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Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including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
Canadian Society for the Study of Rhetoric Canadian Society for the Study of Rhetoric The Canadian Society for the Study of Rhetoric (CSSR) is a bilingual scholarly society based in Canada that is open to scholars involved in the teaching or researching of rhetoric. While the CSSR was founded as a Canadian version of the International Society for the History of Rhetoric, and while—as implied by its original name, the Canadian Seminar on the History of Rhetoric (CSHR)—it originally focused on the history of rhetoric, the CSSR now focuses on a range of rhetorical scholarship. Its membership typically includes scholars from North America and Europe (not just