Palaeozoic Geology of the London Area, Ontario

Résumé du livre

"Over a large part of the London area, the bedrock is concealed beneath a mantle of glacial drift and may, therefore, be studied only be means of drilling samples. Information thus obtained furnishes additional structural and stratigraphic data and permits of a more accurate placing of certain geological contacts than was formerly possible. The value of such an investigation and revision becomes evident when one considers the fact that it is with these Paleozoic rocks that oil, gas, gypsum, salt, road metal, building stone, structural shales, etc., in southern Ontario are associated." --