Back to album

Flechten auf Rapakiwi-Granit - Lichen on rapakivi granite

Storby, Eckerö, Åland, Finland;

 

Die rosa Steine 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.

1,102 views
30 faves
159 comments
Uploaded on October 4, 2019
Taken on May 31, 2019