State Route 2 roadcut, Marlborough, Hartford County, Connecticut, USAi
Regional Level Types | |
---|---|
State Route 2 roadcut | Road Cutting |
Marlborough | Town |
Hartford County | County |
Connecticut | State |
USA | Country |
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Latitude & Longitude (WGS84):
41° 39' 10'' North , 72° 30' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Terramuggus | 1,025 (2017) | 3.1km |
Lake Pocotopaug | 3,436 (2017) | 6.1km |
East Hampton | 2,691 (2017) | 8.5km |
Glastonbury Center | 7,387 (2017) | 9.8km |
Hebron | 9,298 (2017) | 11.1km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
Club | Location | Distance |
---|---|---|
Lapidary and Mineral Society of Central Connecticut | Meriden, Connecticut | 29km |
Bristol Gem & Mineral Club | Bristol, Connecticut | 37km |
Mindat Locality ID:
213277
Long-form identifier:
mindat:1:2:213277:1
GUID (UUID V4):
4dd0f121-4c7e-402f-a9d8-bf20a0be5bc8
Schooner (1958) describes it as "an old rock cut on Route 2 near the Glastonbury-Marlborough line...in the latter town". Because the current State Route 2 expressway was under construction in the late 1950s in this area, Schooner's use of "old" in 1958 means this was a cut on the old Route 2, aka the New London Turnpike from Hartford. The current expressway bypasses much of this older route, but this locality is at an area where the expressway snakes through a pass in rugged terrain formed by the Devonian-Silurian Fitch, Clough and Littleton metasediments. Here the old turnpike, and most likely the locality also, was obliterated by the new overlapping expressway constructed through the same pass. It could be they were exploring rock opened by the new Route 2 construction. He attributes the discovery of what appears to be an alpine cleft type occurrence to himself and Klaus Albrecht.
In Schooner (1961) he provides further details on the occurrence:
"which lined an open cavity in pegmatized gneiss, near a small lens of metamorphosed limestone". This statement, and the presence of calc-silicate minerals in the cavity, suggests the cut was in the Fitch Formation - a calc-silicate gneiss with minor marble.
Because the exact locality is not known, the locality coordinates are based on the presence of Rt. 2 expressway cuts visible on USGS topo maps and where the Fitch Formation crosses the road.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
11 valid minerals.
* - Minerals that have never been found, but their existence is inferred in some way (e.g. from pseudomorphs)
Detailed Mineral List:
ⓘ Anhydrite Formula: CaSO4 Description: Voids in massive prehnite where anhydrite has dissolved away. |
✪ Axinite-(Fe) Formula: Ca2Fe2+Al2BSi4O15OH Habit: tabular, axe-head shaped Colour: lavender-brown Description: "Beautiful groups of tabular crystals, up to an inch across, were associated with prehnite and several other minerals in a small cavity in gneiss. The largest group was almost three inches long. Most of the crystals were colored green by inclusions of chlorite, but some were of a typical lavender-brown tint and quite gemmy. Pseudomorphs of chlorite after axinite were fairly abundant. This is the first reported occurrence of axinite in Connecticut." Schooner (1958)
"Groups of simple axe-shaped crystals, up to two inches across, were embedded in loose chlorite, with some admixed clay. The crystals were of two types: lavender-brown, glassy, and without inclusions, and greenish, opaque, and thoroughly impregnated with the chlorite. Some of the smaller examples of the latter kind were pseudomorphs of chlorite after axinite. In all cases, there seemed to be two generations of axinite crystals, differing in size but not in habit. One large crystal had a number of smaller ones clustered on its surfaces." Schooner (1961) |
ⓘ 'Chabazite' Description: "A few tiny crystals, of cube-like form, were observed at the axinite locality in Marlborough." Schooner (1958) |
ⓘ 'Chlorite Group' Habit: granular, pseudomorphs after axinite Colour: green Description: axinite crystals were "colored green by inclusions of chlorite... Pseudomorphs of chlorite after axinite were fairly abundant." Schooner (1958) |
ⓘ Diopside Formula: CaMgSi2O6 Description: "Some little prismatic crystals [of scapolite] have been noted with diopside, close to the axinite pocket in Marlborough." Schooner (1961). |
ⓘ 'K Feldspar' Colour: white Description: "The author has collected small curved crystals, with prehnite, axinite, and zoisite, at the road cut locality in Marlborough." Schooner (1961). Referred to as orthoclase occurring as "A few little opaque white crystals" in Schooner (1958). |
ⓘ 'K Feldspar var. Adularia' Formula: KAlSi3O8 Colour: white Description: "The author has collected small curved crystals, with prehnite, axinite, and zoisite, at the road cut locality in Marlborough." Schooner (1961). Referred to as orthoclase occurring as "A few little opaque white crystals" in Schooner (1958). |
ⓘ Laumontite Formula: CaAl2Si4O12 · 4H2O Description: "The author has seen a little laumontite on specimens from the axinite locality in Marlborough." Schooner (1961) |
ⓘ 'Monazite' ? Formula: REE(PO4) Description: No details provided by the reference. |
✪ Prehnite Formula: Ca2Al2Si3O10(OH)2 Habit: tabular Colour: yellow Description: "Klaus Albrecht and the author collected many examples of yellow prehnite, associated with axinite and a variety of other minerals...One small piece shows beautiful individual ½ inch tabular crystals... the finest that the author has ever seen. Much of the massive prehnite contained anhydrite casts." Schooner (1958) |
