Porttipahta end moraine in Finnish Lapland is constrained to Early Weichselian (MIS 5d, Herning stadial)

Sutinen, Raimo; Middleton, Maarit

doi:10.1016/j.geomorph.2021.107942

Cited by 4 publications

(2 citation statements)

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“…Traditionally, eskers are associated with the most recent deglaciation ( Storrar et al, 2014 ; Stroeven et al, 2016 ) because repeated proglacial fluvial and/or subsequent glacial erosion would have likely destroyed them ( Storrar et al, 2020 ). However, in some areas of Fennoscandia cross-cutting relationships ( Johansson & Kujansuu, 1995 ; see also Section 3.1), radiocarbon ages from associated kettle holes ( Lagerbäck & Robertsson, 1988 ) and stratigraphical inferences ( Sutinen & Middleton, 2021 ) indicate that some eskers formed prior to the last deglaciation. Although the majority of esker ridges in Fennoscandia are reasonably inferred to record subglacial drainage during the most recent deglaciation (cf.…”

Section: Resultsmentioning

confidence: 99%

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Subglacial meltwater routes of the Fennoscandian Ice Sheet

Dewald

Livingstone

2022

Journal of Maps

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Subglacial drainage systems are crucial elements of glaciers and ice sheets because they modulate ice flow velocity. However, logistical challenges of measuring subglacial processes beneath contemporary ice and natural limitations in long-term monitoring hinder our understanding about their spatio-temporal evolution. Subglacial meltwater landforms created by palaeo-ice sheets are records of past subglacial drainage systems and offer the potential to study their large-scale development throughout deglaciation. Although collectively recording subglacial drainage, individual meltwater landforms such as eskers, meltwater channels and meltwater corridors, which comprise tunnel valleys and meltwater tracks (assemblages of landforms in broad, elongated paths with irregular surface texture), have mostly been investigated as separate entities. Using high-resolution (1–2 m) digital elevation models, we map integrated networks of subglacial meltwater landforms, herein called subglacial meltwater routes, on an ice-sheet scale in Fennoscandia. Our map provides a basis for future research on the long-term evolution of subglacial drainage networks and its effect on ice dynamics of the Fennoscandian Ice Sheet.

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Section: Resultsmentioning

confidence: 99%

“…Eskers observed on palaeo-ice sheet beds rarely seem to be older than the most recent glaciation (cf. Storrar et al, 2014 ; Stroeven et al, 2016 ) although some exceptions have been found to be preserved from earlier stages ( Johansson & Kujansuu, 1995 ; Lagerbäck & Robertsson, 1988 ; Sutinen & Middleton, 2021 ).…”

Section: Introductionmentioning

confidence: 99%