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

• Main Authors: Ewertowski, Marek W., Evans, David J. A., Roberts, David H., Tomczyk, Aleksandra M.
• Format: Dataset
• Language: unknown
• Published: Taylor & Francis 2016
• Subjects: Space Science; Medicine; Physiology; FOS Biological sciences; 59999 Environmental Sciences not elsewhere classified; FOS Earth and related environmental sciences; Ecology; 20199 Astronomical and Space Sciences not elsewhere classified; FOS Physical sciences; Sociology; FOS Sociology; 69999 Biological Sciences not elsewhere classified; Nordenskiöldbreen; Svalbard; glacier; Tidewater
• Online Access: https://dx.doi.org/10.6084/m9.figshare.3475409; https://tandf.figshare.com/articles/dataset/Glacial_geomorphology_of_the_terrestrial_margins_of_the_tidewater_glacier_Nordenski_ldbreen_Svalbard/3475409

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.