Note 8 — Chapter III · FOSSIL PEDIGREES

“It is a common occurrence,” says Charles Schuchert, “on the Canadian Shield to find the Archæozoic formations overlain by the most recent Pleistocene glacial deposits, and even these may be absent. It appears as if in such places no rocks had been deposited, either by the sea or by the forces of the land, since Archæozoic time, and yet geologists know that the shield has been variously covered by sheets of sediments formed at sundry times in the Proterozoic, Palæozoic, and, to a more limited extent, in the Mesozoic.” (“Textbook of Geology,” ed. of 1920, II, p. 569.) It may be remarked that, when geologists “know” such things, they know them in spite of the facts!