Nathan Hall Quarry (Clark Hill Quarry), East Hampton (Chatham), Middlesex County, Connecticut, USAi
Regional Level Types | |
---|---|
Nathan Hall Quarry (Clark Hill Quarry) | Quarry |
East Hampton (Chatham) | Quarry |
Middlesex County | County |
Connecticut | State |
USA | Country |
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Latitude & Longitude (WGS84):
41° 35' 38'' North , 72° 32' 24'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Lake Pocotopaug | 3,436 (2017) | 2.5km |
East Hampton | 2,691 (2017) | 3.7km |
Terramuggus | 1,025 (2017) | 7.4km |
Portland | 5,862 (2017) | 8.7km |
Cromwell | 13,750 (2017) | 8.8km |
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 |
---|---|---|
Lapidary and Mineral Society of Central Connecticut | Meriden, Connecticut | 23km |
Bristol Gem & Mineral Club | Bristol, Connecticut | 35km |
New Haven Mineral Club | New Haven, Connecticut | 45km |
Mindat Locality ID:
29586
Long-form identifier:
mindat:1:2:29586:9
GUID (UUID V4):
2df61f42-b293-4e3a-aaf3-f95755ac96f6
The Nathan Hall Quarry (one of the quarries on Clark Hill) is located in the Meshomasic State Forest off of Woodchopper's Road. It is a small quarry in a zoned granite pegmatite and based on the few references, it appears to have operated completely before 1922. There is nothing specific in the mineralogical literature, but presumably it was quarried for feldspar and/or mica. The F. W. Beers County Atlas of Middlesex, Connecticut, published in 1874, shows a large rectangle of land north of Clark Hill Road owned by "N. Hall". The Hall Cemetery is on Clark Hill Road near the entrance to Woodchopper's Road. It is often incorrectly called the Nathan Hale Quarry (such as Schooner, circa 1980s) and is sometimes confused with the State Forest Quarry #1 just to the north.
Note: Collecting is allowed only via permit issued by the Connecticut DEEP to educational organizations (schools, mineral clubs, etc.). See link below.
Besides the rock-forming albite, microcline and quartz, sharp muscovite crystals are very common and the large, dark almandine garnets, although fairly rare, are noteworthy. XRF analyses of several garnets from Nathan Hall show them all to be almandine (>0.50 Fe/(Fe+Mn), but with a significant (0.23 to 0.47) spessartine component. As a result, black Mn oxy/hydroxide stains typical cover and surround these crystals but is not a reliable indicator of species. Annite (formerly known as "biotite") is also common, mostly in bladed crystals up to several feet long. Beryl is uncommon, but crystals can be large, gemmy, and terminated and vary in color from yellow through green to aqua. Zircon, uranium minerals (beautiful meta-autunite and metatorbernite halos around uranophane-altered uraninite), and fluorapatite are sprinkled throughout. There is schorl, plus interesting tapered to knobby pseudomorphs of muscovite after schorl. Schorl also occurs in the adjacent Littleton schist. Massive quartz, which encloses the sharp micas and matrix microclines, is very abundant at Hall, but good crystals are usually pocket micros. Although tiny columbite-(Fe) crystals are common, large ones are very rare but well-formed. Rare finds of loellingite, tantalite-(Fe), monazite-(Ce) and tapiolite-(Fe) crystals were confirmed by various analytical methods.
