al2(Si6O18)
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Siβ“˜ AlmandineFe32+Al2(SiO4)3
Siβ“˜ BerylBe3Al2(Si6O18)
Siβ“˜ Opal var. Opal-ANSiO2 · nH2O
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ OpalSiO2 · nH2O
Siβ“˜ QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ Quartz var. Smoky QuartzSiO2
PPhosphorus
Pβ“˜ FluorapatiteCa5(PO4)3F
Pβ“˜ Monazite-(Ce)Ce(PO4)
KPotassium
Kβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ FluorapatiteCa5(PO4)3F
FeIron
Feβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Feβ“˜ AlmandineFe32+Al2(SiO4)3
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CeCerium
Ceβ“˜ Monazite-(Ce)Ce(PO4)

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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References

Bastin, Edson S. (1910) Economic Geology of the Feldspar Deposits of the United States. USGS Bulletin 420.
Watts, A. S. (1916) The Feldspars of the New England and North Appalachian States. US Bureau of Mines Bulletin 92.
Stugard, Frederick, Jr. (1958) PEGMATITES OF THE MIDDLETOWN AREA, CONNECTICUT. USGS Bulletin 1042-Q.
Betts, John. (1996) The Quarries and Minerals of South Glastonbury, Connecticut. George F. Kunz Competition Papers 1996. New York Mineralogical Club.
Betts, John. (1999) The Quarries and Minerals of the Dayton Road District, South Glastonbury, Connecticut. Rocks & Minerals: 74(2): 110-121.
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