Glacial geomorphology of Newfoundland, Canada

We present a synthesis of glacial geomorphology comprising Newfoundland and the surrounding continental shelf. During the last glaciation, this region was encompassed by the Newfoundland Ice Cap that coalesced with the Laurentide Ice Sheet and extended to the continental shelf edge. The subglacial g...

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Bibliographic Details
Published in:Journal of Maps
Main Authors: Sophie L. Norris, Jennifer Organ, Arthur S. Dyke, Taryn Neligan, Cameron C. Stanton, Kelsey Strickland, John C. Gosse
Format: Article in Journal/Newspaper
Language:English
Published: Taylor & Francis Group 2024
Subjects:
Glacial landforms
glacial geomorphology
last glacial maximum
Newfoundland
remote sensing
Maps
G3180-9980
Canada
Ice cap
Ice Sheet
Online Access:https://doi.org/10.1080/17445647.2024.2386296
https://doaj.org/article/8b86e66dfc934cef8722ad3ef9d41478
Description
Summary:We present a synthesis of glacial geomorphology comprising Newfoundland and the surrounding continental shelf. During the last glaciation, this region was encompassed by the Newfoundland Ice Cap that coalesced with the Laurentide Ice Sheet and extended to the continental shelf edge. The subglacial geomorphic signal of terrestrial and marine portions of this ice sheet has been mapped using aerial photography, satellite imagery, SRTM DEMs, multibeam bathymetric data and onshore field mapping over the last 50 years. Here, we build on this, digitizing ∼146,380 features identified in published literature. Using newly available digital elevation data and multibeam bathymetric data, we identify ∼38,550 new features, such as undocumented ice thrust, crevasse and esker ridges and meltwater channels. This updated geomorphological map provides a record of paleo landforms over Newfoundland, enabling future efforts to reconstruct the dynamics, timing and erosion history of ice advance and retreat during the last glacial period.

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