Seismic stratigraphy and bedrock forms in perialpine lakes

Research Article| September 01, 1984 Seismic stratigraphy and bedrock forms in perialpine lakes PETER FINCKH; PETER FINCKH 1Institute for Geophysics, ETH, CH-8093 Zurich, Switzerland Search for other works by this author on: GSW Google Scholar KERRY KELTS; KERRY KELTS 2Geological Institute, ETH, CH-8092 Zurich, Switzerland Search for other works by this author on: GSW Google Scholar ANDRE LAMBERT ANDRE LAMBERT 3Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH, CH-8092 Zurich, Switzerland Search for other works by this author on: GSW Google Scholar Author and Article Information PETER FINCKH 1Institute for Geophysics, ETH, CH-8093 Zurich, Switzerland KERRY KELTS 2Geological Institute, ETH, CH-8092 Zurich, Switzerland ANDRE LAMBERT 3Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH, CH-8092 Zurich, Switzerland Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1984) 95 (9): 1118–1128. https://doi.org/10.1130/0016-7606(1984)95<1118:SSABFI>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 PETER FINCKH, KERRY KELTS, ANDRE LAMBERT; Seismic stratigraphy and bedrock forms in perialpine lakes. GSA Bulletin 1984;; 95 (9): 1118–1128. doi: https://doi.org/10.1130/0016-7606(1984)95<1118:SSABFI>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 SocietyGSA Bulletin Search Advanced Search Abstract Reconnaissance air-gun seismic reflection profiles and sonobuoy refraction measurements were recorded in 17 perialpine lakes. Quaternary fill velocities derived from sonobuoy refraction records suggest a stratigraphic sequence consisting of two general elements. The upper interval with velocities between 1.5 and 1.9 km/sec may represent normal sedimentation of glaciolacustrine sediments, whereas higher velocities of 1.9 to 2.7 km/sec in a lower element probably result from glacier overriding and compaction. The refraction data also show bedrock velocities from 3.6 to 6.7 km/sec in concert with underlying geological formations. Reflection sections from the deep basins show modest overdeepening of the lakes north of the Alps and deep incision of the southern perialpine lakes. The data are consistent with an interpretation of glacial overdeepening of fluvially cut bedrock valleys, overriding of older glaciolacustrine deposits (Riss?), and limited erosion by the Würm glacier streams that seem to scoop but not downcut the basins. We found no evidence for late Quaternary faults. 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.