The Lulu Island surface clay deposits are non-calcareous, grey, silty clays which are somewhat lensy in form, changing laterally into sand in many places within a short distance. They are safe, fast drying, low shrinkage clays. The clays were used for bricks but were found to be too soft and porous. However, pottery companies have sucessfully made porous water jugs (Geological Survey of Canada, Memoir 135, 1923, page 74).