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Jack Oliver is credited with providing seismologic evidence supporting plate tectonics which encompassed and superseded continental drift with the article "Seismology and the New Global Tectonics", published in 1968, using data collected from seismologic stations, including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 Defence of Rorke's Drift having fought in the battle from Lady Butler's sketch of him taken at Portsmouth among the other survivors; his name has subsequently been added to the roll of those who fought at Rorke's Drift. The Defence of Rorke's Drift The Defence of Rorke's Drift is an 1880 painting by Elizabeth Thompson, Lady Butler depicting the 1879 Battle of Rorke's Drift which took place during the Anglo-Zulu War of 1877 to 1879. The battle and the men who fought in it were made famous in the 1964 film "Zulu". The Battle of Rorke's Drift caused a wave of patriotic fever in