ⓘ Quartz Formula: SiO2 Colour: smoky Description: "Recently, a few light smoky crystals, up to two inches long, were obtained from a cavity in gneiss in the cut on Route 2 in Marlborough...The crystals were coated with granular chlorite, and several showed trapezohedral modifications; these are rare in Connecticut, though typical of the Alpine veins in which the mineral associations are very similar." Schooner (1958) |
ⓘ 'Scapolite' Description: "Some little prismatic crystals have been noted with diopside, close to the axinite pocket in Marlborough." Schooner (1961). |
ⓘ Staurolite Formula: Fe2+2Al9Si4O23(OH) Description: "Cuts along Route 2, near the Marlborough-Glastonbury town line, contain innumerable crystals, some of good size." Schooner (1958). |
ⓘ 'Stilbite Subgroup' ? Formula: M6-7[Al8-9Si27-28O72] · nH2O Colour: white Description: "Small white crystals of what seems to be stilbite were obtained from the axinite cavity in Marlborough, though they have not been positively identified." Schooner (1958) |
ⓘ Titanite Formula: CaTi(SiO4)O Colour: light brown Description: "A few light brown crystals were found with the axinite at Marlborough." Schooner (1961) |
ⓘ Tremolite Formula: ◻Ca2Mg5(Si8O22)(OH)2 Colour: white Description: "A few white crystals have been seen at…the cut on Route 2 in Marlborough where axinite was found" Schooner (1958) |
ⓘ Wollastonite ? Formula: Ca3(Si3O9) Habit: flattened Colour: gray Description: "Robert Gallant found a few flattened gray crystals in the axinite pocket in Marlborough; the author is inclined to consider them wollastonite." Schooner (1958) |
ⓘ Zoisite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) Habit: columnar, divergent Colour: tan or light brown Description: "A tan or light brown columnar mineral, with a somewhat divergent habit, was intimately associated with axinite, prehnite, and various other materials, in the remarkable cavity at the cut along Route 2 in Marlborough; although it has not been positively identified as yet, the author believes it to be zoisite." Schooner (1958. "optically confirmed" Schooner (1961) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
ⓘ | Anhydrite ? | 7.AD.30 | CaSO4 |
Group 9 - Silicates | |||
ⓘ | Staurolite | 9.AF.30 | Fe2+2Al9Si4O23(OH) |
ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
ⓘ | Axinite-(Fe) | 9.BD.20 | Ca2Fe2+Al2BSi4O15OH |
ⓘ | Zoisite | 9.BG.10 | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
ⓘ | Tremolite | 9.DE.10 | ◻Ca2Mg5(Si8O22)(OH)2 |
ⓘ | Wollastonite ? | 9.DG.05 | Ca3(Si3O9) |
ⓘ | Prehnite | 9.DP.20 | Ca2Al2Si3O10(OH)2 |
ⓘ | Laumontite | 9.GB.10 | CaAl2Si4O12 · 4H2O |
Unclassified | |||
ⓘ | 'Scapolite' | - | |
ⓘ | 'K Feldspar var. Adularia' | - | KAlSi3O8 |
ⓘ | 'Stilbite Subgroup' ? | - | M6-7[Al8-9Si27-28O72] · nH2O |
ⓘ | 'Monazite' ? | - | REE(PO4) |
ⓘ | 'Chlorite Group' | - | |
ⓘ | 'Chabazite' | - | |
ⓘ | 'K Feldspar' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
H | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
H | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
H | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
H | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
H | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
H | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
B | Boron | |
B | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
O | Oxygen | |
O | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
O | ⓘ Anhydrite | CaSO4 |
O | ⓘ Diopside | CaMgSi2O6 |
O | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
O | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
O | ⓘ Monazite | REE(PO4) |
O | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
O | ⓘ Quartz | SiO2 |
O | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
O | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
O | ⓘ Titanite | CaTi(SiO4)O |
O | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
O | ⓘ Wollastonite | Ca3(Si3O9) |
O | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
Mg | Magnesium | |
Mg | ⓘ Diopside | CaMgSi2O6 |
Mg | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Al | Aluminium | |
Al | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
Al | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
Al | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
Al | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
Al | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Al | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
Al | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
Si | Silicon | |
Si | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
Si | ⓘ Diopside | CaMgSi2O6 |
Si | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
Si | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
Si | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Si | ⓘ Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
Si | ⓘ Titanite | CaTi(SiO4)O |
Si | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Si | ⓘ Wollastonite | Ca3(Si3O9) |
Si | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
P | Phosphorus | |
P | ⓘ Monazite | REE(PO4) |
S | Sulfur | |
S | ⓘ Anhydrite | CaSO4 |
K | Potassium | |
K | ⓘ K Feldspar var. Adularia | KAlSi3O8 |
Ca | Calcium | |
Ca | ⓘ Anhydrite | CaSO4 |
Ca | ⓘ Diopside | CaMgSi2O6 |
Ca | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
Ca | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
Ca | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
Ca | ⓘ Titanite | CaTi(SiO4)O |
Ca | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
Ca | ⓘ Wollastonite | Ca3(Si3O9) |
Ca | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
Ti | Titanium | |
Ti | ⓘ Titanite | CaTi(SiO4)O |
Fe | Iron | |
Fe | ⓘ Axinite-(Fe) | Ca2Fe2+Al2BSi4O15OH |
Fe | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Ganderia DomainDomain
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