Skip Navigation

How to Download

FRDR offers multiple ways to download datasets. Learn more in our documentation.

Glacial History and Landform Genesis in the Lac de Gras Area, Northwest Territories

Description: The Quaternary geology of the Lac de Gras area was studied by 1:20 000 surficial geology mapping of 770 km2 and investigating the genesis of enigmatic landforms. Three distinct flow directions of the Laurentide Ice Sheet are recorded: flow to the southwest, then west, and finally to the west northwest. Digital mapping with high-resolution orthoimagery and a 30 cm lidar DEM provides insight into the deglacial history. ‘Subglacial meltwater corridors’ are prominent in the area. These are tracts that roughly parallel the final ice-flow direction, where basal till has been eroded, bedrock is exposed, and glaciofluvial sediments have been deposited; enigmatic, glaciofluvial mounds composed of sandy diamicton are common. These mounds have highly variable morphologies and occur in groups. They are typically 50 m wide and rise up to 15 m above the surrounding topography. Subglacial meltwater corridors and enigmatic mounds likely formed when supraglacial lakes drained catastrophically during deglaciation.

This dataset was originally deposited in the Simon Fraser University institutional repository.
Notes: Rights remain with the creator; contact for details.
Authors: Haiblen, Anna Macdonald; Simon Fraser University; ORCID iD 0000-0002-9773-8030
Keywords: Quaternary Geology
Laurentide Ice Sheet
Surficial mapping
Glacial landform genesis
Subglacial meltwater flow
Lac de Gras
Field of Research: 
Earth and related environmental sciences
Cryosphere processes
Publication Date: 2023-03-13
Publisher: Federated Research Data Repository / dépôt fédéré de données de recherche
Related Identifiers: 
This dataset is cited by
Geographic Coverage: 
Place Name
Lac de Gras
Province /
Province / Territory
Northwest Territories
Appears in Collections:SFU Research Data

Files in Dataset 
No files uploaded
Download entire dataset using Globus Transfer. This method requires a Globus account and installing software. Watch Video: Get Started with FRDR: Download a Dataset
Download with Globus
Files for this dataset are currently being backed up so it cannot be approved at this time. Please try later.

Access to this dataset is subject to the following terms:
Creative Commons Attribution 4.0 International (CC BY 4.0)
Haiblen, A. (2023). Glacial History and Landform Genesis in the Lac de Gras Area, Northwest Territories. Federated Research Data Repository.