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New Haven, New Haven Co., Connecticut, USAi
Regional Level Types
New Haven- not defined -
New Haven Co.County
ConnecticutState
USACountry

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Key
06938430014946990468440.jpg
Yale Peabody Museum (1909 or earlier)

New Haven, New Haven Co., Connecticut, USA
06938430014946990468440.jpg
Yale Peabody Museum (1909 or earlier)

New Haven, New Haven Co., Connecticut, USA
01533750014946990475862.jpg
Yale Peabody Museum (1909 or earlier)

New Haven, New Haven Co., Connecticut, USA
Latitude & Longitude (WGS84):
41° 18' 27'' North , 72° 55' 34'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
New Haven130,322 (2017)0.2km
West Haven54,927 (2017)4.5km
East Haven29,257 (2017)6.0km
Woodbridge9,355 (2017)8.5km
Orange13,956 (2017)8.9km


A city first settled by Europeans in 1638 and incorporated as a city in 1784. It is the home of Yale University and the Yale-Peabody Museum, which houses a substantial world-wide mineral collection. Surrounding towns (such as East and West Haven and Hamden) were separated from New Haven over the centuries since its incorporation, leading to the inclusion of minerals in old or general references (like Robinson (1825), Schairer (1931), Sohon (1951), Januzzi (1976)), that are now attributable to these other towns or where just noted as "near" New Haven.

The bedrock geology of New Haven consists mostly of rocks within the Early Mesozoic Hartford Basin, part of the Newark Supergroup of rift basins. These rocks are mostly the Triassic New Haven Arkose with prominent ridges at West and East Rocks underlain by the Jurassic West Rock Diabase sill/dike complex. Other Jurassic dikes form smaller ridges along the east city border and cutting West Rock just north of the state Route 15 tunnel. Quarrying of diabase has produced prehnite, calcite, zeolites, and apophyllite attributed to New Haven, but these quarries (most notably Pine Rock Quarry in Hamden) are now mostly not in the city due to subdividing mentioned above. The extreme NW corner of New Haven, west of state Route 69 and Forest Road, is underlain by Ordovician to Silurian metamorphic rocks of the Orange-Milford Terrane, with the nonconformity between these and the overlying New Haven Arkose exposed at the foot of powerline pylons at the retail plaza on state Route 63 immediately north of state Route 15. The Milford-Orange Terrane includes serpentinite bodies, one of which, in the Malby Lakes area of West Haven, was quarried by Benjamin Silliman in the 1810s, but none of these is within New Haven's limits due to subdivision. In the extreme SE corner of the city, at Lighthouse Point, is an exposure of granite that is part of the Gander Terrane.

Coordinates are for the middle of the town green, which is the center of the original nine squares laid out for development by the first European settlers.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

