Glacial geomorphology of the terrestrial margins of the tidewater glacier, Nordenskiöldbreen, Svalbard.

• Published in: Journal of Maps
• Main Authors: Ewertowski, M., Evans, D.J.A., Roberts, D.H., Tomczyk, A.M.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Taylor & Francis 2016
• Subjects: Nordenskiöldbreen; Svalbard; glacier; Tidewater
• Online Access: http://dro.dur.ac.uk/19071/; http://dro.dur.ac.uk/19071/1/19071.pdf; https://doi.org/10.1080/17445647.2016.1192329

A 1:4000 scale map of the terrestrial margins of the foreland of Nordenskiöldbreen depicts a polythermal glacial landsystem containing a record of the landform signatures of individual ice flow units that operate within the glacier snout. A 1:700 map provides a detailed overview of fluted terrain, based on unmanned aerial vehicle images captured in 2014. The pattern of landforms lying inside the Little Ice Age (LIA) latero-frontal moraine on the northern side of the fjord comprises a fluted till surface, which in turn grades into ice-moulded bedrock. This signature records the recession of a single, wide ice flow unit, which was characterised by limited incorporation of subglacial material and restricted delivery of supraglacial debris. Inside the latero-frontal moraine on the south side of the fjord, a fluted surface is subordinate to a pronounced and large ice-cored moraine complex related to the confluence of five narrower ice flow units, each of which transported significant quantities of englacial and supraglacial debris at their suture zones as a series of longitudinal debris stripes. The suite of foreland landforms is diagnostic of both temperate subglacial and frozen-snout conditions, indicating the operation of a warm polythermal glacier fed by multiple flow units during the LIA.