Clay mineral genesis was studied in soils representative of several
different geomorphic surfaces in western Oregon, ranging in age from
Pliocene-early Pleistocene to late Pleistocene. Soil solution studies,
clay mineralogy, and soil raicromorphology were employed to provide
evidence of clay mineral synthesis and interpret soil genesis.
Soils at each study...
The mineralogy of soils involved in mass movement in Oregon's
coast range was examined to determine relationships between clay mineralogy
and landscape instability. The objectives were: 1) to determine
what kind of materials constitute the less than 2μ fraction of soils involved
in different categories of mass movement, and 2)...
A mineral map is often of considerable value to
those interested in miring work and development. Since
there are very few, if any such maps for Oregon, we have
endeavored to cover the ground, though only in an incomplete way, since the time we had for working upon it was...
This essay presents a case study of the Regional Gravel Initiative (RGI) workshop, one instance of policy makers using science to inform decision making for sustainable and streamlined processes. The RGI consists of eight agencies, both federal and state, with responsibilities for informing and issuing permits for mining aggregate on...