[3] It is a shallow lake that was formed assumedly by glacial erosion and unique for its size in the James Bay area.

[1] With shores unprotected either by large forests or significant hills, the lake is exposed to the continual sweep of storms from James Bay.

[9] The surrounding terrain area is flat, poorly drained and dominated by peat bogs, muskegs and large fen-meadows.

Many of the smaller points, as well as a portion of the eastern coast south of the lake's outlet, are heaped with large rolled gallet.

At a few points the stratum beneath the peat is exposed, and is composed of a hard dense, almost boulderless bluish clay, evidently glacial.