Stikinia terrane. Hankock member. Abstract of ref. 1404: An Upper Triassic reef complex, formed in the convergent margin of the Stikine Terrane, is well exposed at Lime Peak, in the southern Yokon. It consists of superimposed patch reefs and bedded inter-reef limestone and is  surrounded by volcaniclastic rocks. The reefs are up to 150 m thick and are composed of variable proportions of sponge-coral framework and skeletal sediment. They are the first Tethyan-type sponge reefs recognized in North America. The inter-reef limestones include thick-bedded accumulations of locally derived organisms, and thin-bedded deposits of reef-derived debris. The Lime Peak fossils are a mixture of those with Tethyan affinities, North American endemics, and new forms, possibly reflecting the origin of Stikinia between the Tethys and cratonic North America.