Cynthia Light Brown's Geology of the Pacific Northwest: Investigate How the Earth PDF

By Cynthia Light Brown

ISBN-10: 1936749858

ISBN-13: 9781936749850

Venturing via of the main assorted and interesting areas of North the US, those task books mix the topics of geology and actual geography whereas making them fascinating and enjoyable. With a unique process, this sequence unearths the underlying methods for children, explaining every one region's evolution and illustrating the several forces of nature that experience replaced the continent over the years. the luxurious forests of the Pacific Northwest, the dry and arid deserts of the Southwest, or even the volcanoes and rainforests of Hawaii are all explored intimately because the chapters chronicle the consequences of plate tectonics; landforms akin to mountains, plateaus, and canyons; and the weather of climates and ecosystems. A plethora of hands-on initiatives make sure the studying strategy is either enticing and interesting, together with creating a swamp cooler, making a rift sector, construction a seismograph, developing basalt columns and water wheels to harness the ability of a river, fashioning relocating tectonic plates, or even mimicking nature's strategy of carving an arch.

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Additional resources for Geology of the Pacific Northwest: Investigate How the Earth Was Formed with 15 Projects

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50 Basins and Plateaus • The Columbia River Basalts are the youngest flood basalts on earth. This means they have experienced less erosion than other flood basalts. As a result, these basalts have been studied more than any other flood basalts in the world. • The lava erupted between 17 million and 6 million years ago. Most of the eruptions occurred in the first 1½ million years of that period. What Causes Flood Basalts? Flood basalts are unusual. They only occur about once every 50 million years or so, and they don’t usually happen near plate boundaries.

U-Shaped Valley: River valleys are V-shaped, from the river slowly cutting into the rock. Glaciers follow the path of rivers because, like rivers, they are seeking the fastest way downhill. But glaciers are wider, and the rocks they carry carve out a valley with a “U” shape. Hanging Valley: When a smaller glacier in a side canyon feeds into a larger glacier, the smaller glacier doesn’t cut as deeply as the larger glacier. After they melt, the smaller glaciers leave behind smaller valleys high up on the mountainsides that look like they’re hanging.

Di dY ou The Coast Mountains farther south extend down along the coast of Alaska and Canada. Some of these huge mountains are only 10 miles from the ocean (16 kilometers). All mountains erode, which keeps them from getting too high, but moving tectonic plates are pushing the Coast Mountains higher more quickly than they’re being eroded. As a result, they are the tallest coastal mountains in the world. Know? The Coastal Mountains in Alaska are so rugged that you often cannot travel by road from one community to another.

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