Portland State University PDXScholar Dissertations and Theses Dissertations and Theses 1976 Geology of the Breitenbush Hot Springs area, Cascade Range, Oregon Clifford Michael Clayton Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Part of the Geology Commons, and the Volcanology Commons Let us know how access to this document benefits ou.y Recommended Citation Clayton, Clifford Michael, "Geology of the Breitenbush Hot Springs area, Cascade Range, Oregon" (1976). Dissertations and Theses. Paper 2264. https://doi.org/10.15760/etd.2261 This Thesis is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible:
[email protected]. --/ j' l I AN ABSTRAC~ OF THE THESIS OF Clifford Michael Clayton for the Master of Science in Geology presented February 27, 1976. Title: Geology of the Breitenbush Hot Springs Area, Cascade Range, Oregon. APPROVED BY MEMBERS OF THE THESIS COMMITTEE: Paul E. Hammond Mar;if'"ifi H.- Beeson { R. E. Corcoran Ansel G. Johns The Breitenbush Hot Springs area lies on the boundary of folded middle to late Tertiary Western Cascade rocks and younger High Cascade rocks. Within the mapped area .. - . ------~ ·--i 2 ;i' the Western Cascade rocks are represented by four forma- tions. The Detroit Beds, a sequence of interstratified tuffaceous sandstone, mudflow breccia, and tuff, is I! . overlain unconformably by the Breitenbush Tuff. The i Breitenbush Tuff consists of three units of welded ~umice-rich, crystal-vitric ash-flow tuffs interbedded with tuffaceous sedimentary rocks.