One mystery about this locality is the reported abundance of rose quartz by Foye (1922). Very little if any true rose quartz has been found here despite myriad field trips since the early 1990s (it is present at the nearby State Forest Quarry #1, which did not open until the early 1940s). One possible resolution is that the rose quartz is really from the small quarry in Cobalt along Great Hill Pond Brook that Hiller's 1971 collecting guide book calls the "Nathan Hale Quarry". The names Nathan Hale (the famous official State Hero) and Nathan Hall are commonly confused and Nathan Hall had several quarries, with the one in Cobalt thus possibly one if his also. This small quarry was described by Rice and Foye in their 1927 guide to Middletown area geology, though not given a name, nor did they mention rose quartz. However, Foye worked at Wesleyan University in Middletown and on display there at the Joe Webb Peoples Museum is a large specimen of rose quartz with the locality given as "Cobalt". It seems likely he may have confused the origin of the rose quartz (though the location of the Nathan Hall Quarry is correct in Foye (1922)), especially if Nathan Hall operated both quarries. Unfortunately, the quarry on Great Hill Pond Brook has been inaccessible for several decades.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
β Albite Formula: Na(AlSi3O8) Colour: white Description: Euhedral crystals restricted to the lining of small pockets. |
βͺ Almandine Formula: Fe2+3Al2(SiO4)3 Habit: complex mix of forms, generally modified trapezohedrons Colour: maroon Description: 7 specimens were tested for Fe and Mn content using X-ray fluorescence. The Mn percentage of the total Fe+Mn content varied from 23 to 47%, indicating there were all almandine. Crystals are typically coated with dark, probable Mn oxides coating, but this does not prove they are spessartine. |
β Annite Formula: KFe2+3(AlSi3O10)(OH)2 Habit: elongated tabular subhedral Colour: black Description: Crystals apparently reached several dm long as they are typically found as fragments in the dump, sometimes interlayered with muscovite. References: |
β Autunite Formula: Ca(UO2)2(PO4)2 · 10-12H2O References: |
β Beryl Formula: Be3Al2(Si6O18) Habit: elongated prisms with pinacoidal or somewhat rounded pyramidal terminations Colour: yellow, pale green, aqua Description: Crystals found frozen in fragments of the intermediate zone (quartz, albite, some muscovite) of the pegmatite. |
β Bismutite Formula: (BiO)2CO3 References: |
βͺ Columbite-(Fe) Formula: Fe2+Nb2O6 Habit: skeletal, tabular, stout or elongated prisms Colour: black with iridescence Description: Wide variety of crystal habits, stout prisms reach a about 3 x 5 cm, while skeletal crystals intergrown with albite can reach 8 cm. Several crystals tested using XRD and Raman spectroscopy. References: |
β Fluorapatite Formula: Ca5(PO4)3F Habit: anhedral to subhedral grains Colour: pale gray-green Fluorescence: yellow Description: subhedral grains can reach several cm References: |
β Formula: ◻(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) Habit: massive material, skeletal/interstitial in graphic granite Colour: black Description: Tested by Raman spectroscopy at the University of New Haven, spectrum was weak but consistent with foitite.
Thin masses interstitial within microcline/quartz graphic granite, unusual as that association is typically barren of interesting minerals.
Follow up: 2021 EDS analysis by Al Falster at Maine Mineral & Gem Museum indicates a member of the elbaite - schorl series. References: |
β Goethite Formula: Ξ±-Fe3+O(OH) References: |
β LΓΆllingite Formula: FeAs2 |
βͺ Meta-autunite Formula: Ca(UO2)2(PO4)2 · 6H2O Habit: encrustations Colour: yellow Fluorescence: green Description: excellent halos surrounding other uranium secondary minerals and altered uraninite. References: |
