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Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including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
The Continental Op The Continental Op The Continental Op is a fictional character created by Dashiell Hammett. He is a private investigator employed as an operative of the Continental Detective Agency's San Francisco office. The stories are all told in the first person and his name is never mentioned. The Continental Op is a master of deceit in the exercise of his occupation. In his 1927 "Black Mask" story "$106,000 Blood Money" the Op is confronted with two dilemmas: shall he expose a corrupt fellow detective, thereby hurting the reputation of his agency; and shall he also allow an informant to collect the