 The bedrock under Tasiujaq consists of sedimentary and metamorphic formations, chiefly sandstone, slate, greywacke and argillite.Iron ore, dolomite, and mafic rocks are nearby.The region is very rich in marine mammals (seal and beluga), fish (Arctic char, Atlantic salmon, trout), ducks (particularly eider ducks) and many seabirds; also, close to 1000 musk-ox roam the surrounding area.