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Creator:: Oregon. Dept. of Geology and Mineral Industries, Boggs, Sam, and Hull, Donald A.
Resource Type:: Journal
Full Text:: - tite, muscovite, and rock fragments with a minor amount of clay minerals. %Minor replacement of

Creator:: Oregon. Dept. of Geology and Mineral Industries, Peterson, Norman V., and Groh, Edward A.
Abstract:: When you drive through the Madras region on U.S. Highway 97, you see a gently rolling plain dotted with low hills and flat-topped buttes. Since the plain appears to extend westward uninterruptedly to the foothills of the Cascade Range, little would you imagine that between you and the mountains lurk...
Resource Type:: Journal
Full Text:: MADRAS, OREGON By N. V. Peterson* and E. A. Groh** Introduction When you drive through the Madras

Creator:: Oregon. Dept. of Geology and Mineral Industries, Mason, Ralph S., Newton, Vernon C., Hull, Donald A., and Beaulieu, John D.
Resource Type:: Journal
Full Text:: losses were increases in clay, pumice, and items that could not be disclosed in the U. S. Bureau of Mines

Creator:: Oregon. Dept. of Geology and Mineral Industries, Crandell, Dwight Raymond, 1923-, and Mullineaux, Donal Ray, 1925-
Resource Type:: Journal
Full Text:: 1975 Volume 37,No.11 November 1975 • a STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES

Creator:: Oregon. Dept. of Geology and Mineral Industries, McKee, Thomas M., Orr, William N., 1939-, and Weinstein, B. B.
Resource Type:: Journal
Full Text:: consists of a clay soil weathered from tuf- faceous sand and volcanic dust (Taylor, 1960). Taylor ran a

Creator:: Oregon. Dept. of Geology and Mineral Industries, Snavely, Parke Detweiler, 1919-, Wagner, Holly Clyde, 1918-, and MacLeod, Norman S.
Resource Type:: Journal
Full Text:: originally was a basaltic glass, but has altered to waxy, greenish-black clay minerals. Massive to rudely

Creator:: Oregon. Dept. of Geology and Mineral Industries and Suchanek, Ron
Abstract:: Let us travel the 65-mile length of the Columbia River Gorge for a closer look at the rock formations and geology of the area. We will supplement our observations with information from the literature on the geology of the Gorge and try to put together a picture of how the...
Resource Type:: Journal
Full Text:: . Note that in some places there appears a purplish-brown to red-brown clay material. This material

Creator:: Oregon. Dept. of Geology and Mineral Industries and Jackson, Ronald LaVerne
Resource Type:: Journal
Full Text:: areas, a tan to red silty clay formation of Pliocene age over- lies the bauxite (Lowry and Baldwin, 1952

Creator:: Oregon. Dept. of Geology and Mineral Industries and Lund, Ernest H.
Abstract:: Bold, rocky headlands alternating with long curved beaches, sand spits, and bays -- these are the dominant landforms that make up the more than 40 miles of scenic coastline between Roads End and Tillamook Bay. With the exception of Cape Kiwanda, which is composed of sandstone, the headlands are made...
Resource Type:: Journal
Full Text:: discrete ash layers pro- duces a clay of soapy consistency and very little strength when wet. The Nestucca

Creator:: Oregon. Dept. of Geology and Mineral Industries and Walker, George Walton, 1921-
Abstract:: Periodic violent eruptions from many different centers during Cenozoic time deposited vast quantities of pyroclastic material as ash-flow tuffs over most of Oregon, although the Coast Ranges and isolated patches elsewhere in the state appear to have been spared these recurring inundations. Eruptions occurred at different times throughout the Cenozoic,...
Resource Type:: Journal
Full Text:: middle Pliocene age, and a young group of late Pliocene, Pleistocene, and Holocene age. Some of these

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