“…The basalt-trachydolerite association of the Komandorskiy Islands is comparable in petrological-geochemical respects with the shoshonite associations ofthc present-day island arcs (Jakes and White, 1969; Joplin, 1968Joplin, , 1972Gill, 1970;Smith, 1972). The similarity is expressed in the increased amounts of such elements as K, Sr, and Ba, with a comparatively low content of Fe, and also the presence of titaniferous augite, a mineral typical of the alkalinebasaltoid and alkaline-gabbroid rocks.…”