He discovered Silurian fossils in the highly altered rocks of the Bergen region; and in 1891 he called attention to a Palaeozoic glacial origin in the Varanger Fjord, a view confirmed by A . Strahan in 1896, who found glacial striations on the rocks beneath the ancient boulder-bed.
22.
Widespread distribution of Permo-Carboniferous glacial sediments in South America, Africa, Madagascar, Arabia, India, Antarctica and Australia was one of the major pieces of evidence for the theory of continental drift . The continuity of glaciers, inferred from oriented glacial striations and deposits called tillites, suggested the existence of the supercontinent of Gondwana, which became a central element of the concept of continental drift . Striations indicated glacial flow away from the equator and toward the poles, based on continents'current positions and orientations, and supported the idea that the southern continents had previously been in dramatically different locations, as well as being contiguous with each other.
