Structural evidence for dikes beneath silicic domes, Medicine Lake Highland Volcano, California

Research Article| August 01, 1983 Structural evidence for dikes beneath silicic domes, Medicine Lake Highland Volcano, California Jonathan H. Fink; Jonathan H. Fink 1Department of Geology, Arizona State University, Tempe, Arizona 85287 Search for other works by this author on: GSW Google Scholar David D. Pollard David D. Pollard 2U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Geology (1983) 11 (8): 458–461. https://doi.org/10.1130/0091-7613(1983)11<458:SEFDBS>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jonathan H. Fink, David D. Pollard; Structural evidence for dikes beneath silicic domes, Medicine Lake Highland Volcano, California. Geology 1983;; 11 (8): 458–461. doi: https://doi.org/10.1130/0091-7613(1983)11<458:SEFDBS>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Three types of structural geologic evidence have been used to determine the geometry of conduits that supplied magma to rhyolite flows and domes. For the Medicine Lake Highland Volcano, vent alignments, ground-crack geometry, and the distribution of flow banding, surface fracture patterns, and remelted zones on dome surfaces help us to conclude that dikes rather than pipe-like conduits fed these 1,100-yr-old extrusions. Solidified remains of the tops of some of these dikes may be as shallow as 30 m below the surface. Conduit geometry is an important factor in understanding and forecasting silicic eruptions and in siting geothermal wells. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.