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Idyll in Nåtö, Åland, Finnland
Die rosa Steine am Ufer sind Rapakiwi-Granit (mit Einsprengseln von verschiedenen Feldspat-Arten). Der Name kommt vom finnischen Wort rapakivi, was Bröckelstein bzw. schlechter Stein bedeutet. Die åländischen Straßen sind vor allem aus diesem Gestein und deshalb rosa.
Rapakivi granite is a hornblende-biotite granite containing large round crystals of orthoclase each with a rim of oligoclase (a variety of plagioclase). The name has come to be used most frequently as a textural term where it implies plagioclase rims around orthoclase in plutonic rocks. Rapakivi is Finnish for "crumbly rock", because the different heat expansion coefficients of the component minerals make exposed rapakivi crumbly. ... (Wikipedia)
... Åland's roads are made of rapakivi granite and therefore are pink
Idyll in Nåtö, Åland, Finnland
Die rosa Steine am Ufer sind Rapakiwi-Granit (mit Einsprengseln von verschiedenen Feldspat-Arten). Der Name kommt vom finnischen Wort rapakivi, was Bröckelstein bzw. schlechter Stein bedeutet. Die åländischen Straßen sind vor allem aus diesem Gestein und deshalb rosa.
Rapakivi granite is a hornblende-biotite granite containing large round crystals of orthoclase each with a rim of oligoclase (a variety of plagioclase). The name has come to be used most frequently as a textural term where it implies plagioclase rims around orthoclase in plutonic rocks. Rapakivi is Finnish for "crumbly rock", because the different heat expansion coefficients of the component minerals make exposed rapakivi crumbly. ... (Wikipedia)
... Åland's roads are made of rapakivi granite and therefore are pink