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Creator:: DiGiulio, Jennifer
Abstract:: Volcanic and sedimentary deposits of the Mount Jefferson area (MJA) record a fourmillion-year history of arc-related volcanism related to the subduction of the Juan de Fuca plate beneath North America. 171 mapped stratigraphic units over an area of 150 km² reveal four periods of volcanic activity resulting in diverse composition...
Full Text:: System: Geochemistry, Thermobarometry, and Geologic Map of the Mount Jefferson Area, Oregon

Creator:: DiGiulio, Jennifer
Abstract:: Volcanic and sedimentary deposits of the Mount Jefferson area (MJA) record a fourmillion-year history of arc-related volcanism related to the subduction of the Juan de Fuca plate beneath North America. 171 mapped stratigraphic units over an area of 150 km² reveal four periods of volcanic activity resulting in diverse composition...

Creator:: Sorte, Bruce, Campbell, Claudia, and Oregon State University. Extension Service
Abstract:: Published September 2004. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: , with a 39 percent increase between 1990 and 2000 (U.S. Census Bureau). Jefferson County is also one of

Creator:: Currie, J. A., Wolfe, John W. (John William), 1917-, Swarner, L. R. (Lawrence Robert), and Oregon State College. Agricultural Experiment Station
Abstract:: Published May 1959. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: , Deschutes, and Jefferson Counties. The first irrigation projects in the area were developed in Crook and

Creator:: Kagan, James S., Murray, Michael, and Schuller, Reid
Abstract:: The National Natural Landmarks (NNL) Program encourages the preservation of exceptional examples of the Nation’s biological and geological features. To qualify for NNL designation, a site must be one of the best examples of a geological or biological feature within a biophysiographic province. The Island is an isolated plateau located...
Full Text:: Jefferson, and many of the other Cascade Mountain volcanoes. 4 The Island is located in the National

Creator:: Kagan, James S., Murray, Michael, and Schuller, Reid
Abstract:: The National Natural Landmarks (NNL) Program encourages the preservation of exceptional examples of the Nation’s biological and geological features. To qualify for NNL designation, a site must be one of the best examples of a geological or biological feature within a biophysiographic province. The Island is an isolated plateau located...
Full Text:: of The Island Jefferson County, Oregon For its Merit in Meeting National Significance

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