Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Unnamed magnetite occurrences, Higganum, Haddam, Middlesex County, Connecticut, USAi
Regional Level Types
Unnamed magnetite occurrencesGroup of Occurrences
Higganum- not defined -
Haddam- not defined -
Middlesex CountyCounty
ConnecticutState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
41° 29' 56'' North , 72° 33' 20'' West
Latitude & Longitude (decimal):
Type:
Group of Occurrences
KΓΆppen climate type:
Nearest Settlements:
PlacePopulationDistance
Higganum1,698 (2017)0.2km
Moodus1,413 (2017)8.8km
East Haddam9,042 (2017)9.4km
East Hampton2,691 (2017)9.6km
Middletown46,756 (2017)10.6km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut21km
New Haven Mineral ClubNew Haven, Connecticut38km
Bristol Gem & Mineral ClubBristol, Connecticut38km
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 Crook’s 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 Elements

Mineral List


6 valid minerals.

Detailed 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
βœͺ 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.
β“˜ Quartz
Formula: SiO2
Colour: gray
β“˜ Quartz var. Smoky Quartz
Formula: SiO2
Colour: gray

Gallery:

Fe2+Fe3+2O4β“˜ Magnetite

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
β“˜Magnetite4.BB.05Fe2+Fe3+2O4
β“˜Quartz4.DA.05SiO2
β“˜var. Smoky Quartz4.DA.05SiO2
Group 9 - Silicates
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Annite9.EC.20KFe2+3(AlSi3O10)(OH)2
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Albite9.FA.35Na(AlSi3O8)

List of minerals for each chemical element

HHydrogen
Hβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Oβ“˜ MagnetiteFe2+Fe23+O4
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ Quartz var. Smoky QuartzSiO2
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ Quartz var. Smoky QuartzSiO2
KPotassium
Kβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
FeIron
Feβ“˜ AnniteKFe32+(AlSi3O10)(OH)2
Feβ“˜ MagnetiteFe2+Fe23+O4

Other Regions, Features and Areas containing this locality


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

 
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are Β© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: March 29, 2024 15:29:24 Page updated: March 25, 2024 00:02:06
Go to top of page