秘鲁南部城市库斯科西北120公里的地方,有一个名叫马丘皮丘的印加帝国的历史古城,它建筑于被悬崖绝壁包围的花岗岩山脊上,整个城市海拔2500米,被云雾所笼罩,与世隔绝,是一个神秘的圣地,也是历史上著名的印加人的“空中城市”。最近,美国耶鲁大学地质实验室的古登与罗德雷奇两位学者,在 Located 120 km northwest of Cusco in the southern Peruvian city of Cuzco, there is an ancient city of the Inca empire known as the Machu Picchu, built on a granite ridge surrounded by cliffs and walls, the city at an altitude of 2,500 meters, enveloped by clouds, Isolated from the world, is a mysterious holy place, also known as the Inca “sky city”. Recently, two scholars, Goodden and Rodrechts, of the Geological Laboratory at Yale University in the United States