Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Sentinel Peak ('A' Mountain) - SW side, Sentinel Peak area, Tucson, Amole Mining District, Tucson Mountains, Pima County, Arizona, USAi
Regional Level Types
Sentinel Peak ('A' Mountain) - SW side- not defined -
Sentinel Peak areaOccurrence
TucsonCity
Amole Mining DistrictMining District
Tucson MountainsMountain Range
Pima CountyCounty
ArizonaState
USACountry

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Latitude & Longitude (WGS84):
32° 12' 36'' North , 110° 59' 32'' West
Latitude & Longitude (decimal):
32.21025,-110.99234
GRN:
N22W67
Köppen climate type:
BSh : Hot semi-arid (steppe) climate
Nearest Settlements:
PlacePopulationDistance
South Tucson5,715 (2017)2.5km
Tucson531,641 (2017)6.3km
Drexel Heights27,749 (2011)8.4km
Flowing Wells16,419 (2011)9.4km
Tucson Estates12,192 (2011)9.6km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Old Pueblo Lapidary ClubTucson, Arizona6km
Tucson Gem and Mineral SocietyTucson, Arizona6km
Mindat Locality ID:
53995
Long-form identifier:
mindat:1:2:53995:8
GUID (UUID V4):
0


No description has been added for this locality. Can you add one?

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


1 valid mineral.

Detailed Mineral List:

ⓘ Anorthite
Formula: Ca(Al2Si2O8)
Description: Actually andesine-labradorite segment of the series. As phenocrysts to 2 inches (5 cm) in intrusive & flow porphyritic rocks, locally termed 'turkey-track porphyry.'
ⓘ Anorthite var. Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Description: Actually andesine-labradorite segment of the series. As phenocrysts to 2 inches (5 cm) in intrusive & flow porphyritic rocks, locally termed 'turkey-track porphyry.'

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘAnorthite9.FA.35Ca(Al2Si2O8)
ⓘvar. Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]

List of minerals for each chemical element

OOxygen
Oⓘ AnorthiteCa(Al2Si2O8)
Oⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
NaSodium
Naⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
AlAluminium
Alⓘ AnorthiteCa(Al2Si2O8)
Alⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
SiSilicon
Siⓘ AnorthiteCa(Al2Si2O8)
Siⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
CaCalcium
Caⓘ AnorthiteCa(Al2Si2O8)
Caⓘ Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]

Other Regions, Features and Areas containing this locality

Mexico
North AmericaContinent
North America PlateTectonic Plate

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

Cooper, J.R. (1961), Turkey-track porphyry - A possible guide for correlation of Miocene rocks in southeastern Arizona, Arizona Geological Society Digest: 4: 17-35.
Anthony, John W., Williams, Sidney A., Bideaux, Richard A., Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.). University of Arizona Press.pp.329-330
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