Jökulhlaup deposits in proglacial areas

Maizels, Judith K.

doi:10.1016/s0277-3791(97)00023-1

Cited by 199 publications

(170 citation statements)

References 43 publications

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“…They resulted from increased ablation of the ice or a release of a subglacial, englacial or supraglacial reservoir. In the glacial environment, such sediments have been identified in eskers, in the environment of a tunnel mouth and in outwash plains (particularly those which originated during glacial floods of jökulhlaup type) (Rudoy & Baker 1993, Zieliński 1993, Mazizels 1991, 1997, Brennand 1994, Brennand & Shaw 1996, Russell & Marren 1999, Fard & Gruszka 2007. During catastrophic floods, flow conditions changed from hydraulic flows to hyperconcentrated flow.…”

Section: Discussionmentioning

confidence: 99%

“…3F). They are one of the characteristic features of tunnel valleys and glacimarginal environments (Zieliński 1993, Maizels 1993, 1997, Fard & Gruszka 2007, Pisarska-Jamroży 2007, Gruszka et al 2011. Sediments with a high concentration of gravelly clasts exhibit a considerably lower thickness than poorly-sorted sediments.…”

Section: Planar Cross-bedded Gravels (Gp)mentioning

confidence: 99%

“…3E). Their presence testifies to accumulation in the conditions of supercritical high-energy flows, during which finer grains were carried away (Maizels 1993, 1997, Pisarska-Jamroży 2007, Fard & Gruszka 2007. The creation of openwork texture is considered as the result of effective sorting on the transverse bars surface.…”

Section: Trough Cross-bedded Gravels (Gt)mentioning

confidence: 99%

“…The basal contact is not visible in the outcrop, which makes it difficult to precisely determine their thickness, which certainly exceeds 0.5 m. It is formed by quite wellsorted, medium-grained sands. It is a record of accumulation in the conditions of upper flat bottom, probably in an already open channel (Maizels 1993, 1997, Zieliński 1992, Pisarska-Jamroży & Zieliński 2013.…”

Section: Horizontally Stratified Sands (Sh)mentioning

confidence: 99%

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Structural and textural response to dynamics of fluvioglacial processes of the Rzymsko esker sediments, Central Poland

Frydrych

2016

geol

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Abstract:The study was conducted in the Rzymsko esker, in the Eastern part of the Turek Upland Plain, within the range of the Warta Glaciation (Saalian II). The form was accumulated in a tunnel valley, which was partially filled with esker sediments. Lithofacies analysis, extended by a detailed analysis of clasts, made it possible to identify a considerable variability of sedimentation conditions. At the initial stage, transport and accumulation of sediments took place in the conditions of high energy hydraulic flows or hyperconcentrated flows. The flow energy rose cyclically, which was recorded as sediments coarsening. Deposits of boulders as well as massive and cross-bedded gravels were identified, a record of catastrophic glacial floods. During the later stage of esker formation, sandy and gravelly sediments were accumulated in an open crevasse. The strong erosional force of subglacial water is confirmed by an extremely high content of local rocks in the gravelly fraction (30-87%) and its very good roundness. Zingg shape analysis (1935) revealed a clear predominance of oblate forms among local clasts and equant fennoscandian erratics. A dependency was also found between the processing method and petrographic characteristics.

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Section: Discussionmentioning

confidence: 99%

Section: Planar Cross-bedded Gravels (Gp)mentioning

confidence: 99%

Section: Trough Cross-bedded Gravels (Gt)mentioning

confidence: 99%

Section: Horizontally Stratified Sands (Sh)mentioning

confidence: 99%

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Structural and textural response to dynamics of fluvioglacial processes of the Rzymsko esker sediments, Central Poland

Frydrych

2016

geol

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“…This classification is based on aerial photography mapping and fieldwork (between 2009 and 2012) using established criteria for the recognition of jökulhlaup deposits (e.g. Maizels, 1997); but also draws on documentary evidence of flood timing and routing following the devastating 1362 and 1727 eruptions of Öraefajökull (Roberts & Gudmundsson, 2015;Thorarinsson, 1958).…”

Section: Jökulhlaup Depositsmentioning

confidence: 99%

The geomorphology of Svínafellsjökull and Virkisjökull-Falljökull glacier forelands, southeast Iceland

et al. 2017

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The base digital elevation model (DEM) is compiled from an ice-cap wide airborne LiDAR dataset. The mapped glacial landforms are dominated by sequences of recessional moraines laid down in the mid-Holocene, the Little Ice Age, and the last ∼100 years; the state of landform preservation generally decreasing with age. Interspersed with glaciofluvial sedimentation associated with typical ice-marginal retreat sequences is key geomorphological evidence of high-magnitude volcanogenic outburst floods (jökulhlaups) associated with the eruptions of Öraefajökull in 1362 and 1727 CE. Ice-front retreat has accelerated since c.2005 leaving a rapidly evolving buried-ice landscape in front of Virkisjökull-Falljökull -including an ice-cored esker, a large ice-floored (supraglacial) lake, and numerous actively forming kettle holes and ice caverns. This map could act as a 'reference frame' for geomorphologists studying the temporal evolution of glacial landform-sediment assemblages undergoing rapid change. ARTICLE HISTORY

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Catastrophic Deposition of Gravel from Outbreak Floods

Carling¹

2017

Gravel‐Bed Rivers

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Jökulhlaup deposits in proglacial areas

Cited by 199 publications

References 43 publications

Structural and textural response to dynamics of fluvioglacial processes of the Rzymsko esker sediments, Central Poland

Structural and textural response to dynamics of fluvioglacial processes of the Rzymsko esker sediments, Central Poland

The geomorphology of Svínafellsjökull and Virkisjökull-Falljökull glacier forelands, southeast Iceland

Catastrophic Deposition of Gravel from Outbreak Floods

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