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
Association for the Study of Classical African Civilizations derives its membership from African Americans across class and occupational locations. The organization has since expanded into an international organization, with membership regions representing the continental United States, as well as the Caribbean, Africa, and Europe. ASCAC has four commissions which advance this agenda: education, research, spiritual development, and creative production. Along with creating study groups throughout the world, ASCAC holds an annual conference, operates a youth enrichment program, and is editing a comprehensive history of Africa. The Association for the Study of Classical African Civilizations was initially conceptualized and developed during the First Annual Ancient Egyptian Studies Conference in