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

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Key
Latitude & Longitude (WGS84):
41° 33' 10'' North , 72° 48' 57'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Meriden59,988 (2017)1.8km
Cheshire Village5,786 (2017)8.9km
Cheshire29,443 (2017)9.2km
Kensington8,459 (2017)10.0km
Wallingford17,712 (2017)10.7km


A typical trap rock mineral occurrence now exposed behind the Meriden Target store. But much material was found during site quarrying and development in 1998-2002.

Mineralization occurs between lava pillows in the Lower Jurassic Talcott Basalt. This is a popular place for geology students to visit. Inquire inside to collect in back of the store but the dumps off to the side are on public property and are reportedly OK to collect on.

The name given to the locality is not unique as most places where the Talcott Basalt is exposed in the area it shows pillows. Before the Westfield Mall just east of this locality did an expansion, there were pillow exposures there, and similar minerals were found. There is also a nice pillow exposure in a roadcut in the High Hill Road area south of East Main Street, Meriden. The state route 4 roadcuts up in Farmington are also a famous Talcott Basalt pillow exposure area.

The map coordinates are for the Target store.

Note: Tschernich's 1992 Zeolites of the World does not refer to this locality becaue the site development post-dates his publication, and Tschernich cites a much earlier reference by Urlich (1975).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals. 3 erroneous literature entries.

Detailed Mineral List:

Analcime
Formula: Na(AlSi2O6) · H2O
Description: Originally posted based on reference (Ulrich, 1975 cited by Tschernich, 1992) that is not referring to this location.
Anhydrite
Formula: CaSO4
Habit: tabular
Description: As tabular voids in later mineralization, nearly all anhydrite in Connecticut trap rock dissolved away early in the mineralization paragensis.
Reference: Harold Moritz collection
Calcite
Formula: CaCO3
Habit: scalenohedral and rhombohedral
Colour: white
Fluorescence: pale bluish-white overgrowths on orange-red under MW UV, paler under SW UV
Description: crystals to about 1.5 cm
Reference: Jeremy Zolan Collection; Rowan M. Lytle Collection; Harold Moritz collection
Chalcocite ?
Formula: Cu2S
Colour: black
Reference: Rowan M. Lytle Collection
Chalcopyrite
Formula: CuFeS2
Habit: granular
Colour: brassy with iridescence
Description: mm grains
Reference: Harold Moritz collection
'Chlorite Group'
Reference: Originally posted based on reference (Ulrich, 1975 cited by Tschernich, 1992) that is not referring to this location.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: Robert Shepard
Datolite
Formula: CaB(SiO4)(OH)
Habit: complex chisel-tipped crystals, granular
Colour: white to lime green
Fluorescence: patchy bright green under SW UV
Description: Pockets with abundant crystals to around 1 cm were common during site development.
Reference: Harold Moritz collection
Gypsum
Formula: CaSO4 · 2H2O
Habit: anhedral
Colour: colorless to white
Description: transparent cleavable masses in the core of vugs that tend to fall out and be found loose.
Reference: Fred Schuster collection; Harold Moritz collection
Hematite
Formula: Fe2O3
Habit: blebs and disk-shaped rosettes
Colour: maroon
Description: As specular to red blebs and partial rosettes to 1 mm.
Reference: Harold Moritz collection
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Originally posted based on reference (Ulrich, 1975 cited by Tschernich, 1992) that is not referring to this location.
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Habit: botryoidal crystal aggregates to individual rectangular crystals
Colour: shades of green
Description: Abundant during site development, as layers or spherical aggregates to about 1 cm with datolite.
Reference: Jeremy Zolan Collection; Harold Moritz collection
Quartz
Formula: SiO2
Habit: short prismatic to cumberland habit
Colour: colorless, milky, smoky
Description: Mostly drusy to about 1 cm crystals, abundant during site development. Associated with calcite.
Reference: Harold Moritz collection.
Quartz var: Amethyst
Formula: SiO2
Habit: hexagonal, not usually well formed
Colour: purple, pinkish-purple
Reference: Rowan M. Lytle Collection
Quartz var: Chalcedony
Formula: SiO2
Colour: Maroon
Description: In a vesicle with quartz and calcite.
Reference: Harold Moritz collection
'Stilbite subgroup'
Reference: Rowan M. Lytle Collection

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcocite ?2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anhydrite7.AD.30CaSO4
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Analcime ?9.GB.05Na(AlSi2O6) · H2O
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Datolite9.AJ.20CaB(SiO4)(OH)
Laumontite ?9.GB.10CaAl2Si4O12 · 4H2O
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Unclassified Minerals, Rocks, etc.
'Chlorite Group' ?-
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite ?2.4.7.1Cu2S
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anhydrite28.3.2.1CaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(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 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
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
Analcime ?77.1.1.1Na(AlSi2O6) · H2O
Laumontite ?77.1.1.4CaAl2Si4O12 · 4H2O
Unclassified Minerals, Mixtures, etc.
'Chlorite Group' ?-
Quartz
var: Amethyst
-SiO2
var: Chalcedony-SiO2
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H DatoliteCaB(SiO4)(OH)
H PrehniteCa2Al2Si3O10(OH)2
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H GypsumCaSO4 · 2H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H AnalcimeNa(AlSi2O6) · H2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C CalciteCaCO3
OOxygen
O DatoliteCaB(SiO4)(OH)
O AnhydriteCaSO4
O PrehniteCa2Al2Si3O10(OH)2
O CalciteCaCO3
O QuartzSiO2
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O Quartz (var: Amethyst)SiO2
O HematiteFe2O3
O Quartz (var: Chalcedony)SiO2
O GypsumCaSO4 · 2H2O
O LaumontiteCaAl2Si4O12 · 4H2O
O AnalcimeNa(AlSi2O6) · H2O
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
AlAluminium
Al PrehniteCa2Al2Si3O10(OH)2
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al AnalcimeNa(AlSi2O6) · H2O
SiSilicon
Si DatoliteCaB(SiO4)(OH)
Si PrehniteCa2Al2Si3O10(OH)2
Si QuartzSiO2
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si Quartz (var: Amethyst)SiO2
Si Quartz (var: Chalcedony)SiO2
Si LaumontiteCaAl2Si4O12 · 4H2O
Si AnalcimeNa(AlSi2O6) · H2O
SSulfur
S AnhydriteCaSO4
S GypsumCaSO4 · 2H2O
S ChalcopyriteCuFeS2
S ChalcociteCu2S
CaCalcium
Ca DatoliteCaB(SiO4)(OH)
Ca AnhydriteCaSO4
Ca PrehniteCa2Al2Si3O10(OH)2
Ca CalciteCaCO3
Ca GypsumCaSO4 · 2H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
FeIron
Fe HematiteFe2O3
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu ChalcopyriteCuFeS2
Cu ChalcociteCu2S

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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