9 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: Longwell & Dana, 1932. Walks & Rides in Central CT & MA.
Andradite var: Melanite
Formula: Ca3Fe3+2(SiO4)3
Habit: rhombic dodecahedral, often in nearly parallel positions in rosettes
Colour: dark-brown to jet-black, occasionally yellowish-brown
Description: Rosettes reach to about 2 cm across.
Reference: Dana, Edward S. (1877): On the occurrence of Garnets with the Trap of New Haven, Connecticut. American Journal of Science Series 3, Volume 14, page 215.
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Habit: acicular prisms
Colour: yellow-green
Description: Minute prisms, in and among the pyroxene and penetrating the garnets.
Reference: Dana, Edward S. (1877): On the occurrence of Garnets with the Trap of New Haven, Connecticut. American Journal of Science Series 3, Volume 14, page 215.
'Apophyllite' ?
Description: May be in reference to minerals found at the Pine Rock Quarry just over the border in Hamden.
Reference: Ulrich, William. (1975), A field guide to the Cinque traprock quarry. Lapidary Journal: 28: 1608-1622, 1654.
Aragonite
Formula: CaCO3
Habit: radiating acicular
Colour: white
Description: Sprays in vein less than 1 cm long
Reference: Alfred E. Hammer collection
Calcite
Formula: CaCO3
Chalcopyrite
Formula: CuFeS2
Description: Traces.
Reference: Dana, Edward S. (1877): On the occurrence of Garnets with the Trap of New Haven, Connecticut. American Journal of Science Series 3, Volume 14, page 215.
'Chlorite Group'
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Description: A completely unsubstantiated guess.
Reference: Januzzi, Ronald E. and David Seaman (1976), Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Epidote var: Tawmawite
Formula: {Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
Description: A completely unsubstantiated guess.
Reference: Januzzi, Ronald E. and David Seaman (1976), Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
Magnetite
Formula: Fe2+Fe3+2O4
Habit: octahedral
Colour: black
Description: brilliant octahedrons, scattered sometimes thickly, sometimes sparsely, over the surface of the rock; it uniformly underlies the garnet where they occur together (Dana, 1877).
Reference: Dana, Edward S. (1877): On the occurrence of Garnets with the Trap of New Haven, Connecticut. American Journal of Science Series 3, Volume 14, page 215.; Longwell & Dana, 1932. Walks & Rides in Central CT & MA.
Prehnite ?
Formula: Ca2Al2Si3O10(OH)2
Description: May be in reference to minerals found at the Pine Rock Quarry just over the border in Hamden.
Reference: Ulrich, William. (1975), A field guide to the Cinque traprock quarry. Lapidary Journal: 28: 1608-1622, 1654.
'Pyroxene Group'
Habit: altered to chlorite
Colour: green
Description: minute dark-green crystals, destitute of luster; they are crowded together on the surface of the rock. These crystals are strictly pseudomorphs after pyroxene, for though having unquestionably its form, they are so soft as to be easily cut with a knife (Dana, 1877)
Reference: Dana, Edward S. (1877): On the occurrence of Garnets with the Trap of New Haven, Connecticut. American Journal of Science Series 3, Volume 14, page 215.
Quartz
Formula: SiO2
Quartz var: Jasper ?
Description: In "rolled masses", now called cobbles of boulders in unconsolidated overburden. Noted as "near" New Haven, so may not be within the modern city limits.
Reference: Robinson, Samuel. (1825): A Catalogue of American Minerals, With Their Localities; Including All Which Are Known to Exist in the United States and British Provinces, And Having the Towns, Counties, and Districts in Each State and Province Arranged Alphabetically. With an Appendix, Containing Additional Localities and a Tabular View. Cummings, Hilliard, & Co., Boston.
Sphalerite
Formula: ZnS
Description: Traces
Reference: Dana, Edward S. (1877): On the occurrence of Garnets with the Trap of New Haven, Connecticut. American Journal of Science Series 3, Volume 14, page 215.
'Stilbite subgroup' ?
Description: May be in reference to minerals found at the Pine Rock Quarry just over the border in Hamden.
Reference: Ulrich, William. (1975), A field guide to the Cinque traprock quarry. Lapidary Journal: 28: 1608-1622, 1654.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var: Jasper ?4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Calcite5.AB.05CaCO3
Group 9 - Silicates
Andradite9.AD.25Ca3Fe3+2(SiO4)3
var: Melanite9.AD.25Ca3Fe3+2(SiO4)3
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
var: Tawmawite9.BG.05a{Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
Prehnite ?9.DP.20Ca2Al2Si3O10(OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Apophyllite' ?-
'Chlorite Group'-
'Pyroxene Group'-
'Stilbite subgroup' ?-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
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 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
Prehnite ?72.1.3.1Ca2Al2Si3O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Andradite
var: Melanite
-Ca3Fe3+2(SiO4)3
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Apophyllite' ?-
Aragonite-CaCO3
'Chlorite Group'-
Epidote
var: Tawmawite
-{Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
'Pyroxene Group'-
Quartz
var: Jasper ?
-SiO2
'Stilbite subgroup' ?-

List of minerals for each chemical element

HHydrogen
H Epidote (var: Tawmawite){Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
H ApatiteCa5(PO4)3(Cl/F/OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H PrehniteCa2Al2Si3O10(OH)2
CCarbon
C AragoniteCaCO3
C CalciteCaCO3
OOxygen
O Andradite (var: Melanite)Ca3Fe23+(SiO4)3
O Epidote (var: Tawmawite){Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
O MagnetiteFe2+Fe23+O4
O AndraditeCa3Fe23+(SiO4)3
O AragoniteCaCO3
O CalciteCaCO3
O QuartzSiO2
O ApatiteCa5(PO4)3(Cl/F/OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O PrehniteCa2Al2Si3O10(OH)2
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
AlAluminium
Al Epidote (var: Tawmawite){Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al PrehniteCa2Al2Si3O10(OH)2
SiSilicon
Si Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Si Epidote (var: Tawmawite){Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
Si AndraditeCa3Fe23+(SiO4)3
Si QuartzSiO2
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si PrehniteCa2Al2Si3O10(OH)2
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S ChalcopyriteCuFeS2
S SphaleriteZnS
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
Ca Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Ca Epidote (var: Tawmawite){Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
Ca AndraditeCa3Fe23+(SiO4)3
Ca AragoniteCaCO3
Ca CalciteCaCO3
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca PrehniteCa2Al2Si3O10(OH)2
CrChromium
Cr Epidote (var: Tawmawite){Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
FeIron
Fe Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Fe Epidote (var: Tawmawite){Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH)
Fe MagnetiteFe2+Fe23+O4
Fe AndraditeCa3Fe23+(SiO4)3
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Ulrich, William. (1975), A field guide to the Cinque traprock quarry. Lapidary Journal: 28: 1608-1622, 1654.
Januzzi, Ronald E. and David Seaman (1976), Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.

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