β Metatorbernite Formula: Cu(UO2)2(PO4)2 · 8H2O Habit: square tabular Colour: green Description: usually anhedral crusts and associated with other secondary U minerals References: |
β Microcline Formula: K(AlSi3O8) Habit: prismatic Colour: tan Description: rare in good crystals, some fragments found References: |
β Monazite-(Ce) Formula: Ce(PO4) Habit: tabular subhedral Colour: brown Description: One small glassy subhedral crystal found and confirmed by X-ray diffraction test. |
βͺ Muscovite Formula: KAl2(AlSi3O10)(OH)2 Habit: tabular, pseudo-hexagonal Colour: silver Description: Anhedral in the intermediate zone, but euhedral along the contact of this zone with the quartz core. Also as fine-grained pseudomorphs after euhedral schorl. |
β Opal Formula: SiO2 · nH2O Habit: encrustations Colour: colorless Fluorescence: green Description: inconspicuous unless illuminated by SW UV. References: |
β Opal var. Opal-AN Formula: SiO2 · nH2O Habit: encrustations Colour: colorless Fluorescence: green Description: inconspicuous unless illuminated by SW UV. References: |
β Quartz Formula: SiO2 Colour: clear, white |
β Quartz var. Ferruginous Quartz Formula: SiO2 References: |
β Quartz var. Rose Quartz Formula: SiO2 Colour: pink Description: Although reported by Foye (1922), no modern specimens found. Perhaps he was referring to the abundant ferruginous quartz. |
β Quartz var. Smoky Quartz Formula: SiO2 Colour: grey to black References: |
β Schorl Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) Habit: elongated prisms with shallow rhombohedral terminations Colour: black Description: generally anhedral to subhedral, crystals crumble readily. Euhedral crystals pseudomorphed by fine-grained muscovite are common. |
β Formula: Mn2+3Al2(SiO4)3 Description: As a component in almandine, not verified as a separate species. XRF testing of 7 garnets found Mn/(Fe+Mn) ranged from 0.23 to 0.47. Black Mn oxy/hydroxide staining associated with garnets is not a reliable indicator of spessartine as many garnets from here show such staining but have tested as almandine. |
β Staurolite Formula: Fe2+2Al9Si4O23(OH) References: |
βͺ Tantalite-(Fe) Formula: Fe2+Ta2O6 Habit: rectangular prismatic Colour: black with bluish iridescence Description: One columbite-tantalite crystal (https://www.mindat.org/photo-275489.html) suspected from its high SG of being tantalite was analyzed by SEM-EDS and found to be tantalite-(Fe). There may be more as each crystal would need to be tested to confirm and few have been. References: |
βͺ Tapiolite-(Fe) Formula: Fe2+Ta2O6 Habit: Complex, twinned short prisms or pyramidal tetragonal. Colour: black Description: Three specimens are known, with very similar with crystals about 3-4 cm, in quartz, albite and/or muscovite. Two are complexly crystallized apparently twinned, that somewhat resemble garnets, but of course black and submetallic. Other than one specimen from the Hale Quarry, this is the only known Connecticut location for this mineral. An additional three specimens were collected in the 1980's by David Busha but remained unidentified until 2019. |
β Torbernite Formula: Cu(UO2)2(PO4)2 · 12H2O |
β Uraninite Formula: UO2 Habit: octahedral Colour: black Description: Typically highly altered and surrounded by secondary U mineral haloes. |
β Uranophane Formula: Ca(UO2)2(SiO3OH)2 · 5H2O Colour: yellow Description: Usually replacing small uraninite crystals. |
β 'Yttrocolumbite-(Y)' ? Formula: Y(U4+,Fe2+)Nb2O8 Description: Extremely rare mineral. No chemical data available. |
