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火与冰的洗礼 黄石公园不仅水热活动精彩纷呈,它那壮美的高峡平湖以及由森林、草地和野生动物组成的自然景观更加引人入胜。这些景观的塑造,是自然界亿万年的演化结果。 黄石公园最古老的岩石已经形成25亿年了,这些强变质的片岩和片麻岩所组成的原始山体经历了长期的风风雨雨,到5亿年前后被夷为平原并下沉,经受了一次又一次的海水入侵,在早期海床上堆积的砂页岩中可以找到古老的单细胞生物化石,以后又有多种无脊椎动物化石。大约2亿多年前,海床隆升成陆,一批恐龙出现在海边的森林和沼泽地中。6500万年前后,新生代的第一期造山运
Baptism of Fire and Ice Not only is the water and heat activity spectacular, its magnificent High Gapy Lake and the natural landscape of forests, meadows and wildlife make it even more spectacular. The shaping of these landscapes is the result of hundreds of millions of years of evolution in nature. The oldest rocks in Yellowstone have been formed for 2.5 billion years and the primitive mountains of these metamorphic schist and gneiss have experienced prolonged ups and downs and have been flattened and subsided 500 million years ago Once again seawater invaded, ancient single-celled fossils can be found in sand-shale piled up in the early seabed, and many later invertebrate fossils. About 200 million years ago, the sea bed rose into land, a group of dinosaurs appeared in the seaside forests and marshes. 65 million years ago, the first generation of the new generation of mountain or mountain transport