Till (or glacial till) - Till is a poorly-sorted sediment, containing particles ranging from clay- to boulder-size, that is deposited directly by glacial ice. Trilobite - Trilobites (phylum Arthropoda ...

Moreover, the fauna of the older part of the Canadian glacial deposits is more ... stony clays of Britain than our Till or lower boulder-clay. Dr. Dawson seems to have satisfied himself that ...