America's naitonal monuments: legacy of the great plains: geologic wonders of the norhtern plainsPublished by : Ambrose Video Publishing (New York) Physical details: 30 mins. ; color.
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AIT 美國資料中心 AIT American Center
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Since 1906, each National Monument in American has been designed by the sitting President as a personal memorial of a parcel that he deemed deserving of preservation for future generations. America's National Monuments tell the story of the nation's past and present glory. In Legacy of the Great Plains we will visit the 10 monuments associated with America once vast grasslands. VOLUME ONE: GEOLOGIC WONDERS OF THE NORTHERN PLAINS. The geology of the Great Plains is a product of long epochs of sedimentary buildup followed by equally long epochs of erosion. The result today is a dramatic landscape of bluffs, pinnacles and badlands that contain the rich story, of ancient sea creatures, dinosaurs and long extinct, giant land mammals. But it was the rising up of the Black Hills in the vast Great Plains that created incredibly dramatic geological features. This volume contains three chapters: Devils tower national monument, Jewel Cave National Monument, Agate Fossil Beds National Monument.