Proglacial Aggradation and Changes in Braided Channel Patterns During a Period of Glacier Advance: An Alpine Example

Maizels, Judith K.

doi:10.1080/04353676.1979.11879984

Cited by 48 publications

(66 citation statements)

References 25 publications

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“…Maizels (1979) produced a conceptual model of proglacial aggradation and degradation in which the factor controlling the production and reworking of glacial sediment was whether the glacier margin was advancing, retreating or remaining stationary. In Maizels' model, glacier behaviour controlled glacial erosion and debris production, meltwater sediment evacuation and resedimentation, and the exposure and geomorphic activity of non-glaciated ground.…”

Section: Discussion: Implications For Distal Environments and Palaeoementioning

confidence: 99%

“…Maizels 1979;Merrand and Hallet 1996). Sediment budgets have been produced for a number of modern valley glaciers (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Evenson and Clinch 1987;Small 1987;Hunter et al 1996) and alpine proglacial areas (e.g. Maizels 1979;Warburton 1990), but less is known about sediment discharge from modern terrestrial ice-sheet margins that might be analogous to former mid-latitude ice sheets. Knight et al (2002) measured sediment production at our site, but did not address the problem of what happens to this sediment after it is released from the ice.…”

Section: Introductionmentioning

confidence: 99%

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Changes in ice‐margin processes and sediment routing during ice‐sheet advance across a marginal moraine

Knight

Jennings

Waller

et al. 2007

Geografiska Annaler: Series A, Physical Geography

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: Changes in ice-margin processes and sediment routing during ice-sheet advance across a marginal moraine. Geogr. Ann., 89 A (3): 203-215.ABSTRACT. Advance of part of the margin of the Greenland ice sheet across a proglacial moraine ridge between 1968 and 2002 caused progressive changes in moraine morphology, basal ice formation, debris release, ice-marginal sediment storage, and sediment transfer to the distal proglacial zone. When the ice margin is behind the moraine, most of the sediment released from the glacier is stored close to the ice margin. As the margin advances across the moraine the potential for ice-proximal sediment storage decreases and distal sediment flux is augmented by reactivation of moraine sediment. For six stages of advance associated with distinctive glacial and sedimentary processes we describe the ice margin, the debris-rich basal ice, debris release from the glacier, sediment routing into the proglacial zone, and geomorphic processes on the moraine. The overtopping of a moraine ridge is a significant glaciological, geomorphological and sedimentological threshold in glacier advance, likely to cause a distinctive pulse in distal sediment accumulation rates that should be taken into account when glacial sediments are interpreted to reconstruct glacier fluctuations.

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Section: Discussion: Implications For Distal Environments and Palaeoementioning

confidence: 99%

“…Maizels 1979;Merrand and Hallet 1996). Sediment budgets have been produced for a number of modern valley glaciers (e.g.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Changes in ice‐margin processes and sediment routing during ice‐sheet advance across a marginal moraine

Knight

Jennings

Waller

et al. 2007

Geografiska Annaler: Series A, Physical Geography

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“…of channels crossed by a transverse profile across the terrace surface, and LT is the length of the traverse; (3) mean channel width, W, along the same traverse; and (4) mean surfacerelief,R, from bar top to channel bed along the traverse. Topologic indices of the degree of braiding were deri ved from the numbers oflinks (£), junctions 0), bifurcation nodes (b), and sources (s), in each network over a given sample area (e.g., see Maizels 1979). Progressive burial ofthe original braided channel network by loess, and evolution of independent nonbraided systems, would be expected to result in a decrease in CD, CF, and the topologic measures, and an increase in Wand R.…”

mentioning

confidence: 99%

Differentiation of late Pleistocene terrace outwash deposits using geomorphic criteria: Tekapo valley, South Island, New Zealand

Maizels

1989

New Zealand Journal of Geology and Geophysics

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This papcrreassesses the geological interpretation of outwash deposits of different ages based on new data on terrace elevation and gradient, loess thickness, preserved paleochannel networks, and specific gravity of clasts of outwash deposits in the Tekapo valley, South Island. The results have shown no significant difference in these measures between the Wolds andPattersons Terrace deposit, suggesting that they both represent the oldest, highest, steepest, most weathered, and most modified formation in the Tekapo valley. Significant differences have emerged between the Wolds/ Pattersons Terrace Formation and the lower Balmoral Formation, which exhibits a thinner loess cover, higher specific gravity values, and a distinctive dendritic drainage network.The Balmoral Formation is significantly differentiated from the Mt John Formation, which has little loess cover and is traversed by complex braided paleochannel networks. The measures adopted do not discriminate between the Mt John and Tekapo Formations, although loess cover is thinner on the latter. The combined use of these measures of landform, paleochannel pattern, and clast characteristics, has proved a valuable objective means of discriminating between glaciofluvial terrace outwash deposits.

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“…Cette absence de végétation signale que l'ensemble de la bande active est régulièrement inondé. Ces milieux de sandurs sont considérés comme des systèmes géomorphologiques où l'aggradation prédomine, particulièrement lors des avancées glaciaires (Maizels, 1979). Cependant, le recul glaciaire modifie les paramètres régissant le fonctionnement de l'hydrosystème et provoque indirectement des mutations paysagères, même sur la partie aval des bassins versants.…”

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Changement climatique et atrophie des masses glaciaires : quelles mutations pour les paysages islandais ?

Chenet¹,

Roussel²

2008

echogeo

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Proglacial Aggradation and Changes in Braided Channel Patterns During a Period of Glacier Advance: An Alpine Example

Cited by 48 publications

References 25 publications

Changes in ice‐margin processes and sediment routing during ice‐sheet advance across a marginal moraine

Changes in ice‐margin processes and sediment routing during ice‐sheet advance across a marginal moraine

Differentiation of late Pleistocene terrace outwash deposits using geomorphic criteria: Tekapo valley, South Island, New Zealand

Changement climatique et atrophie des masses glaciaires : quelles mutations pour les paysages islandais ?

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