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Antsohamamy labradorite quarry, Fotadrevo, Ampanihy, Atsimo-Andrefana, Madagascari
Regional Level Types
Antsohamamy labradorite quarryQuarry

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Name in Malagasy:Karieran' Antsohamamy, Kaominin'i Fotadrevo, Distrikan' Ampanihy, Faritr' Atsimo Andrefana, Madagasikara
Latitude & Longitude (WGS84): 23° 53' 12'' South , 45° 9' 43'' East
Latitude & Longitude (decimal): -23.88677,45.16203
GeoHash:G#: m5b05etcr
Locality type:Quarry
Köppen climate type:Aw : Tropical savanna, wet

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

Regions containing this locality

Somali Plate (Somalia Plate)Tectonic Plate
Tuléar Province (Toliara), MadagascarProvince

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

1 valid mineral.

Detailed Mineral List:

Formula: Ca(Al2Si2O8)
Reference: pers. com. K.E.Larsen april 2006
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Reference: pers. com. K.E.Larsen april 2006

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates

List of minerals arranged by Dana 8th Edition classification

Unclassified Minerals, Mixtures, etc.

List of minerals for each chemical element

O Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
O AnorthiteCa(Al2Si2O8)
Na Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Al Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Al AnorthiteCa(Al2Si2O8)
Si Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Si AnorthiteCa(Al2Si2O8)
Ca Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Ca AnorthiteCa(Al2Si2O8)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Ectasian - Calymmian
1200 - 1600 Ma

ID: 3184647
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1200 - 1600 Ma)

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

2050 - 2300 Ma

ID: 3306489

Age: Rhyacian (2050 - 2300 Ma)

Lithology: Metamorphic

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on 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 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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