Soil acidity is a major factor inhibiting pasture production in western Oregon. The typical management solution to acidic soil problems is to lime. However, lime cannot be incorporated directly into the soil in established pasture. The only alternative is topdress or surface apply lime and wait for soil fauna to...
The Whittier fault forms the central part of a fault system extending
from the East Montebello fault at Whittier Narrows to the Elsinore fault,
which is traced as far as the Mexican border. The Whittier fault forms a
restraining bend in this fault system, resulting in uplift of the Puente...
Lipid biomarkers in sediments are widely used to infer environmental conditions that have
occurred in the geological past, but these reconstructions require a careful consideration of the
biotic and abiotic processes that degrade and alter the lipid biomarker compositions before
and after deposition. In this paper, we use alkenones produced...
Four distinct lithologic units compose the Tertiary rocks of the Neahkahnie Mountain - Angora Peak area, located along the northwest
Oregon coast near the town of Nehalem. The Tertiary units are the late Oligocene to early Miocene Oswald West mudstones, the middle Miocene Angora Peak sandstone member of the Astoria...
Geomorphic change along the lower Clackamas River is occurring at
a millennial scale due to climate change; a decadal scale as a result River
Mill Dam operation; and at an annual scale since 1996 due to a meander
cutoff. Channel response to these three mechanisms is incision.
Holocene strath terraces,...
From 2002 to 2007, 101 camelid abortions and stillbirths were submitted to the Veterinary Diagnostic Laboratory at Oregon State University (84 alpacas, 13 llamas, four unknown). For most of the cases (n=67) a cause was not determined by routine testing. Eighty-five submissions included placenta for microscopic examination of which 55...
Sequence stratigraphic analysis of the southern Tyee basin, Oregon Coast Range, reveals
that the lower to middle Eocene forearc and subduction zone strata comprise four depositional
sequences. Sequence I (lower Umpqua Group) represents a partially subducted accretionary
wedge. Sequence II (upper Umpqua Group) is a deltaic sequence that filled irregular...