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State Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USAi
Regional Level Types
State Route 9 rock cuts- not defined -
HaddamTown
Middlesex CountyCounty
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01232920017490186018707.jpg
View of Northbound Lanes

State Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
01232920017490186018707.jpg
View of Northbound Lanes

State Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
01831290017448841489679.jpg
View of Northbound Lanes

State Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
Latitude & Longitude (WGS84):
41° 26' 45'' North , 72° 31' 14'' West
Latitude & Longitude (decimal):
41.44601,-72.52067
GRN:
N28W40
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
East Haddam9,042 (2017)5.0km
Higganum1,698 (2017)6.4km
Chester Center1,558 (2017)7.5km
Moodus1,413 (2017)8.6km
Deep River Center2,484 (2017)9.9km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut26km
New Haven Mineral ClubNew Haven, Connecticut37km
Bristol Gem & Mineral ClubBristol, Connecticut44km
Mindat Locality ID:
263238
Long-form identifier:
mindat:1:2:263238:7
GUID (UUID V4):
0


This locality page is for the long rock cuts SSE of the Beaver Meadow Road interchange area, which has its own locality page, as do the cuts at the state Route 81 interchange.

These cuts, made in the late 1960s, extend for about 1 km, between Filley Road and Cedar Lake Road, and expose various metamorphic rocks (schist, gneiss, amphibolite, marble) of the Ordovician Collins Hill Formation and pegmatites. The geology of the cuts is mapped in detail in Lundgren (1979) (Figure 6). Most of the mineral finds are detailed in Schooner (circa 1990).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


