Continental drift plate tectonics theory. In particular, the English geologist Arthur Holmes proposed in 1920 that plate junctions might lie beneath the sea, and in 1928 that convection currents within the mantle might be the driving force. Holmes' views were particularly influential: in his bestselling textbook, "Principles of Physical Geology," he included a chapter on continental drift, proposing that Earth's mantle contained convection cells which dissipated radioactive heat and moved the crust at the surface. Holmes' proposal resolved the phase disequilibrium objection (the underlying fluid was kept from solidifying by radioactive heating from the core). However, scientific communication in the '30 and
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