Low-grade metamorphic minerals of the analcite and laumontite subfacies of the zeolite facies and of the prehnite-pumpellyite metagraywacke facies occur in the eastern part of the lower(?) to middle Eocene Metchosin Formation of southern Vancouver Island. By analogy to similar studies of Coombs (1954) and Walker (1951;1960a;l960b), and by reference to experimental temperature-pressure determinations and theoretical principles concerning low-grade metamorphism, it is shown that the present Metchosin surface was once buried to a depth of several miles. This burial was by either (1) Metchosin materials, (2) post-Metchosin sediments, or (3) a combination of these.
