http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Gray clay (Malpass clay) in the west Eugene Wetlands and the Willamette Valley is weathered and redeposited ash from Mount Mazama
1 online resource (iv, 21 pages) : illustrations (some color), maps (some color).
Abstract--Introduction--Geologic setting of Malpass clay and Dayton soil--Material and methods--Stratigraphic position of the gray clay in the west Eugene wetlands--Chromatography--Vertic soil and gilgai relief--X-ray diffraction--Transmission electron microscope EDX analyses--Transmission electron microscope images--Mineralogy of gray clay unit--Radiometric ages--Palynology--Conclusions--References.
authors: Karin E. Baitis, Gregory J. Retallack, Michael E. James.
Title from title screen (viewed on July 13, 2015).
Includes bibliographic references (pages 19-21).
Technical note (United States. Bureau of Land Management) ; 447