Читать книгу Hike the Parks Sequoia-Kings Canyon National Parks - Scott Turner - Страница 12

The story of the Sierra Nevada begins with plate tectonics. Plate tectonics theory describes the earth’s crust as a series of large moving plates that continually bump and grind against each other. This bumping and grinding shapes the surface of the earth by thrusting mountains upward, dragging valleys downward, and creating subterranean volcanic activity that creates the rocks that sometimes make their way to the earth’s surface.