Fine-grained foyaite lies along the eastern margin of a granodiorite batholith, and intrudes basic volcanics along the edge of Cinder Lake. A syenitic pegmatite body occurs along the eastern shore of the Lake and contains fist-sized melanites. Further details are not available.
GILBERT, H.P. and ELBERS, F.J. 1972. Parker Lake - Knee Lake - Oxford House area. In Summary of geological field work. Geological Paper, Manitoba Department of Mines, Resources and Environmental Management, Mines Branch, 3/72: 34-7.