Oligocene through Pliocene foraminifera from the Yakataga Reef section, Gulf of Alaska Tertiary Province, Alaska

clastic rocks diamictite East Pacific Alaska Cenozoic Foraminifera glauconite Pacific Ocean microfossils Gulf of Alaska Protista mica group Northeast Pacific sedimentary rocks silicates stratigraphy Pliocene reefs Neogene Invertebrata Miocene Yakataga Formation sandstone sheet silicates Tertiary North Pacific Paleogene Oligocene paleoclimatology siltstone United States