Continental drift Permian era but failing to account for glaciation in India, Australia and South Africa. Geophysicist Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including those he set up in the South Pacific. It is now known that there are two kinds of crust: continental crust and oceanic crust. Continental crust is inherently lighter and its composition is different from oceanic crust, but both kinds reside above a much deeper "plastic" mantle. Oceanic crust
Drift whale skulls - were used to ask for "whaling magic". The best known of these is the Yuquot Whalers Shrine, associated with the great Mowachaht chief Maquinna. The neighbouring Nuu-chah-nulth and Makah peoples used similar shrines to pull drift whales to them. proposed that drift whales might have formed a considerable summer food resource for people living on the coast of what is now Oregon, before contact with Europeans. Peoples that value whale meat and blubber have kept an eye out for drift whales, and traded the rights to them, for example bartering access to inland fishing rivers. Specific people may