Alpine Geosyncline

…Earth’s crust known as the Alpine geosyncline, dating from the late Oligocene Epoch (about 25 million years ago), and the region thus reflects some of the same structural characteristics as the younger mountains of Europe. Northern and central Ciscaucasia have a platformlike construction, with a foundation of folded structures dating…

…Earth’s crust known as the Alpine geosyncline, dating from the late Oligocene Epoch (about 28 to 23 million years ago), and the region thus reflects some of the same structural characteristics as the younger mountains of Europe.