Submarine landslides along the Siberian termination of the Lomonosov Ridge, Arctic Ocean
| Autor: | Estella Weigelt, Ursula Schlager, Catalina Gebhardt, Wilfried Jokat |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Mass movement Escarpment 010502 geochemistry & geophysics 01 natural sciences Paleontology Sequence (geology) Echo sounding Arctic 13. Climate action Ridge Bathymetry 14. Life underwater Geology 0105 earth and related environmental sciences Earth-Surface Processes Submarine landslide |
| Zdroj: | EPIC3Geomorphology, ELSEVIER SCIENCE BV, 382, ISSN: 0169-555X |
| Popis: | Acoustic and detailed swath bathymetry data revealed a systematic picture of submarine landslides on the Siberian part of Lomonosov Ridge. Whereas numerous studies on mass movement exist along the margin of the Arctic Ocean less is known from central Arctic. A regional survey comprising swath bathymetry, sediment echo sounder and multichannel seismic profiling was performed on the southeastern Lomonosov Ridge. The data provide constraints on the present-day morphology of the Siberian part of Lomonosov Ridge, between 81°–84°N and 140°–146°E. We mapped twelve crescent-shaped escarpments located on both flanks on the crest of Lomonosov Ridge. The escarpments are 2.1 to 10.2 km wide, 1.7 to 8.2 km long and 125 to 851 m high from which 58 to 207 m are occupied by crescent-shaped headscarps. Subbottom data show chaotic reflections within most of the escarpment areas. The unit is overlain by ~110–340 m of semi-coherent parallel reflections. At its bottom the chaotic reflections are limited by a partly eroded high-amplitude reflection sequence that is inclined with |
| Databáze: | OpenAIRE |
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