About Devon Island
Devon Island is located in the Territory of Nunavut in Canada. The expedition base camp will be located just outside the northwest area of the Haughton impact crater, which is located at 75°22'N latitude and 89°41'W longitude.
Devon Island is the largest uninhabited island on Earth, with a surface area of approximately 66,800 km2. Its geology presents two major provinces: a thick (presently ~ 1.3 km) subhorizontal sequence of Paleozoic (Cambrian to Devonian) marine sedimentary rocks dominated by carbonates (dolomite and limestone) forming part of the Arctic Platform; and a Precambrian crystalline (gneissic) basement lying unconformably under the stack of marine sediments, forming part of the Canadian Shield. The Paleozoic sediments present a gentle dip of approximately 4° towards the west. The flat-topped plateau characterizing much of Devon Island's surface is an old erosional surface (peneplain) exposing sediments of increasing age towards the east.
The coastal areas of the island present steep sea cliffs and deep glacial trough valleys and fjords, many of which were likely last occupied by ice during the Last Glacial Maximum which ended approximately 10,000 to 8,000 years ago. A substantial ice cap representing a remnant of the Laurentide/Inuitian ice sheet system still occupies the easternmost third of the island. The rest of Devon Island presents a barren rocky surface incised by sinuous glacial trough valleys, dendritic meltwater channel networks, and clusters of small lakes. NASA