Glacial Ice-Contact Rings and Ridges

Parizek, Richard R.

doi:10.1130/spe123-p49

Cited by 49 publications

(44 citation statements)

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“…A supraglacial origin for Type 1 hummocks can be supported by simple formanalogy (cf. Clayton, 1967;Boulton, 1967Boulton, , 1972Parizek, 1969;Clayton & Moran, 1974 (Fig. 20) is marked by the outer extent of the push moraines to the 786 south east of Lake Pakowki and runs along the northern tip of the Milk River and north around 787 the Cypress Hills (Wesgate, 1968;Bik, 1969;Kulig, 1996).…”

mentioning

confidence: 99%

Glacial geomorphology of terrestrial-terminating fast flow lobes/ice stream margins in the southwest Laurentide Ice Sheet

Evans

Nathaniel,Joseph,Peter

Cofaigh

2014

Geomorphology

114

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Citation for published item:ivnsD hFtFeF nd oungD xFtFF nd ¡ y gofighD gF @PHIRA 9qlil geomorphology of terrestrilEterminting fst )ow loesGie strem mrgins in the southwest vurentide se heetF9D qeomorphologyFD PHR F ppF VTEIIQF Further information on publisher's website: httpXGGdxFdoiForgGIHFIHITGjFgeomorphFPHIQFHUFHQI Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Geomorphology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Geomorphology, 204, 1 January 2014, 10.1016/j.geomorph.2013.07.031. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. MTR Type 2 sequences are recessional push moraines similar to those developing at modern active temperate glacier snouts. MTR Type 3 ridges document moraine construction by incremental stagnation, because they occur in association with hummocky terrain. The close association of hummocky terrain with push moraine assemblages, indicates that they are the products of supraglacial controlled deposition on a polythermal ice sheet margin, where the Type 3 hummocks represent former ice-walled lake plains. The ice sheet marginal thermal regime switches indicated by the spatially variable landform assemblages in southern Alberta are consistent with palaeoglaciological reconstructions proposed for other ice stream lobate margins of the southern Laurentide Ice Sheet, where alternate cold, polythermal and temperate marginal conditions sequentially gave way to more dynamic and surging activity.

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confidence: 99%

Glacial geomorphology of terrestrial-terminating fast flow lobes/ice stream margins in the southwest Laurentide Ice Sheet

Evans

Nathaniel,Joseph,Peter

Cofaigh

2014

Geomorphology

114

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“…The bedrock equivalence of detached ice blocks are haystack hills or hums. Source: Parizek [7] (Reproduced through the courtesy of The Geological Society of America). Another effect of the perpetuating ice cover of an evolving DeKalb mound also accounts for why only late Wisconsinan, nanoparticle-sized, groundwater-derived, pollen was discovered in a glacial kettle, such as within a DeKalb mound [2] and even in other glacial kettles such as Chatsworth Bog in Livingston County, IL [2,16].…”

Section: Fig (5)mentioning

confidence: 99%

“…(4). Kettles such as the DeKalb mounds both sedimentologically and morphologically match up accurately with other kettles in Saskatchewan, Canada [1,2,7] and New York, USA [2].…”

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confidence: 99%

Glacial Karst Aspects About the DeKalb Mounds in Illinois, USA

Iannicelli¹

2015

TOGEOJ

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Abstract:The glacial dead-ice origin of the DeKalb mounds in DeKalb County, Illinois, USA, is advanced in this study by discussing it within the context of late Wisconsinan glacial karst. Glacial karst is glacial dead-ice topography that resembles carbonate bedrock karst topography. The only difference here is that thermo-erosion or melting of ice by groundwater causes glacial karst, while dissolution of carbonates by groundwater causes bedrock karst. For example, bedrock karst such as haystack hills, dolines and entranceless caves analogously match up to stagnant glacial ice blocks with supraglacial ice pits and entranceless glacial caves. Entranceless bedrock caves are caves with no opening (entranceway) that is big enough for a human, yet contain water and/or accumulations of silt and clay. Although stagnant glacial ice blocks and supraglacial ice pits have been discussed in the literature, entranceless glacial caves is an undeveloped concept which is expounded in this study. An entranceless glacial cave is actually a subglacial/englacial, water-filled cavity formed by thermo-erosion due to active-layer groundwater/talik piping laterally seeping out of the adjoining terrain and into a body of glacial ice, as seen in modern glaciers of Antarctica. This type of water-filled cavity can also be classified as a subglacial or englacial lake. The study also discusses relationships to embryonic DeKalb mounds such as: why a localized part of the continental ice sheet degenerated into stagnant ice blocks; and the Wisconsinan creation of one or more steep depressions in the till plain underlying a DeKalb mound.

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“…Instead, Iannicelli (2003) concluded that the DeKalb mounds are morainic (from glacial dead-ice depositional processes). The formational mechanism between combinatorial dead-ice landforms and an ice-walled lake plain/plateau greatly differs, as magnificently illustrated by Parizek (1970). Curry (personal comm., 2008) and Yansa (personal comm., 2008) were informed about their mistake and each offered an apology to this writer.…”

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confidence: 99%