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From Sea to Shining Sea
Mountains Into Sand
Rivers Carve the Land
10 other sections not shown
Appalachian Mountains Appalachian Plateau Basin began bottom boulders broken pieces called changed cliff Colorado Plateau continent covered cracks crumbled rock crust debris decayed deep deeper delta desert floor dissolved earthquake edge farther faults feet flat flood flowing folds formed geosynclines glaciers grains of sand Grand Canyon granite ground grow Gulf Gulf of California happen hard highlands hills ice sheet igneous rock inside the earth kinds of rock lake land landscape lava layers of rock look magma mass of magma melted metamorphic rock miles million years ago minerals Mississippi Mississippi River molten moraines moun mountain ranges moving nearly level plain ocean once peaks places plants rain ridges Rocky Mountains rubble sand and silt sandstone scientists sediment sedimentary rock seen seeped side streams slopes slowly smaller snow soil solid rock squeezed stand steep stone surface thick USGS photo valleys volcanoes Wasatch Mountains washed wearing West western worn