The mountain ranges of Europe and Asia When the great land masses of Africa and India collide with Europe and Asia, about 100 million years ago, they cause the crust of the earth to crumple upwards in a long almost continuous ridge of high ground - from the Alps, through Turkey, Iran and Afghanistan to the Himalayas. This barrier will have a profound influence on human history. To the south and east of the mountain range are various fertile regions, watered by great rivers flowing from the…