01388cam a2200313 4500 124565314 TxAuBib 20130102120000.0 800117s1979||||||||||||||||||||||||eng|u 79002714 9780917304101 0917304101 DLC eng DLC OCL BAKER BTCTA YDXCP OCLCG OCLCA GBVCP OCLCO ZPK TxAuBib Allen, John Eliot, 1908-1996. The magnificent gateway : a layman's guide to the geology of the Columbia River Gorge / by John Eliot Allen. Forest Grove, Or. : Timber Press, 1979. xii, 144 p. : ill. ; 22 cm. Scenic trips to the Northwest's geologic past ; 1 Scenic trips to the Northwest's geologic past ; no. 1 Includes index. 20130102. Geology Columbia River Gorge (Or. and Wash.) Guidebooks. Columbia River Gorge (Or. and Wash.) Guidebooks. Geology Columbia River Gorge (Or. and Wash.) Guidebooks. Columbia River Gorge (Or. and Wash.) Guidebooks. Allen, John Eliot, 1908-, Forest Grove, Or. : Timber Press, 1979. Scenic trips to the Northwest's geologic past ; 1. Scenic trips to the Northwest's geologic past ; no. 1.