This Acasta gneiss is a sample of the oldest known rock in the world. It was found in north-west Canada and is approximately 4 billion years old,...
lewisian gneiss, some of the oldest rocks in the world at a small beach at achmelvich - gneis stock-fotos und bilder
aerial view of the russell glacier near kangerlussuaq at sunset, front view the top of the glacier, qinnguata kuussua river, greenland ice sheet, icecap, qeqqata municipality, greenland - gneis stock-fotos und bilder
Outcrop of gneissic rock almost 40 feet high. Handcoloured copperplate engraving from Gottlieb Tobias Wilhelm's Unterhaltungen aus der...