The Hobart Butte high-alumina clay deposit, Lane County, Oregon
Explore the source record for details and available documents.
Circular↗
Geology topics
Robert L. Nichols
Publications and source records attributed to Robert L. Nichols.
Preliminary Report on the Cowlitz High-Alumina Clay Deposit Near Castle Rock, Cowlitz County, Washington
Explore the source record for details and available documents.
Open-File Report↗
Preliminary report on the Molalla high-alumina clay deposit near Molalla, Clackmas County, Oregon
Explore the source record for details and available documents.
Open-File Report↗