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UPPER CRETACEOUS NANAIMO GROUP AT HORNBY ISLAND
Hornby Island is formed from sediments of the upper Nanaimo Group which are also widely exposed on adjacent Denman Island and the southern Gulf Islands. On this island, a total stratigraphic thickness of 1350 m of upper Nanaimo Group marine sandstone, conglomerate and shale are partially exposed. Four formations underlie the island from oldest to youngest, and from west to east: the