The "Thelon Oasis" is a section of the wildlife sanctuary along the Thelon River valley between Warden Grove (the Thelon's confluence with Hanbury River) and Hornby Point. Even though it is north of the Arctic tree line, the area supports thick white spruce tree groves, raspberry, currant, and columbine plants, along with tall alluvialdwarf willow thickets and tag alder. Scientists believe the causes of this unusual proliferation of plants more common to subarctic areas include favorable fine-textured soils and climatic oasis effect, higher summer temperatures due to northward elevation fall and the absence of large lakes.[4][7]
The wildlife sanctuary is also the ancestral home of Akilinirmiut, Inuit of the Akiliniq, a hilly area by the shores of Beverly Lake (Tipjalik). While there are many lakes within the Thelon Wildlife Sanctuary, Beverly Lake is notable as the widening of the Thelon River at its northeastern border within the wildlife sanctuary, and the end of the spruce tree groves.[4]
The wildlife sanctuary teems with game but is a hunting free zone, with support from the Inuit of Baker Lake.[8]
A study of the history of the sanctuary would do well to include studying British explorer John Hornby (1880–1927).