Spectacular mobility of ash flows around Aniakchak and Fisher calderas, Alaska

Research Article| March 01, 1977 Spectacular mobility of ash flows around Aniakchak and Fisher calderas, Alaska Thomas P. Miller; Thomas P. Miller 1U.S. Geological Survey, 1209 Orca Street, Anchorage, Alaska 99501 Search for other works by this author on: GSW Google Scholar Robert L. Smith Robert L. Smith 2U.S. Geological Survey, National Center, Stop 951, Reston, Virginia 22092 Search for other works by this author on: GSW Google Scholar Geology (1977) 5 (3): 173–176. https://doi.org/10.1130/0091-7613(1977)5<173:SMOAFA>2.0.CO;2 Article history first online: 02 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 Thomas P. Miller, Robert L. Smith; Spectacular mobility of ash flows around Aniakchak and Fisher calderas, Alaska. Geology 1977;; 5 (3): 173–176. doi: https://doi.org/10.1130/0091-7613(1977)5<173:SMOAFA>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 Ash flows around Aniakchak and Fisher calderas in the Aleutian volcanic arc show evidence of having flowed over formidable topographic barriers at distances of tens of kilometres from their source. Ash flows swept down glaciated valleys on the south side of Aniakchak caldera, crossed a broad lowland with an altitude of less than 35 m, and continued on through passes as much as 260 m high in the Aleutian Range into the Pacific Ocean, a distance of some 50 km. North of Fisher caldera, ash flows flowed over a ridge barrier of 500 m and into the Bering Sea. Knowledge that ash flows have this mobility may help in understanding the distribution of other ash flows and in the discovery of their sources. 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.