This dataset presents data on soil properties (volumetric ice content, organic matter content, grain size) that come from two thermo-erosion gullies that were studied in the Sirmilik National Park on Bylot Island, NU, Canada. The first gully, TEG1, formed in 1999 and is still active today (2024). Nine boreholes were drilled at TEG1 in June 2013 in three subsites at the following locations: one borehole on an undisturbed polygon in the periphery of the gully, one borehole on a drained polygon near the edge of the gully, and one borehole in the slope of the gully. The second gully, TEG2, is a gully that has been stabilized for at least 66 years. Eight boreholes were drilled at TEG2 in July 2016 at the following locations: two boreholes on undisturbed polygons in the periphery of the gully, two boreholes on drained polygons near the edge of the gully, three boreholes in the slope of the gully and one borehole at the bottom of the gully channel. All cores were scanned by tomodensitometry (CT scan) at the Centre Eau Terre Environnement of the Institut National de la Recherche Scientifique (INRS-ETE), from top to bottom, providing transverse and longitudinal slices images that create a three-dimensional image stack after compilation.
