Bøger af David Alt

California�s geology makes headlines when faults shift, volcanoes puff steam, and coastal bluffs fall into the sea. The latest edition of this popular book explores the state�s recent rumblings and tremulous past with the aid of full color illustrations. Spectacular photographs showcase multihued rock, from red chert and green serpentinite to blue schist and gray granite. The color geologic road maps, based on the 2010 Geologic Map of California, are detailed and easy to read. The geologic information, particularly for the Klamath Mountains, Modoc Plateau, and northern Sierra Nevada, has been updated to reflect the more recent geologic understanding of these complex areas. For your next road trip, replace your tattered, dog-eared copy of the old edition with this gorgeous new volume.

As geologist J. Harlen Bretz walked the dry scabland channels of eastern Washington in the 1920s, it dawned on him that he was viewing a landscape sculpted by water. Lots of water. A flood of catastrophic proportions. Glacial Lake Missoula and Its Humongous Floods tells the gripping tale of a huge Ice Age lake that drained suddenly--not just once but repeatedly--and reshaped the landscape of the Northwest. The narrative follows the path of the floodwaters as they raged from western Montana across the Idaho Panhandle, then scoured through eastern Washington and down the Columbia Gorge to the Pacific Ocean. This is also the story of geologists grappling with scientific controversy--"of how personalities, pride, and prejudice sometimes superseded scientific evidence."