ScouredThis rock is one of many granitic rocks, often metamorphosed, found on the southwestern coast
ScouredThis rock is one of many granitic rocks, often metamorphosed, found on the southwestern coast of Sweden. These rocks are exposed at Holländaröd, Lysekil Municipality. The rocks are Proterozoic aged; isotope dating the rocks shows that they’re about 1.6 billion years old. They formed by subduction along the edge of what is today the Baltic shield; a piece of continental crust that today represents most of Scandinavia and part of the core of Europe. Glaciers that formed over Scandinavia repeatedly during the last million years, including during the last ice age that ended about 10,000 years ago, scoured the lines on the rocks.-JBBImage credit: https://commons.wikimedia.org/wiki/File:Smooth_granite_cliff_at_Holländaröd.jpgReferences:http://www.iaea.org/inis/collection/NCLCollectionStore/_Public/18/081/18081845.pdfhttps://foreninger.uio.no/ngf/ngt/pdfs/NGT_74_2_114-126.pdfhttp://www-markinfo.slu.se/eng/soildes/berggr/bgkarta.html -- source link
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