Post-kimberlite Eocene strata within a crater basin, Lac de Gras, Northwest Territories, Canada - Hamblin, A.P.; Stasiuk, L.D.; Sweet, A.R.; Lockhart, G.D.; Dyck, D.R.; Jagger, K.; Snowdon, L.R. (International Kimberlite Conference: Extended Abstracts, 2003)