SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Rockside Quarry (Mine Hill Quarry), Mine Hill (Ore Hill), Roxbury, Litchfield Co., Connecticut, USAi
Regional Level Types
Rockside Quarry (Mine Hill Quarry)Quarry
Mine Hill (Ore Hill)Hill
Roxbury- not defined -
Litchfield Co.County
ConnecticutState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
Key
Lock Map
Latitude & Longitude (WGS84): 41° 34' 14'' North , 73° 20' 16'' West
Latitude & Longitude (decimal): 41.57083,-73.33778
GeoHash:G#: dr7u7ptp9
Locality type:Quarry
Köppen climate type:Dfb : Warm-summer humid continental climate


Situated at the eastern base of Mine Hill and now part of the Roxbury Land Trust Mine Hill Preserve, it is separate from the "upper quarry" which is on the hill to the southwest. According to Dale and Gregory (1911) this dimension stone quarry began operations in 1890, though Pawloski (2006) mentions quarrying as early as 1837. It closed in 1935, but was briefly re-opened in 1952 by Charles Showalter, who moved his operations to the upper quarry. Bell and Mayerfeld (1982) mapped the area and show that one of the numerous siderite-rich veins found on the hill intersects the quarry. Dale and Gregory (1911) describe it thus:

"Within the second heading from the south end is a mineral vein up to 8 inches thick, which tapers out horizontally at a point 200 feet from the east side of the quarry. It contains pyrite, chalcopyrite, siderite, galenite, and secondary quartz coating crystals of siderite. Similar veins occur in the first and third headings. These are evidently all related to the larger siderite vein which was formerly mined on the hill and to which it owes its name."

The minerals listed are either from the veins or are rock forming or accessory minerals in the gneiss.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


