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O & G Woodbury Quarry (Orenaug Quarry; O & G No. 1 Quarry), Orenaug Hills, Woodbury, Litchfield Co., Connecticut, USAi
Regional Level Types
O & G Woodbury Quarry (Orenaug Quarry; O & G No. 1 Quarry)Quarry
Orenaug HillsGroup of Hills
Woodbury- not defined -
Litchfield Co.County
ConnecticutState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 32' 33'' North , 73° 11' 47'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Woodbury Center1,294 (2017)0.7km
Woodbury9,755 (2017)1.1km
Middlebury6,974 (2017)5.9km
Southbury19,836 (2017)6.9km
Heritage Village3,736 (2017)7.2km


A trap rock quarry in basalt. Note that the O & G No. 2 Quarry http://www.mindat.org/loc-5370.html is also mostly situated in Woodbury, but because the entrance to the quarry is further south on Route 67 in Southbury, the No. 2 quarry is nearly universally called the Southbury Quarry. Januzzi (1976) refers to the Woodbury Quarry, but his description of the locality as off of Route 67 and synonymous with the Silliman Quarry indicates that he is actually discussing finds from the Southbury (No. 2) Quarry. Thus, minerals listed from Januzzi (1976) should be listed in the mindat page for the O & G Southbury or No. 2 quarry. In general the operations at the No. 1 quarry are older than at No. 2, with No. 1 being largely idle since the late 1990s.

There is, however, much similarity between the mineralogy of both quarries as they are in the same basalt formation only a few miles apart. As such, the descriptions below of the paragenesis and species for O & G No. 2 Quarry http://www.mindat.org/loc-5370.html is also valid for this quarry:

Well known Connecticut locality for prehnite. Three varieties are found - the standard green, rare yellow prehnite, and the extremely rare white prehnite that is almost completely free of iron impurities. Particularly noteworthy are prehnite floater specimens called "hearts". According to Garabedian (1998) these formed via a 5-step process:

1. Chalcedony precipitation on vesicle walls as "fortification" agate.
2. Chalcedony (or partial white, fine-grained, chalky quartz replacement of initial chalcedony) is replaced by fine-grained, white, granular datolite.
3. Prehnite encrusts and/or partly replaces the datolite replacement.
4. Datolite dissolves, leaving a floater of prehnite with large crystals on the inside (small ones may be present on the outside where the datolite was partly replaced by initial prehnite).
5. More prehnite forms on the outside of the prehnite floater, resulting in aggregates with large prehnite crystals on both sides.

Examples of all the intermediate steps can be found in the vesicles.

Other noteworthy pseudomorphing described by Garabedian (1998) include:

- Pumpellyite replacement of chalcedony.

- Tabular anhydrite crystals epimorphed by chalcedony, quartz, a trapezohedral zeolite, or pumpellyite; the anhydrite later dissolves.

- Prehnite or pumpellyite encrust a trapezohedral zeolite (wairakite or analcime), which later dissolves, and more prehnite or pumpellyite partly or completely fill in the void.

- Sequential "water level" vesicle fillings by thin layers of ferroan calcite that are later epimorphed by quartz, chalcedony, datolite or pumpellyite.

Late forming minerals include pyrite, gemmy green sphalerite crystals to about 6mm, calcite as dogteeth or various rhombs, apophyllite, babingtonite, julgodite, drusy quartz and zeolites.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


19 valid minerals.

Detailed Mineral List:

Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State; Tschernich, R. (1992): Zeolites of the World, 65
Anhydrite
Formula: CaSO4
Habit: tabular
Colour: unknown
Description: Crystals formed early in the mineral paragenesis, then they all naturally dissolved away (as did the vast majority of it throughout the trap rock). Found as voids and molds in later minerals, some of these form epimorphs that show the full former anhydrite crystal habit.
Reference: Former Ronald Januzzi collection
'Apophyllite'
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401.
Aragonite
Formula: CaCO3
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Babingtonite
Formula: Ca2(Fe,Mn)FeSi5O14(OH)
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401.
Baryte
Formula: BaSO4
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State; Tschernich, R. (1992): Zeolites of the World, 65
Calcite
Formula: CaCO3
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401.
'Chabazite'
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Chalcopyrite
Formula: CuFeS2
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State; Tschernich, R. (1992): Zeolites of the World, 65
'Chlorite Group'
Reference: [www.johnbetts-fineminerals.com]
Datolite
Formula: CaB(SiO4)(OH)
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State; Tschernich, R. (1992): Zeolites of the World, 65
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Tschernich, R. (1992): Zeolites of the World, 65
Fluorite
Formula: CaF2
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Galena
Formula: PbS
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Hematite
Formula: Fe2O3
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
'Heulandite subgroup'
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Habit: botryoidal masses
Colour: pale blue through pale green to pale yellow to white
Description: Excellent specimens in a variety of colors and sizes, associated with zeolites, datolite, apophyllite, calcite, quartz, pumpellyite.
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401; Zodac, Peter. (1938), Prehnite. Rocks & Minerals: 13(5): 131.
'Pumpellyite'
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401; Tschernich, R. (1992): Zeolites of the World, 65.
Pyrite
Formula: FeS2
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Quartz
Formula: SiO2
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State; Tschernich, R. (1992): Zeolites of the World, 65
Quartz var: Agate
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Quartz var: Amethyst
Formula: SiO2
Reference: Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401.
Quartz var: Chalcedony
Formula: SiO2
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Januzzi (1976) Mineral Localities of Connecticut & Southeastern New York State
Stellerite ?
Formula: Ca4(Si28Al8)O72 · 28H2O
Habit: wheat sheave of bowtie aggregates
Colour: tan to orange
Description: SEM-EDS analysis on 3 samples in 2019, though not definitive for this species, indicate that one is almost certainly stilbite-Ca (www.mindat.org/photo-463511.html), one is probably stilbite-Ca (www.mindat.org/photo-729944.html) and one is possibly stellerite (www.mindat.org/photo-728788.html). Stellerite cannot be visually distinguished from stilbite-Ca.
Reference: Harold Moritz collection
Stilbite-Ca
Formula: NaCa4[Al9Si27O72] · nH2O
Habit: bow-tie aggregates or rectangular crystals with "flat-top" terminations
Colour: colorless, tan to orange
Description: As divergent aggregates arranged as half or full "bow-ties" with peaked terminations, or as isolated, rectangular crystals with "flat-top" terminations. SEM-EDS analysis on 3 samples in 2019, though not definitive for this species, indicate that one is almost certainly stilbite-Ca (www.mindat.org/photo-463511.html), one is probably stilbite-Ca (www.mindat.org/photo-729944.html) and one is possibly stellerite (www.mindat.org/photo-728788.html). Stellerite cannot be visually distinguished from stilbite-Ca.
Reference: Tschernich, R. (1992): Zeolites of the World, 65; Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Galena2.CD.10PbS
Pyrite2.EB.05aFeS2
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
var: Agate4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anhydrite7.AD.30CaSO4
Baryte7.AD.35BaSO4
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Babingtonite9.DK.05Ca2(Fe,Mn)FeSi5O14(OH)
Datolite9.AJ.20CaB(SiO4)(OH)
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Stellerite ?9.GE.15Ca4(Si28Al8)O72 · 28H2O
Stilbite-Ca9.GE.10NaCa4[Al9Si27O72] · nH2O
Unclassified Minerals, Rocks, etc.
'Apophyllite'-
'Chabazite'-
'Chlorite Group'-
'Heulandite subgroup'-
'Limonite'-(Fe,O,OH,H2O)
'Pumpellyite'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anhydrite28.3.2.1CaSO4
Baryte28.3.1.1BaSO4
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(OH)
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=5
Babingtonite65.4.1.2Ca2(Fe,Mn)FeSi5O14(OH)
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Stellerite ?77.1.4.4Ca4(Si28Al8)O72 · 28H2O
Stilbite-Ca77.1.4.3NaCa4[Al9Si27O72] · nH2O
Unclassified Minerals, Mixtures, etc.
'Apophyllite'-
Aragonite-CaCO3
'Chabazite'-
'Chlorite Group'-
'Heulandite subgroup'-
'Limonite'-(Fe,O,OH,H2O)
'Pumpellyite'-
Quartz
var: Agate
-SiO2
var: Amethyst-SiO2
var: Chalcedony-SiO2
var: Smoky Quartz-SiO2

