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Porter Hill Road roadcut, Long Hill, Trumbull, Fairfield County, Connecticut, USAi
Regional Level Types
Porter Hill Road roadcutRoad Cutting
Long HillHill
TrumbullTown
Fairfield CountyCounty
ConnecticutState
USACountry

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Latitude & Longitude (WGS84):
41° 17' 18'' North , 73° 12' 39'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Nearest Settlements:
PlacePopulationDistance
Trumbull36,018 (2017)5.1km
Easton7,625 (2017)8.2km
Shelton41,296 (2017)10.3km
Derby12,700 (2017)10.8km
Ansonia18,854 (2017)12.7km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Danbury Mineralogical SocietyDanbury, Connecticut23km
New Haven Mineral ClubNew Haven, Connecticut24km
Stamford Mineralogical SocietyStamford, Connecticut38km
Lapidary and Mineral Society of Central ConnecticutMeriden, Connecticut44km
Bristol Gem & Mineral ClubBristol, Connecticut48km
Mindat Locality ID:
217039
Long-form identifier:
mindat:1:2:217039:1
GUID (UUID V4):
12802675-84f1-4aab-9fef-5fdb338a04b7


Porter Hill Road (about 1250 m east of the center of Old Mine Park) road cut topaz locality discovered by Ethel Sullivan September 1936, with specimens collected by Earle Sullivan in June 1938. The exact locality was not recorded, so the coordinates are for the steep part of the road near the south end that likely intersected bedrock.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


4 valid minerals.

Detailed Mineral List:

β“˜ Fluorite
Formula: CaF2
Habit: massive
Colour: clear, reddish, purple
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: tabular
Colour: silver
β“˜ Quartz
Formula: SiO2
Habit: massive
Colour: clear
β“˜ Topaz
Formula: Al2(SiO4)(F,OH)2
Habit: Prismatic with pyramidal terminations
Colour: pale gray-green to pale honey-brown
Description: Mostly massive, but some good (but small (<1 cm)) terminated crystals enclosed in massive fluorite.

Gallery:

Al2(SiO4)(F,OH)2β“˜ Topaz

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
β“˜Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
β“˜Quartz4.DA.05SiO2
Group 9 - Silicates
β“˜Topaz9.AF.35Al2(SiO4)(F,OH)2
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2

List of minerals for each chemical element

HHydrogen
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ TopazAl2(SiO4)(F,OH)2
OOxygen
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ TopazAl2(SiO4)(F,OH)2
FFluorine
Fβ“˜ FluoriteCaF2
Fβ“˜ TopazAl2(SiO4)(F,OH)2
AlAluminium
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ TopazAl2(SiO4)(F,OH)2
SiSilicon
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ TopazAl2(SiO4)(F,OH)2
KPotassium
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ FluoriteCaF2

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.

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