24 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Habit: anhedral
Colour: white
Description: reported as oligoclase to oligoclase-andesine
Reference: Dale and Gregory (1911)
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Anatase
Formula: TiO2
Colour: indigo-blue
Description: As indigo-blue microcrystals embedded in calcite; associated with: quartz, tourmaline, and muscovite.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.277
'Biotite'
Habit: anhedral
Colour: black
Description: rock-forming mineral
Reference: Dale and Gregory (1911)
Bismuth
Formula: Bi
Habit: grains
Colour: silver-white with pinkish tinge
Description: Tiny grain-like masses, silver-white in color with a characteristic pinkish tinge; embedded in quartz. (x-rayed) (Januzzi, 1976, 1994)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.277
Bismuthinite
Formula: Bi2S3
Habit: acicular, capillary
Description: Occurs as tiny slender prismatic crystals and capillary inclusions (hair-like crystals) in quartz intimately associated with bismutite an alteration product of primary bismuth minerals.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.277
Bismutite
Formula: (BiO)2CO3
Habit: pseudomorphous after bismuthinite
Colour: grayish black
Description: Occurs as fine grained grayish black pseudomorphs after bismuthinite
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.277
Brookite ?
Formula: TiO2
Habit: tabular, rectangular, "lathshaped"
Colour: very pale straw yellow, hair brown
Description: hair-brown lathshaped crystals intimately associated with anatase; occurs in veins of the Alpine type. (Januzzi 1976, p. 277)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p. 212, 277.; Januzzi (1994): Mineral Data Book
Calcite
Formula: CaCO3
Habit: anhedral
Description: A secondary mineral in the granite gneiss.
Reference: Dale and Gregory (1911)
Chalcopyrite
Formula: CuFeS2
Description: In veins in the gneiss associated with pyrite, siderite, galena, quartz.
Reference: Dale and Gregory (1911)
Copiapite
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Habit: encrustaion
Colour: yellow
Description: In a quartz vein at the north end of the quarry yellow copiapite is forming through the alteration of pyrite.
Reference: Schooner (1961) Mineralogy of Connecticut.
Fluorapatite
Formula: Ca5(PO4)3F
Description: Accessory mineral in the granite gneiss.
Reference: Dale and Gregory (1911)
Fluorite
Formula: CaF2
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Galena
Formula: PbS
Description: In veins in the gneiss associated with pyrite, siderite, chalcopyrite, quartz.
Reference: Dale and Gregory (1911)
Kaolinite
Formula: Al2(Si2O5)(OH)4
Description: A secondary mineral in the granite gneiss.
Reference: Dale and Gregory (1911)
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Microcline
Formula: K(AlSi3O8)
Habit: anhedral
Description: A constituent of the granite gneiss.
Reference: Dale and Gregory (1911)
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: anhedral
Description: As a constituent of the gneiss.
Reference: Dale and Gregory (1911)
Orthoclase
Formula: K(AlSi3O8)
Habit: anhedral
Description: As a constituent of the gneiss.
Reference: Dale and Gregory (1911)
Pyrite
Formula: FeS2
Description: In veins in the gneiss associated with chalcopyrite, siderite, galena, quartz.
Reference: Dale and Gregory (1911)
Quartz
Formula: SiO2
Description: In veins in the gneiss associated with pyrite, siderite, galena, chalcopyrite. Also as an constituent of the granite gneiss
Reference: Dale and Gregory (1911)
Quartz var: Amethyst
Formula: SiO2
Habit: scepter overgrowths
Colour: pale purple
Description: Lightly colored scepter overgrowths in faulted gneiss.
Reference: Dale and Gregory (1911); Former Ed Force collection.
Quartz var: Smoky Quartz
Formula: SiO2
Habit: anhedral
Colour: smoky
Description: As a constituent of the gneiss and in numerous small veins.
Reference: Dale and Gregory (1911)
Rutile
Formula: TiO2
Habit: geniculated and cyclic twins
Colour: Dark greenish-yellow
Description: As micro-twinned crystals- both geniculated and cyclic twinning has been noted; associated with quartz and siderite. (x-rayed)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State; Januzzi (1994) Mineral Data Book.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Siderite
Formula: FeCO3
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
Sphalerite
Formula: ZnS
Habit: anhedral
Description: Seams containing sphalerite have been seen in the gneiss of the quarry.
Reference: Januzzi, 1976. Mineral Localities of CT and Southeastern NY State; Januzzi (1994) Mineral Data Book
Zircon
Formula: Zr(SiO4)
Description: As a accessory constituent of the gneiss.
Reference: Dale and Gregory (1911)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Bismuth1.CA.05Bi
Group 2 - Sulphides and Sulfosalts
Bismuthinite2.DB.05Bi2S3
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Anatase4.DD.05TiO2
Brookite ?4.DD.10TiO2
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Bismutite5.BE.25(BiO)2CO3
Calcite5.AB.05CaCO3
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Copiapite7.DB.35Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
'Almandine'9.AD.25Fe2+3Al2(SiO4)3
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
Biotite-
Limonite-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Bismuth1.3.1.4Bi
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Bismuthinite2.11.2.3Bi2S3
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Anatase4.4.4.1TiO2
Brookite ?4.4.5.1TiO2
Rutile4.4.1.1TiO2
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Siderite14.1.1.3FeCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Bismutite16a.3.5.1(BiO)2CO3
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
Miscellaneous
Copiapite31.10.5.1Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Biotite'-
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)
Quartz
var: Amethyst
-SiO2
var: Smoky Quartz-SiO2