β Zircon Formula: Zr(SiO4) Habit: radiating aggregates Colour: brown Description: Usually small, inconspicuous brown radiating aggregates, often stained with limonite. References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | LΓΆllingite | 2.EB.15a | FeAs2 |
Group 4 - Oxides and Hydroxides | |||
β | Goethite | 4.00. | Ξ±-Fe3+O(OH) |
β | Quartz var. Ferruginous Quartz | 4.DA.05 | SiO2 |
β | var. Smoky Quartz | 4.DA.05 | SiO2 |
β | var. Rose Quartz | 4.DA.05 | SiO2 |
β | 4.DA.05 | SiO2 | |
β | Opal | 4.DA.10 | SiO2 Β· nH2O |
β | var. Opal-AN | 4.DA.10 | SiO2 Β· nH2O |
β | Tapiolite-(Fe) | 4.DB.10 | Fe2+Ta2O6 |
β | 'Yttrocolumbite-(Y)' ? | 4.DB.25 | Y(U4+,Fe2+)Nb2O8 |
β | Tantalite-(Fe) | 4.DB.35 | Fe2+Ta2O6 |
β | Columbite-(Fe) | 4.DB.35 | Fe2+Nb2O6 |
β | Uraninite | 4.DL.05 | UO2 |
Group 5 - Nitrates and Carbonates | |||
β | Bismutite | 5.BE.25 | (BiO)2CO3 |
Group 8 - Phosphates, Arsenates and Vanadates | |||
β | Monazite-(Ce) | 8.AD.50 | Ce(PO4) |
β | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
β | Torbernite | 8.EB.05 | Cu(UO2)2(PO4)2 Β· 12H2O |
β | Autunite | 8.EB.05 | Ca(UO2)2(PO4)2 Β· 10-12H2O |
β | Metatorbernite | 8.EB.10 | Cu(UO2)2(PO4)2 Β· 8H2O |
β | Meta-autunite | 8.EB.10 | Ca(UO2)2(PO4)2 Β· 6H2O |
Group 9 - Silicates | |||
β | Almandine | 9.AD.25 | Fe2+3Al2(SiO4)3 |
β | Spessartine ? | 9.AD.25 | Mn2+3Al2(SiO4)3 |
β | Zircon | 9.AD.30 | Zr(SiO4) |
β | Staurolite | 9.AF.30 | Fe2+2Al9Si4O23(OH) |
β | Uranophane | 9.AK.15 | Ca(UO2)2(SiO3OH)2 Β· 5H2O |
β | Beryl | 9.CJ.05 | Be3Al2(Si6O18) |
β | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
β | Foitite ? | 9.CK.05 | β»(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
β | Annite | 9.EC.20 | KFe2+3(AlSi3O10)(OH)2 |
β | Microcline | 9.FA.30 | K(AlSi3O8) |
β | Albite | 9.FA.35 | Na(AlSi3O8) |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Annite | KFe32+(AlSi3O10)(OH)2 |
H | β Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
H | β Foitite | ◻(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
H | β Goethite | Ξ±-Fe3+O(OH) |
H | β Opal var. Opal-AN | SiO2 · nH2O |
H | β Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
H | β Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
H | β Opal | SiO2 · nH2O |
H | β Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
H | β Staurolite | Fe22+Al9Si4O23(OH) |
H | β Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
H | β Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
Be | Beryllium | |
Be | β Beryl | Be3Al2(Si6O18) |
B | Boron | |
B | β Foitite | ◻(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
B | β Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
C | Carbon | |
C | β Bismutite | (BiO)2CO3 |
O | Oxygen | |
O | β Albite | Na(AlSi3O8) |
O | β Annite | KFe32+(AlSi3O10)(OH)2 |
O | β Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
O | β Almandine | Fe32+Al2(SiO4)3 |
O | β Bismutite | (BiO)2CO3 |
O | β Beryl | Be3Al2(Si6O18) |
O | β Columbite-(Fe) | Fe2+Nb2O6 |
O | β Tantalite-(Fe) | Fe2+Ta2O6 |
O | β Tapiolite-(Fe) | Fe2+Ta2O6 |
O | β Fluorapatite | Ca5(PO4)3F |
O | β Foitite | ◻(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
O | β Goethite | Ξ±-Fe3+O(OH) |
O | β Opal var. Opal-AN | SiO2 · nH2O |
O | β Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
O | β Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
O | β Microcline | K(AlSi3O8) |
O | β Monazite-(Ce) | Ce(PO4) |
O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
O | β Opal | SiO2 · nH2O |
O | β Quartz | SiO2 |
O | β Quartz var. Rose Quartz | SiO2 |
O | β Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
O | β Quartz var. Smoky Quartz | SiO2 |
O | β Spessartine | Mn32+Al2(SiO4)3 |
O | β Staurolite | Fe22+Al9Si4O23(OH) |
O | β Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
O | β Uraninite | UO2 |
O | β Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
O | β Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
