Morphology, volcanism, and mass wasting in Crater Lake, Oregon

Bacon, Charles R.; Gardner, James V.; Mayer, Larry A.; Buktenica, Mark W.; Dartnell, Peter; Ramsey, David W.; Robinson, Joel E.

doi:10.1130/0016-7606(2002)114<0675:mvamwi>2.0.co;2

Cited by 73 publications

(54 citation statements)

References 40 publications

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“…Fornari et al 1988;McAdoo et al 2000;Laberg et al 2007;Ottesen et al 2008;L'Heureux et al 2009; among many others). While these tools have been developed and become standard in the marine environment, their application in lacustrine environments, using portable systems, slowly started only during the past few years, with first case studies in the United States (Lake Tahoe, Crater Lake;Gardner et al 2000;Bacon et al 2002) and recently also in perialpine lakes in Italy and France (Bini et al 2007;Fanetti et al 2008;Ledoux et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Subaqueous morphology of Lake Lucerne (Central Switzerland): implications for mass movements and glacial history

et al. 2011

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Bathymetric data available for Swiss lakes have typically only low to moderate resolution and variable quality, making them insufficient for detailed underwater geomorphological studies. This article presents results of a new bathymetric survey in perialpine Lake Lucerne using modern hydrographic equipment. A digital terrain model (DTM) of the lake floor (raster dataset with 1 m cell size) covering the Chrüztrichter and Vitznau basins documents signatures of major Holocene mass movements and relics from the glacial history of the lake. Combining the bathymetry data with reflection seismic profiles and an existing event chronology allows investigating the morphology in its geological context. Subaqueous sediment slide scars with sharp headwalls cover large areas on moderately inclined slopes. The particularly large Weggis slide complex, correlated with an historical earthquake (AD 1601), features a *9 km long and 4-7 m high headwall and covers an area of several square kilometers. Large debris cones of prehistoric rockfalls and the deposits of recent rockfall events imaged on the almost flat basin plain document mass-movement activity on steep slopes above the lake. Six transverse moraines, visible as subaqueous ridges, as lake-floor lineaments, or only imaged on reflection seismic profiles, indicate a complex glacial-inherited morphology. As many of the documented features result from potentially catastrophic events, high-resolution bathymetry can significantly improve natural hazard assessment for lakeshore communities by extending classical hazard maps to the subaqueous domain.

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Section: Introductionmentioning

confidence: 99%

Subaqueous morphology of Lake Lucerne (Central Switzerland): implications for mass movements and glacial history

et al. 2011

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“…Maar lakes basin fi lls are frequently considered as key environments for paleoclimate reconstructions (Sifeddine et al 1996 ;Thouveny et al 1994 ;Oldfi eld 1996 ;Ariztegui et al 2001 ;Brauer et al 1999 ;Caballero et al 2006 ;Augustinus et al 2012 ;Zolitschka et al 2013 ) but little is known about the triggering factors of gravity reworking phenomena and related natural hazards (Giresse et al 1991 ;Truze and Kelts 1993 ;Bacon et al 2002 ;Bani et al 2009 ;Zolitschka et al 2013 ). There is particularly a need to improve our understanding of subaquatic slope stabilities, since maar basins are frequently characterized by steep slopes, a conical morphology and no large infl ows (Chap.…”

Section: Introductionmentioning

confidence: 99%

Lake Pavin Paleolimnology and Event Stratigraphy

et al. 2016

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International audienceIn this chapter we present an up-to-date database of sedimentary sequences retrieved from Lake Pavin during the last 50 years in both oxic and anoxic waters. The detailed history of this mid Holocene crater lake can be reconstructed from the correlation of radiocarbon dated sedimentary sequences retrieved from the deep central basin, a subaquatic plateau and littoral environments. High-resolution measurements of sediment composition (diffuse spectral refl ectance, XRF core scanning) combined with the analysis of organic matter composition and preliminary pollen and diatom assemblages investigations on selected sediment cores are used to reconstruct (i) the evolution since ca. 7000 cal BP of Lake Pavin limnology together with its radiocarbon reservoir effect and (ii) the impact of a wide range of subaquatic slope failure events. Such a multidisciplinary approach of Lake Pavin basin fi ll revealed contrasted sedimentation patterns just after the volcanic eruption and following the development of a dense vegetation cover along the slopes of the crater. Pavin sedimenta-tion is rapidly and largely dominated by organic rich and fi nely laminated diatomite formation , but several short periods of enhanced mineral inputs might refl ect the infl uence of wetter periods, such as the Little Ice Age. Over the last millennium two large subaquatic mass wasting events are also identifi ed and may have signifi cantly impacted its limnology

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“…The application of high-resolution swath bathymetry within lacustrine environments has become more widespread over recent years, contributing to an improved understanding of sedimentary processes and interpretation of underwater geomorphological features. In the United States, the first multibeam surveys within lacustrine environments include Lake Tahoe (Gardner et al, 2000), western Lake Michigan (Waples et al, 2005), Crater Lake (Bacon et al, 2002) and Yellowstone Lake (Morgan et al, 2003). These studies were used for lake bed characterisation and generation of a base map for research and monitoring, providing insights into volcanism, mass wasting and the geological history of different lacustrine environments.…”

Section: Introductionmentioning

confidence: 99%

Lake bed geomorphology and sedimentary processes in glacial lake Windermere, UK

et al. 2013

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A 1:10,000 map of the geomorphological features and sedimentary processes shaping the landscape is presented for Windermere, the largest lake in the English Lake District. Highresolution multibeam bathymetry and backscatter data, lake bed photography and sediment samples reveal a complex landform record, and have been used to identify nine sub-basins separated by steps, ridges and isolated topographic highs probably related to the retreat of the British and Irish Ice Sheet. Debris flows and anthropogenic features are superimposed on the general bathymetric framework formed since the Last Glacial Maximum. Five distinct lake bed facies are identified through ground-truthing, and are used to describe the sedimentology of the lake revealing a dominance of gyttja. Coarser sediments are found in lake-marginal shallow waters, where the morphology is shaped by dredging scars and circular dredging deposits. Post-glacial slope failure and modern sedimentary processes such as debris flows have further shaped the lake bed and removed the surface drape of gyttja, exposing an underlying facies of Pre-Holocene finely laminated mud.

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Morphology, volcanism, and mass wasting in Crater Lake, Oregon

Cited by 73 publications

References 40 publications

Subaqueous morphology of Lake Lucerne (Central Switzerland): implications for mass movements and glacial history

Subaqueous morphology of Lake Lucerne (Central Switzerland): implications for mass movements and glacial history

Lake Pavin Paleolimnology and Event Stratigraphy

Lake bed geomorphology and sedimentary processes in glacial lake Windermere, UK

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