美国的黄石公园是一个神秘美丽的地方,许多旅游者都为它着迷。它是世界上第一个原始公园,也是美国第一个国家公园,更是一个奇特的地质公园,它那独特的地貌是由火山喷发而形成的。大约60万年前,几平方千米的中心区域发生火山爆发,在很短的时间内,几千平方千米的地表被炸开而形成了如今的黄石公园。剧烈的火山喷发再加上黄石河的侵蚀, Yellowstone Park in the United States is a mysterious and beautiful place, many tourists are fascinated by it. It is the first original park in the world and the first national park in the United States. It is also a peculiar geological park whose unique landform was erupted by volcanoes. About 600,000 years ago, volcanic eruptions took place in the central areas of a few square kilometers. Within a very short time, thousands of square kilometers of surface were exploded to form today’s Yellowstone Park. Dramatic volcanic eruption coupled with the erosion of the Yellowstone River,