Continental drift orogeny at the boundaries of convection cells. By 1967, barely two decades after discovery of the mid-oceanic rifts, and a decade after discovery of the striping, plate tectonics had become axiomatic to modern geophysics. In addition, Marie Tharp, in collaboration with Bruce Heezen, (who initially ridiculed Marie's observations that her maps confirmed continental drift theory), provided essential corroboration, using her skills in cartography and seismographic data, to confirm the theory. Evidence for the movement of continents on tectonic plates is now extensive. Similar plant and animal fossils are found around the shores of different continents, suggesting that they were once
The Defence of Duffer's Drift was written by Albert J. Marckwardt and Michael Burgoyne. The book follows a young lieutenant through successive lessons while conducting stability and counterinsurgency operations in Iraq. The winter 2005 edition of the "Canadian Army Journal" contained the following praise: Paul Hoffman, in his sequel to The Left Hand of God, The Last Four Things, used the example of Duffer's Drift by name as an exercise for Thomas Cale to solve for a defensive position for The Redeemers against the more mobile Commandos of the Folk. The problem set for Cale is to discover how to defend such a position with