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落基山脉占北美大陆西部大高原体系的大部地区.整体而言,落基山系所包含的各条山脉从亚伯达省北部和不列颠哥伦比亚省向南延伸,经美国西部至墨西哥边境,全长约4,800公里。界线大多不易确定,尤其是西北边远地区,经常将阿拉斯加的布鲁克斯山脉归入落矶山系.这里有终年积雪的山峰、茂密的针叶森林、宽广的山谷、清澈的溪流、开阔的天空和丰富的矿藏资源.大部分山脉平均海拔达2000到3000 米,有的甚至超过了4000 米,如埃尔伯特峰高达4399 米,加尼特峰高达4202 米,布兰卡峰高达4365米.
Earth, a unique planet, restless and dynamic, continents shift and clash, volcanoes erupt, glaciers grow and recede, titanic forces that are constantly at work, leaving a trail of geological mysteries behind.
In this episode, we investigate the formation of the Rockies, the North American mountain range shrouded in mystery, flanked by huge slabs of rocks with ancient sea fossils buried high in its slopes, and crowned by jagged peaks that geologists believe were once double the height they are today. Scientists piecing together their story, uncover evidence of 1 ice sheets, collapsing mountains and explosive volcanic eruptions. A geological history that brings us one step closer to understanding HOW THE EARTH WAS MADE.
The Rockies, a 2 mountain range, towering high above the American West. It's the longest chain in North America, and the third longest in the world, stretching over 3,000 miles, from New Mexico, through Colorado, Wyoming and Montana, and north into Canada.
For decades, geologists have been puzzled about how this giant mountain range rose from the plains. The investigation begins with a specific type of rock.
"Here we are, in the heart of the Rocky Mountains; we're in an amazing place to begin with. And right here, at Red Rocks, we're in the midst of an amphitheatre of rock."
Thirteen miles west of Denver, Colorado, two 300-foot-high sandstone monoliths slope 45 degrees into the sky, each is taller than Niagara Falls. Together they form the walls of a unique musical venue.
课后题目: 学习完后，你能告诉我文章中空缺的单词吗？
