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Milliau Island, Trébeurden, Côtes-d'Armor, Brittany, France

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Latitude & Longitude (WGS84): 48° 46' 4'' North , 3° 35' 43'' West
Latitude & Longitude (decimal): 48.76784,-3.59532
GeoHash:G#: gbtmqjvvr
Locality type:Island
Age:300 MY (for the granite intrusio Ma
Geologic Time:Pennsylvanian
Köppen climate type:Cfb : Temperate oceanic climate
Name(s) in local language(s):Île Milliau, Trébeurden, Côtes-d'Armor, Bretagne, France

An island on the coast of Trébeurden, only accessible at low tide (take care!). The northern part is formed by the "granite rose" (pink granit) of Ploumanac'h, and the southern part by sedimentary rocks of unknown age. These are varves, with a well developed layer structure. Near the contact, the felsic layers of the varves underwent contact metamorphosis, resulting in the forming of cordierite, andalousite and sillimanite.

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5 valid minerals.

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Pierrick Graviou "Géotourisme en Côtes-d'Armor", Société Géologique et Minéralogique de Bretagne, 2012, 96 pages

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