O | β Zircon | Zr(SiO4) |
O | β Quartz var. Ferruginous Quartz | SiO2 |
F | Fluorine | |
F | β Fluorapatite | Ca5(PO4)3F |
Na | Sodium | |
Na | β Albite | Na(AlSi3O8) |
Na | β Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
Al | Aluminium | |
Al | β Albite | Na(AlSi3O8) |
Al | β Annite | KFe32+(AlSi3O10)(OH)2 |
Al | β Almandine | Fe32+Al2(SiO4)3 |
Al | β Beryl | Be3Al2(Si6O18) |
Al | β Foitite | ◻(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
Al | β Microcline | K(AlSi3O8) |
Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | β Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
Al | β Spessartine | Mn32+Al2(SiO4)3 |
Al | β Staurolite | Fe22+Al9Si4O23(OH) |
Si | Silicon | |
Si | β Albite | Na(AlSi3O8) |
Si | β Annite | KFe32+(AlSi3O10)(OH)2 |
Si | β Almandine | Fe32+Al2(SiO4)3 |
Si | β Beryl | Be3Al2(Si6O18) |
Si | β Foitite | ◻(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
Si | β Opal var. Opal-AN | SiO2 · nH2O |
Si | β Microcline | K(AlSi3O8) |
Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | β Opal | SiO2 · nH2O |
Si | β Quartz | SiO2 |
Si | β Quartz var. Rose Quartz | SiO2 |
Si | β Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
Si | β Quartz var. Smoky Quartz | SiO2 |
Si | β Spessartine | Mn32+Al2(SiO4)3 |
Si | β Staurolite | Fe22+Al9Si4O23(OH) |
Si | β Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
Si | β Zircon | Zr(SiO4) |
Si | β Quartz var. Ferruginous Quartz | SiO2 |
P | Phosphorus | |
P | β Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
P | β Fluorapatite | Ca5(PO4)3F |
P | β Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
P | β Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
P | β Monazite-(Ce) | Ce(PO4) |
P | β Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
K | Potassium | |
K | β Annite | KFe32+(AlSi3O10)(OH)2 |
K | β Microcline | K(AlSi3O8) |
K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Ca | Calcium | |
Ca | β Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
Ca | β Fluorapatite | Ca5(PO4)3F |
Ca | β Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
Ca | β Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
Mn | Manganese | |
Mn | β Spessartine | Mn32+Al2(SiO4)3 |
Fe | Iron | |
Fe | β Annite | KFe32+(AlSi3O10)(OH)2 |
Fe | β Almandine | Fe32+Al2(SiO4)3 |
Fe | β Columbite-(Fe) | Fe2+Nb2O6 |
Fe | β Tantalite-(Fe) | Fe2+Ta2O6 |
Fe | β Tapiolite-(Fe) | Fe2+Ta2O6 |
Fe | β Foitite | ◻(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
Fe | β Goethite | Ξ±-Fe3+O(OH) |
Fe | β LΓΆllingite | FeAs2 |
Fe | β Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
Fe | β Staurolite | Fe22+Al9Si4O23(OH) |
Fe | β Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
Cu | Copper | |
Cu | β Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
Cu | β Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
As | Arsenic | |
As | β LΓΆllingite | FeAs2 |
Y | Yttrium | |
Y | β Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
Zr | Zirconium | |
Zr | β Zircon | Zr(SiO4) |
Nb | Niobium | |
Nb | β Columbite-(Fe) | Fe2+Nb2O6 |
Nb | β Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
Ce | Cerium | |
Ce | β Monazite-(Ce) | Ce(PO4) |
Ta | Tantalum | |
Ta | β Tantalite-(Fe) | Fe2+Ta2O6 |
Ta | β Tapiolite-(Fe) | Fe2+Ta2O6 |
Bi | Bismuth | |
Bi | β Bismutite | (BiO)2CO3 |
U | Uranium | |
U | β Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
U | β Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
U | β Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
U | β Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
U | β Uraninite | UO2 |
U | β Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
U | β Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Ganderia DomainDomain
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