|Name in Malagasy:||Ambolo, Kaominin'i Marososona, Distrikan' Antsirabe II, Vakinankaratra, Madagasikara|
|Latitude & Longitude (WGS84):||20° 7' 35'' South , 46° 55' 3'' East|
|Latitude & Longitude (decimal):||-20.12663,46.91756|
|Köppen climate type:||Cwb : Subtropical highland climate or temperate oceanic climate with dry winters|
|Other/historical names associated with this locality:||Sahatany pegmatite field|
The locality Ambolo is known for its large groups of rock crystal (quartz) that is found here in large cavities in hydrothermal veins in quartzite. The crystals can be as long as 20 cm and shows usually dauphiné habitus. The Ambolo locality is located 800m NNE of the village with the same name, W of Mt. Kiboy in the western part of the Sahatany pegmatite Field, SW of the town Antsirabe in the main highland of Madagascar.
Regions containing this locality
|Somali Plate (Somalia Plate)||Plate|
|Antananarivo Province, Madagascar||Province (Abolished)|
|Sahatany Pegmatite Field (Mt Ibity area), Madagascar||Pegmatite Field|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
2 valid minerals.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Detailed Mineral List:
List of minerals arranged by Strunz 10th Edition classification
|Group 4 - Oxides and Hydroxides|
List of minerals arranged by Dana 8th Edition classification
|Group 4 - SIMPLE OXIDES|
|Group 75 - TECTOSILICATES Si Tetrahedral Frameworks|
|Si Tetrahedral Frameworks - SiO2 with  coordinated Si|
List of minerals for each chemical element
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 Macrostrat.org
|Ectasian - Calymmian|
1200 - 1600 Ma
|Mesoproterozoic sedimentary rocks|
Age: Mesoproterozoic (1200 - 1600 Ma)
Lithology: Sedimentary 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. 
2050 - 2300 Ma
Age: Rhyacian (2050 - 2300 Ma)
Lithology: Plutonic and metamorphic
Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM.