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Marovato, Ambolobozo, Analalava District, Sofia Region, Mahajanga Province (Majunga), Madagascar

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Latitude & Longitude (WGS84): 14° 24' 18'' South , 47° 42' 51'' East
Latitude & Longitude (decimal): -14.40500,47.71417
Köppen climate type:Aw : Tropical savanna, wet
Name(s) in local language(s):Marovato, Ambolobozo, Distrikan' i Analalava, Faritra Sofia, Faritanin' i Mahajanga, Madagasikara

The famous locality for the "Ocean Jasper".
Located on the north-east coast of Madagascar near the village of Marovato where orbicular quartz is mined that is polished and/or carved and sold as "Ocean Jasper".

Mineral List

1 valid mineral.

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

66 - 145 Ma

ID: 3193248
Mesozoic sedimentary and volcanic rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Mafic volcanic 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]

Late Cretaceous
66 - 100.5 Ma

ID: 3306913

Age: Late Cretaceous (66 - 100.5 Ma)

Lithology: Volcanic

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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Lieber, W. (2003): Sphärolithischer Chalcedon von Madagaskar. LAPIS 28 (9), 18-22

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