explaining the presence of nonvolcanic islands and island chains, according to Wegener. Where the moving pieces collided, mountains formed. They were thrust up either by the plowing of the continents through the sima, as in the case of the Andes, or by the colliding of two blocks of sial, ...
continents, particularly those found in boththe Americasand in Africa. Wegener’s theory of continental drift won some adherents in the ensuing decade, but his postulations of the driving forces behind the continents’ movement seemed implausible. By 1930 his theory had been rejected by most ...
explaining the presence of nonvolcanic islands and island chains, according to Wegener. Where the moving pieces collided, mountains formed. They were thrust up either by the plowing of the continents through the sima, as in the case of the Andes, or by the colliding of two blocks of sial, ...