Unnamed magnetite occurrences, Higganum, Haddam, Middlesex County, Connecticut, USAi
Regional Level Types | |
---|---|
Unnamed magnetite occurrences | Group of Occurrences |
Higganum | - not defined - |
Haddam | - not defined - |
Middlesex County | County |
Connecticut | State |
USA | Country |
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Latitude & Longitude (WGS84):
41° 29' 56'' North , 72° 33' 20'' West
Latitude & Longitude (decimal):
Type:
Group of Occurrences
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Higganum | 1,698 (2017) | 0.2km |
Moodus | 1,413 (2017) | 8.8km |
East Haddam | 9,042 (2017) | 9.4km |
East Hampton | 2,691 (2017) | 9.6km |
Middletown | 46,756 (2017) | 10.6km |
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 | 21km |
New Haven Mineral Club | New Haven, Connecticut | 38km |
Bristol Gem & Mineral Club | Bristol, Connecticut | 38km |
Mindat Locality ID:
214538
Long-form identifier:
mindat:1:2:214538:2
GUID (UUID V4):
9a7ebf46-9c20-4310-8161-c5e450bf451d
Numerous small, common, unzoned pegmatites with pink to reddish microcline cross-cut the Pond Meadow gneiss portion of what was called the Monson gneiss in the Higganum area. Natural and man-made exposures are too numerous to list. Some of these pegmatites contain magnetite crytals, but little else of interest. The crystals are octahedral to dodecahedral and deeply striated and can reach 2 to 3 cm.
Davis (1901) states that magnetite:
...occurs in octahedrons with truncated edges, on the summit of a hill on Crookβs Lane, Walkley Hill district, about one mile from the [old Middlesex County] turnpike. These crystals are quite abundant here and well formed, varying in size from ΒΌ to 1 ΒΌ inches. Magnetite is also met with in other parts of the town in ledges and boulders, but this locality is by far the most prolific.
They have been noted by Foye (1922) in Higganum Creek west of Depot Road:
In the bed of the brook north of the village of Higganum (Locality 14) well formed magnetite crystals occur in red pegmatite in the Haddam [Monson] gneiss. The occurrence is only interesting in that such perfect crystals of magnetite are rare in the district.
and by Williams (1945) on Ladderpole Hill between Higganum and Haddam center (an area similar to that described by Davis (1901)).
Map reference coordinates are for the Higganum Creek locality.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
β Albite Formula: Na(AlSi3O8) Colour: white to tan Description: By sampling and analyzing many pegmatites in the Middletown district, Stugard (1958) established that the plagioclase in them is albite. References: |
β Annite Formula: KFe2+3(AlSi3O10)(OH)2 Colour: black Description: fka biotite References: |
βͺ Magnetite Formula: Fe2+Fe3+2O4 Habit: Striated octahedrons to dodecahedrons Colour: metallic gray to black Description: Typically coated with a thin layer of muscovite that can be carefully removed. |
β Microcline Formula: K(AlSi3O8) Colour: pink to reddish Description: By sampling and analyzing many pegmatites in the Middletown district, Stugard (1958) established that the K-feldspar in them is microcline. References: |
β Muscovite Formula: KAl2(AlSi3O10)(OH)2 Colour: silvery Description: Typically coats the magnetite crystals. References: |
β Quartz Formula: SiO2 Colour: gray References: |
β Quartz var. Smoky Quartz Formula: SiO2 Colour: gray References: |
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
β | Quartz | 4.DA.05 | SiO2 |
β | var. Smoky Quartz | 4.DA.05 | SiO2 |
Group 9 - Silicates | |||
β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
β | Annite | 9.EC.20 | KFe2+3(AlSi3O10)(OH)2 |
β | Microcline | 9.FA.30 | K(AlSi3O8) |
β | Albite | 9.FA.35 | Na(AlSi3O8) |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Annite | KFe32+(AlSi3O10)(OH)2 |
H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
O | Oxygen | |
O | β Albite | Na(AlSi3O8) |
O | β Annite | KFe32+(AlSi3O10)(OH)2 |
O | β Magnetite | Fe2+Fe23+O4 |
O | β Microcline | K(AlSi3O8) |
O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
O | β Quartz | SiO2 |
O | β Quartz var. Smoky Quartz | SiO2 |
Na | Sodium | |
Na | β Albite | Na(AlSi3O8) |
Al | Aluminium | |
Al | β Albite | Na(AlSi3O8) |
Al | β Annite | KFe32+(AlSi3O10)(OH)2 |
Al | β Microcline | K(AlSi3O8) |
Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | Silicon | |
Si | β Albite | Na(AlSi3O8) |
Si | β Annite | KFe32+(AlSi3O10)(OH)2 |
Si | β Microcline | K(AlSi3O8) |
Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | β Quartz | SiO2 |
Si | β Quartz var. Smoky Quartz | SiO2 |
K | Potassium | |
K | β Annite | KFe32+(AlSi3O10)(OH)2 |
K | β Microcline | K(AlSi3O8) |
K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Fe | Iron | |
Fe | β Annite | KFe32+(AlSi3O10)(OH)2 |
Fe | β Magnetite | Fe2+Fe23+O4 |
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Ganderia DomainDomain
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