Deformed symmetrical volcanoes

Research Article| July 01, 2005 Deformed symmetrical volcanoes G. Norini; G. Norini 1Dipartimento di Scienze della Terra—A. Desio, Università degli Studi di Milano, via Mangiagalli 34, 20133 Milano, Italy Search for other works by this author on: GSW Google Scholar A.M.F. Lagmay A.M.F. Lagmay 2National Institute of Geological Science, Velasquez Street, Corner C.P. Garcia, University of the Philippines, Quezon City 1101, Philippines Search for other works by this author on: GSW Google Scholar Author and Article Information G. Norini 1Dipartimento di Scienze della Terra—A. Desio, Università degli Studi di Milano, via Mangiagalli 34, 20133 Milano, Italy A.M.F. Lagmay 2National Institute of Geological Science, Velasquez Street, Corner C.P. Garcia, University of the Philippines, Quezon City 1101, Philippines Publisher: Geological Society of America Received: 28 Jan 2005 Revision Received: 18 Mar 2005 Accepted: 23 Mar 2005 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2005) 33 (7): 605–608. https://doi.org/10.1130/G21565.1 Article history Received: 28 Jan 2005 Revision Received: 18 Mar 2005 Accepted: 23 Mar 2005 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation G. Norini, A.M.F. Lagmay; Deformed symmetrical volcanoes. Geology 2005;; 33 (7): 605–608. doi: https://doi.org/10.1130/G21565.1 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 Analog modeling of volcanic cones traversed by strike-slip faulting was conducted, and the cones were analyzed for deformation characteristics. The study shows that symmetrical volcanoes that have undergone basal strike-slip offset may be deformed internally without manifesting any change in their conical shape. Volcanoes deformed by strike-slip faulting may already have well-developed fractures in their interior, yet still appear as a symmetrical cone, exhibiting concentric contours when viewed on a topographic map. Moreover, slight changes in the basal shape of the cone induced by strike-slip movement can be restored by the relatively faster resurfacing and reshaping processes from the deposition of younger eruptive products. These findings pose a subtle but significant point in the assessment of volcanic landslide hazards: not all perfect cones are undisturbed. The detection of concealed deformation is important because fractures induce further instability in volcanoes and act as slip planes during volcano-collapse events. There are many examples of symmetrical volcanoes in nature. The faultless appearance of such perfect cones can be misleading, which requires careful attention in hazards assessment. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.