List of minerals for each chemical element

HHydrogen
H CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
H KaoliniteAl2(Si2O5)(OH)4
H Limonite(Fe,O,OH,H2O)
H MuscoviteKAl2(AlSi3O10)(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C Bismutite(BiO)2CO3
C CalciteCaCO3
C SideriteFeCO3
OOxygen
O AlbiteNa(AlSi3O8)
O AlmandineFe32+Al2(SiO4)3
O Quartz (var: Amethyst)SiO2
O AnataseTiO2
O Bismutite(BiO)2CO3
O BrookiteTiO2
O CalciteCaCO3
O CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
O FluorapatiteCa5(PO4)3F
O KaoliniteAl2(Si2O5)(OH)4
O Limonite(Fe,O,OH,H2O)
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O RutileTiO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O SideriteFeCO3
O Quartz (var: Smoky Quartz)SiO2
O ZirconZr(SiO4)
FFluorine
F FluorapatiteCa5(PO4)3F
F FluoriteCaF2
NaSodium
Na AlbiteNa(AlSi3O8)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AlmandineFe32+Al2(SiO4)3
Al KaoliniteAl2(Si2O5)(OH)4
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
SiSilicon
Si AlbiteNa(AlSi3O8)
Si AlmandineFe32+Al2(SiO4)3
Si Quartz (var: Amethyst)SiO2
Si KaoliniteAl2(Si2O5)(OH)4
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Quartz (var: Smoky Quartz)SiO2
Si ZirconZr(SiO4)
PPhosphorus
P FluorapatiteCa5(PO4)3F
SSulfur
S BismuthiniteBi2S3
S ChalcopyriteCuFeS2
S CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
S GalenaPbS
S PyriteFeS2
S SphaleriteZnS
KPotassium
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca CalciteCaCO3
Ca FluorapatiteCa5(PO4)3F
Ca FluoriteCaF2
TiTitanium
Ti AnataseTiO2
Ti BrookiteTiO2
Ti RutileTiO2
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe ChalcopyriteCuFeS2
Fe CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe SideriteFeCO3
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
ZrZirconium
Zr ZirconZr(SiO4)
PbLead
Pb GalenaPbS
BiBismuth
Bi BismuthBi
Bi BismuthiniteBi2S3
Bi Bismutite(BiO)2CO3

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Eifelian - Lochkovian
387.7 - 419.2 Ma



ID: 2961666
Ordovician? granitic gneiss

Age: Devonian (387.7 - 419.2 Ma)

Description: (Including local terms Ansonia, Mine Hill, "Tyler Lake," "Siscowit") - White, light-gray, buff, or pink, generally foliated granitic gneiss, composed of sodic plagioclase, quartz, microcline, muscovite, and biotite, and locally garnet or sillimanite. Commonly contains numerous inclusions or layers of mica schist and gneiss.

Comments: Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Ansonia Gneiss is here referred to as Ansonia leucogranite. On the basis of field and laboratory studies, Ansonia, Beardsley, Pumpkin Ground, and Shelton gneisses, previously considered stratigraphic units, are reinterpreted as plutonic. Ansonia is described as a strongly lineated and moderately foliated, fine-grained, garnet-bearing, biotite-muscovite leucogranite with a well-developed granoblastic texture. Intrudes Beardsley and Pumpkin Ground orthogneisses. Maximum age from zircons is 417+/-1.5 Ma. Conservative interpretation of isotopic data is crystallization between 393 and 419 Ma and therefore, authors assign an age of 406+/-13 Ma (Late Silurian to Early Devonian) to the Ansonia (Sevigny and Hanson, 1993) per CT007. Original map source: Connecticut Geological and Natural History Survey, DEP, in cooperation with the U.S. Geological Survey, 2000, Bedrock Geology of Connecticut, shapefile, scale 1:50,000

Lithology: Major:{gneiss}, Minor:{mica schist}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Ordovician - Neoproterozoic
443.8 - 1000 Ma



ID: 3190671
Precambrian-Phanerozoic sedimentary rocks

Age: Neoproterozoic to Ordovician (443.8 - 1000 Ma)

Lithology: Mudstone-carbonate-sandstone-conglomerate

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dale, T. Nelson and Herbert E. Gregory. (1911): The Granites of Connecticut. USGS Bulletin 484. pp. 70-71.
Januzzi, Ronald. (1959): The Minerals of Western Connecticut and Southeastern New York State. The Mineralogical Press, Danbury, Connectcut.
Schooner, Richard. (1961): The Mineralogy of Connecticut. Fluorescent House, Branford, Connecticut.
Hull, Daniel R. (1966): Bewitched Mine Hill, The Silver-Lead-Iron Mine of Roxbury, Connecticut. The Old Woodbury Historical Society, Woodbury, Connecticut.
Januzzi, Ronald. (1976): Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury, Connectcut.
Bell and Mayerfeld (1982): Time and Land: The Story of Mine Hill (Roxbury Land Trust; and Yale School of Forestry and Envirnomental Studies).
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 399.
Pawloski, John A. (2006). Connecticut Mining (Mt. Pleasant, SC: Arcadia Publishing) pp. 79-81.

External Links

Bell and Mayerfeld (1982) can be found here - http://www.roxburylandtrust.org/minehill.html


This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 21, 2019 11:26:35 Page generated: December 5, 2018 17:58:01
Go to top of page