List of minerals for each chemical element

HHydrogen
H PrehniteCa2Al2Si3O10(OH)2
H Stilbite-CaNaCa4[Al9Si27O72] · nH2O
H BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
H LaumontiteCaAl2Si4O12 · 4H2O
H Limonite(Fe,O,OH,H2O)
H NatroliteNa2Al2Si3O10 · 2H2O
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H DatoliteCaB(SiO4)(OH)
H AnalcimeNa(AlSi2O6) · H2O
H StelleriteCa4(Si28Al8)O72 · 28H2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C AragoniteCaCO3
C CalciteCaCO3
OOxygen
O PrehniteCa2Al2Si3O10(OH)2
O Stilbite-CaNaCa4[Al9Si27O72] · nH2O
O AragoniteCaCO3
O BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
O Quartz (var: Amethyst)SiO2
O Quartz (var: Smoky Quartz)SiO2
O CalciteCaCO3
O Quartz (var: Chalcedony)SiO2
O HematiteFe2O3
O LaumontiteCaAl2Si4O12 · 4H2O
O Limonite(Fe,O,OH,H2O)
O NatroliteNa2Al2Si3O10 · 2H2O
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O DatoliteCaB(SiO4)(OH)
O BaryteBaSO4
O AnalcimeNa(AlSi2O6) · H2O
O AnhydriteCaSO4
O StelleriteCa4(Si28Al8)O72 · 28H2O
FFluorine
F FluoriteCaF2
NaSodium
Na Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na AnalcimeNa(AlSi2O6) · H2O
AlAluminium
Al PrehniteCa2Al2Si3O10(OH)2
Al Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al AnalcimeNa(AlSi2O6) · H2O
Al StelleriteCa4(Si28Al8)O72 · 28H2O
SiSilicon
Si PrehniteCa2Al2Si3O10(OH)2
Si Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Si BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Smoky Quartz)SiO2
Si Quartz (var: Chalcedony)SiO2
Si LaumontiteCaAl2Si4O12 · 4H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si DatoliteCaB(SiO4)(OH)
Si AnalcimeNa(AlSi2O6) · H2O
Si StelleriteCa4(Si28Al8)O72 · 28H2O
SSulfur
S GalenaPbS
S PyriteFeS2
S ChalcopyriteCuFeS2
S BaryteBaSO4
S AnhydriteCaSO4
CaCalcium
Ca PrehniteCa2Al2Si3O10(OH)2
Ca Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Ca AragoniteCaCO3
Ca BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Ca CalciteCaCO3
Ca FluoriteCaF2
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca DatoliteCaB(SiO4)(OH)
Ca AnhydriteCaSO4
Ca StelleriteCa4(Si28Al8)O72 · 28H2O
MnManganese
Mn BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
FeIron
Fe BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
Fe PyriteFeS2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChalcopyriteCuFeS2
BaBarium
Ba BaryteBaSO4
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Zodac, Peter. (1938), Prehnite. Rocks & Minerals: 13(5): 131.
Januzzi, Ronald E. (1976), Mineral Localities of Connecticut and Southeastern New York State. The Mineralogical Press, Danbury, Connecticut.
Brunet, William (1977): Mineral Collecting in Woodbury-Southbury, Connecticut, Rocks & Minerals: 52: 182-183.
Tschernich, Rudy. (1992): Zeolites of the World, 65.
Weber, Marcelle H. and Earle C. Sullivan. (1995), Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), 70(6): 401.
Garabedian, James A. (1998), Secondary Mineralization of Half-Moon Vesicles in the Mesozoic Basalt of the O&G#2 Quarry, Woodbury, Connecticut. University of Connecticut Master of Science Thesis.

Other Regions, Features and Areas containg this locality

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