Roadside Geology of WashingtonMountain Press Publishing Company, 1984 - 282 oldal The geology of Washington is a story of islands--micro-continents--coming in from the sea. Two hundred million years ago most of Washington consisted of two large islands, each one a scrap of continent, lying somewhere in the vastness of the Pacific Ocean. One after the other they docked onto the North American continent, each adding its distinctive bit to the complex geologic and geographic mosaic of western North America. --Amazon.com. |
Tartalomjegyzék
Introduction | 1 |
The Northeastern Highlands | 25 |
The North Cascade Subcontinent | 57 |
Copyright | |
4 további fejezet nem látható
Gyakori szavak és kifejezések
andesite basalt flows basalt lava flows basin batholith bedrock beneath Columbia Plateau Columbia River contain continental crust dark andesite deposits dunes east Ellensburg Eocene eroded erupted exposed exposures feet flood basalt folded formation geologic geologists call glacial debris Glacier Peak gneiss graben Grand Coulee granite magma gravel gray highway ice age Kootenay arc last ice age layers loess magma mantle melted metamorphic rocks miles million years ago Miocene Miocene plateau basalt Mount Baker Mount Rainier Mount St Mountains mudflows North America North American continent North Cascade North Cascade micro-continent North Cascade subcontinent ocean floor oceanic crust Okanogan subcontinent Okanogan trench Olympic Peninsula Palouse loess Pasco pillow basalts plate pluton Puget Sound lowland Republic graben rhyolite road roadcuts SAN DIEGO sand sandstone scablands sediment sedimentary rocks soil Spokane floods steam Straight Creek fault surface Swauk trench filling Wenatchee Western Cascades Willapa Hills Yakima