22 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
Habit: anhedral
ⓘ Axinite-(Fe)
Formula: Ca2Fe2+Al2BSi4O15OH
Habit: axe head shaped
Colour: lavender, purplish brown
Description: According to Schooner, occurs with tan titanite and pink feldspar. A specimen in the Bill Henderson micromount collection at Yale Peabody Museum consists of white albite matrix hosting a small void partially filled with purplish-brown, glassy axinite crystals (mislabeled as titanite) and tiny vermiform chlorite.
ⓘ Azurite
Formula: Cu3(CO3)2(OH)2
Habit: crust
Colour: light blue
Description: A few scanty crusts of light blue azurite, with malachite and chalcopyrite, on amphibolite (Schooner, circa 1985).
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Habit: anhedral
Colour: black
ⓘ Calcite
Formula: CaCO3
Habit: anhedral
ⓘ Chalcopyrite
Formula: CuFeS2
Description: Little masses, surrounded by malachite, were found in gedrite gneiss (Schooner, circa 1985).
ⓘ Cronstedtite
Formula: Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4
Habit: radial groups of flattened crystals
Colour: greenish-brown to almost black
Description: A drab greenish-brown to almost black mineral, abundantly associated with grunerite, siderite, and marcasite, was identified as chamosite. Careful restudy of X-ray data indicates cronstedtite as a better fit.
ⓘ Diopside
Formula: CaMgSi2O6
Habit: anhedral
ⓘ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Grunerite
Formula: ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Description: siderite layers up to 1/2 inch were common in a vein of marcasite, cronstedtite, grunerite, and quartz (Schooner, circa 1985).
ⓘ 'Hornblende Root Name Group'
Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
Habit: crust
Description: A few scanty crusts of light blue azurite, with malachite and chalcopyrite, on amphibolite (Schooner, circa 1985).
ⓘ Marcasite
Formula: FeS2
Description: in a quartz vein, several feet thick, with considerable marcasite, siderite, and cronstedtite (Schooner, circa 1985).
ⓘ Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
Description: Alteration of the marcasite-siderite vein.
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: anhedral
ⓘ Paragonite
Formula: NaAl2(AlSi3O10)(OH)2
Habit: anhedral
Colour: white to gray
Description: Sillimanite, collected in a quartz vein through schist, is altered, in a few samples, to a very soft, greasy-feeling, white or gray material. X-ray study indicates a mixture of fine-grained paragonite and subsidiary pyrophyllite. A fingernail easily scratches it.
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Habit: anhedral flakes
Colour: brown
Description: In the calcite marble.
ⓘ Pyrite
Formula: FeS2
ⓘ Pyrophyllite
Formula: Al2Si4O10(OH)2
Description: Sillimanite, collected in a quartz vein through schist, is altered, in a few samples, to a very soft, greasy-feeling, white or gray material. X-ray study indicates a mixture of fine-grained paragonite and subsidiary pyrophyllite. A fingernail easily scratches it.
ⓘ Quartz
Formula: SiO2
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ Siderite
Formula: FeCO3
Habit: drusy
Colour: brown
Description: siderite layers up to 1/2 inch were common in a vein of marcasite, cronstedtite, grunerite, and quartz. Nice little curved brown drusy crystals are present on a few specimens.
ⓘ Sillimanite
Formula: Al2(SiO4)O
Habit: parallel-fibrous
Description: Excellent specimens of parallel-fibrous sillimanite, some altered to fine-grained mica and pyrophyllite, were collected in quartz veins (Schooner, circa 1985).
ⓘ Titanite
Formula: CaTi(SiO4)O
Colour: tan
Description: tan crystals with lavender ferroaxinite and pink feldspar (Schooner, circa 1985)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘSiderite5.AB.05FeCO3
ⓘAzurite5.BA.05Cu3(CO3)2(OH)2
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘMelanterite7.CB.35Fe2+(H2O)6SO4 · H2O
Group 9 - Silicates
ⓘSillimanite9.AF.05Al2(SiO4)O
ⓘTitanite9.AG.15CaTi(SiO4)O
ⓘAxinite-(Fe)9.BD.20Ca2Fe2+Al2BSi4O15OH
ⓘEpidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘDiopside9.DA.15CaMgSi2O6
ⓘGrunerite9.DE.05◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2
ⓘPyrophyllite9.EC.10Al2Si4O10(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘParagonite9.EC.15NaAl2(AlSi3O10)(OH)2
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
ⓘCronstedtite9.ED.15Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Hornblende Root Name Group'-◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
ⓘ'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
Hⓘ AzuriteCu3(CO3)2(OH)2
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
Hⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hⓘ Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Hⓘ Grunerite◻{Fe22+}{Fe52+}(Si8O22)(OH)2
Hⓘ MalachiteCu2(CO3)(OH)2
Hⓘ MelanteriteFe2+(H2O)6SO4 · H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ ParagoniteNaAl2(AlSi3O10)(OH)2
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Hⓘ PyrophylliteAl2Si4O10(OH)2
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
BBoron
Bⓘ Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
Cⓘ AzuriteCu3(CO3)2(OH)2
Cⓘ CalciteCaCO3
Cⓘ MalachiteCu2(CO3)(OH)2
Cⓘ SideriteFeCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AzuriteCu3(CO3)2(OH)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CalciteCaCO3
Oⓘ CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
Oⓘ DiopsideCaMgSi2O6
Oⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oⓘ Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Oⓘ Grunerite◻{Fe22+}{Fe52+}(Si8O22)(OH)2
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ MelanteriteFe2+(H2O)6SO4 · H2O
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ ParagoniteNaAl2(AlSi3O10)(OH)2
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ PyrophylliteAl2Si4O10(OH)2
Oⓘ QuartzSiO2
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ SideriteFeCO3
Oⓘ SillimaniteAl2(SiO4)O
Oⓘ TitaniteCaTi(SiO4)O
Oⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Oⓘ Garnet GroupX3Z2(SiO4)3
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ ParagoniteNaAl2(AlSi3O10)(OH)2
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alⓘ Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ ParagoniteNaAl2(AlSi3O10)(OH)2
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ PyrophylliteAl2Si4O10(OH)2
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ SillimaniteAl2(SiO4)O
Alⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
Siⓘ DiopsideCaMgSi2O6
Siⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siⓘ Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Siⓘ Grunerite◻{Fe22+}{Fe52+}(Si8O22)(OH)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ ParagoniteNaAl2(AlSi3O10)(OH)2
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ PyrophylliteAl2Si4O10(OH)2
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ SillimaniteAl2(SiO4)O
Siⓘ TitaniteCaTi(SiO4)O
Siⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
Siⓘ Garnet GroupX3Z2(SiO4)3
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ MarcasiteFeS2
Sⓘ MelanteriteFe2+(H2O)6SO4 · H2O
Sⓘ PyriteFeS2
ClChlorine
Clⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DiopsideCaMgSi2O6
Caⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caⓘ Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Caⓘ TitaniteCaTi(SiO4)O
Caⓘ Hornblende Root Name Group◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ TitaniteCaTi(SiO4)O
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ ChalcopyriteCuFeS2
Feⓘ CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
Feⓘ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feⓘ Axinite-(Fe)Ca2Fe2+Al2BSi4O15OH
Feⓘ Grunerite◻{Fe22+}{Fe52+}(Si8O22)(OH)2
Feⓘ MarcasiteFeS2
Feⓘ MelanteriteFe2+(H2O)6SO4 · H2O
Feⓘ PyriteFeS2
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Feⓘ SideriteFeCO3
CuCopper
Cuⓘ AzuriteCu3(CO3)2(OH)2
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ MalachiteCu2(CO3)(OH)2

Other Regions, Features and Areas containing this locality

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North America PlateTectonic Plate

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.

References

Schooner, Richard. (circa 1990), Untitled manuscript on central Connecticut mineralogy.
Lundgren, Lawrence Jr. (1979) The Bedrock Geology of the Haddam Quadrangle. Quadrangle Report 37.. State Geological and Natural History Survey of Connecticutp.37
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