Wonders of the National Parks: A Geology of North America
The Great Courses / Ford Cochran | Duration: 18 h 36 m | Video: H264 640×360 | Audio: AAC 44,1 kHz 2ch | 3,77 GB | Language: English | 2015
In 1872, a wondrous region called Yellowstone was set aside as the world’s first national park, giving adventurous travelers access to a geologist’s paradise that seethes with pent-up volcanic forces. As more and more national parks were created-not just in the United States but also in Canada and Mexico-geologists were revolutionizing their field, piecing together a detailed understanding of how the world works. National parks have made these magnificent reminders of the awe-inspiring power of our planet accessible to everyone. there is no better education in the remarkable forces that formed our world than a tour of the national parks of North America. These parks capture a special place in our hearts and draw millions of tourists each year.
From Yellowstone’s bubbling, steaming landscape to the great slabs of granite along Acadia’s shores, each park contributes its own chapter to the story of Earth. Most visitors get only a superficial view of these sites, guided by the informational signposts or tour books, but there is so much more to be discovered. Our national parks offer profound lessons for anyone who loves history, geology, and nature. This course provides in-depth insights, intriguing perspectives, and riveting little-known facts about these treasured places that you won’t find simply by driving through them. And the next time you do drive or hike through a national park, you’ll have a deeper appreciation for the forces-geological, historical, and otherwise-that shaped it.
You will learn how our majestic parks provide dramatic evidence of geological processes such as:
• Colliding continents: From Maine’s Acadia National Park to the Great Smoky Mountains of North Carolina and Tennessee, the rolling Appalachians are the eroded remnants of once-mighty peaks formed in the collision of ancient continents.
• Glaciation: The magnificent valley that welcomes visitors to Yosemite National Park is the work of vanished glaciers that were nearly a mile thick. Glaciers sculpted this region and much of North America in a succession of pulses during Earth’s latest ice age.
• Uplift and erosion: Imagine a board lifting into a buzz saw. A similar phenomenon produced the Grand Canyon and other breathtaking chasms in the American West, as the Colorado Plateau rose and fast-flowing rivers sliced through the land.
• Volcanic Hotspots: Deep beneath Yellowstone National Park is a huge magma chamber that erupted as a supervolcano 640,000 years ago and will explode again. Hawaii Volcanoes National Park hides a tamer, fiery hotspot.
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