The nomads who made these markings lived by hunting and fishing during the last Ice Age, which began about 35,000 B.C. and ended about 10,000 B.C.

• 这些痕迹是游牧人留下的，他们生活在从公元前约35，000年到公元前10，000处的冰川期的末期，以狩猎、捕鱼为生。