登入選單

返回Google圖書搜尋

Some Recent Physical Changes of the Oregon Coast

Samuel Newton DickenBill HannesonCarl L. Johannessen

出版	Department of Geography, University of Oregon, 1961
URL	http://books.google.com.hk/books?id=0joIAQAAIAAJ&hl=&source=gbs_api

註釋

Some of the physical changes of the Oregon coast (from the California boundary to the Columbia River) which have occurred since settlement are discussed. Included are changes of the beaches and the immediate backshore, of the active dunes near the shore, and of the estuaries. Some discussion is of a more general nature, to place the specific studies in the proper perspective. The time span, arbitrarily chosen, is the period since white settlement, a little more than a century. This is the time for which historical records are available to document the nature of the changes. The purpose is to describe, measure, and explain some of the Oregon coast changes within the limitations of time and resources available. Special emphasis is placed on the beaches, dunes, and tidal marshes in the estuaries, where changes have occurred and are occurring. Many aspects of these three categories and many lines of investigation had to be left unstudied. (Author).