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Ultramafic rock bodies, Haddam, Middlesex County, Connecticut, USAi
Regional Level Types
Ultramafic rock bodies- not defined -
HaddamTown
Middlesex CountyCounty
ConnecticutState
USACountry

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PhotosMapsSearch
05252010017272350599585.jpg
Actinolite, etc.

Ultramafic rock bodies, Haddam, Middlesex County, Connecticut, USA
07207650017272042144315.jpg
Enstatite

Ultramafic rock bodies, Haddam, Middlesex County, Connecticut, USA
05252010017272350599585.jpg
Actinolite, etc.

Ultramafic rock bodies, Haddam, Middlesex County, Connecticut, USA
07207650017272042144315.jpg
Enstatite

Ultramafic rock bodies, Haddam, Middlesex County, Connecticut, USA
00851780017272018641337.jpg
Actinolite, etc.

Ultramafic rock bodies, Haddam, Middlesex County, Connecticut, USA
07207650017272042144315.jpg
Enstatite

Ultramafic rock bodies, Haddam, Middlesex County, Connecticut, USA
Latitude & Longitude (WGS84):
41° 26' 9'' North , 72° 29' 33'' West
Latitude & Longitude (decimal):
41.43611,-72.49250
GeoHash:
G#: drk7wrhwf
GRN:
N28W40
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
East Haddam9,042 (2017)3.2km
Chester Center1,558 (2017)5.1km
Deep River Center2,484 (2017)7.5km
Moodus1,413 (2017)8.2km
Higganum1,698 (2017)8.6km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut29km
New Haven Mineral ClubNew Haven, Connecticut39km
Bristol Gem & Mineral ClubBristol, Connecticut46km
Mindat Locality ID:
294243
Long-form identifier:
mindat:1:2:294243:1
GUID (UUID V4):
0


Six small conformable bodies of metamorphosed ultramafic rock are mapped within the Middletown Formation in SE Haddam, within 1 km of the border with Chester and just west of the state Route 82 connector between state Routes 9 and 154. According to Lundgren (1963), they consist mostly of green amphibole presumed to be actinolite, with lesser quantities of "hypersthene" (enstatite), olivine, magnetite-ilmenite, green spinel, plagioclase, chlorite and traces of annite, talc and serpentine. Coordinates are for the largest mass, which is a few hundred feet long and underlies a small hill, with enstatite crystals weathered out in relief.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


7 valid minerals.

Detailed Mineral List:

ⓘ Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Habit: acicular
Colour: green
ⓘ Annite
Formula: KFe2+3(AlSi3O10)(OH)2
ⓘ 'Chlorite Group'
ⓘ Enstatite
Formula: Mg2Si2O6
Habit: elongated prismatic
Colour: dark brown-black
Description: dark but translucent, elongated crystals frozen in actinolite matrix, micro-crystals in tiny voids
ⓘ 'Fayalite-Forsterite Series'
ⓘ Ilmenite
Formula: Fe2+TiO3
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ Spinel
Formula: MgAl2O4
ⓘ Talc
Formula: Mg3Si4O10(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘSpinel4.BB.05MgAl2O4
ⓘIlmenite4.CB.05Fe2+TiO3
Group 9 - Silicates
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘActinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘAnnite9.EC.20KFe2+3(AlSi3O10)(OH)2
Unclassified
ⓘ'Chlorite Group'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4

List of minerals for each chemical element

HHydrogen
Hⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Hⓘ AnniteKFe32+(AlSi3O10)(OH)2
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
OOxygen
Oⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Oⓘ AnniteKFe32+(AlSi3O10)(OH)2
Oⓘ EnstatiteMg2Si2O6
Oⓘ IlmeniteFe2+TiO3
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ SpinelMgAl2O4
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ Fayalite-Forsterite Series
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
NaSodium
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ SpinelMgAl2O4
Mgⓘ TalcMg3Si4O10(OH)2
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ AnniteKFe32+(AlSi3O10)(OH)2
Alⓘ SpinelMgAl2O4
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Siⓘ AnniteKFe32+(AlSi3O10)(OH)2
Siⓘ EnstatiteMg2Si2O6
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ Fayalite-Forsterite Series
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
KPotassium
Kⓘ AnniteKFe32+(AlSi3O10)(OH)2
CaCalcium
Caⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiⓘ IlmeniteFe2+TiO3
FeIron
Feⓘ Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Feⓘ AnniteKFe32+(AlSi3O10)(OH)2
Feⓘ IlmeniteFe2+TiO3
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Fayalite-Forsterite Series

Other Regions, Features and Areas containing this locality

North AmericaContinent
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

Lundgren, Lawrence, Jr. (1963): The Bedrock Geology of the Deep River Quadrangle. State Geological and Natural History Survey of Connecticut. Quadrangle Report No. 13: 19-21.
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