The Origin of Continents and Oceans

  title={The Origin of Continents and Oceans},
  author={John Walter Gregory},
THE wide appeal of Prof. Wegener's theory of the arrangement of ocean and continent is shown by, the issue of a third greatly revised edition and of this excellent English translation. His theory is that the continents consist of rigid blocks of sial, or rock charac terised by a high percentage of silica and alumina, which are floating partly submerged in a sheet of sima, Ojrrock material composed mainly of silica and magnesia; that the existing continents are due to the breaking up of a once… 
Chapter 20 Opposition to continental drift and the origin of the Atlantic and Pacific Oceans
As pointed out by Marvin (1985), Gregory was influential in persuading many British geologists to reject Wegener's theory of continental drift. In short, with the eminent Cambridge physicist Harold
A harbinger of plate tectonics: a commentary on Bullard, Everett and Smith (1965) ‘The fit of the continents around the Atlantic’
  • J. Dewey
  • Geology
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2015
The 1965 paper of Bullard, Everett and Smith was a linking transition between the theories of continental drift and plate tectonics, showing, conclusively, that the continents around the Atlantic were once contiguous and the Atlantic Ocean had grown at rates of a few centimetres per year since the Early Jurassic.
Continental Drift and the Evolution of the Biota on Southern Continents
  • A. Keast
  • Geography, Environmental Science
    The Quarterly Review of Biology
  • 1971
The post-1960 geological evidence, and postulations, concerning continental drift, support the existence of a southern Gondwana supercontinent until about the mid-Triassic, and contemporary southern biotas have the potential for providing data on the order of break-up of the major land masses.
Continental drift
  • E. Bullard
  • Geology
    Quarterly Journal of the Geological Society of London
  • 1964
During the nineteen-twenties and thirties there was a vigorous controversy as to whether the continents have moved. The arguments largely concerned similarities between now-separated continents.
The Concept of Gondwanaland and Pangaea: A reappraisal
The Gondwanaland never existed as an independent continent, even for a day, as it is generally believed. There was a single mega continent on the Earth i.e. Pangaea that broke up as a consequence of
American Geomorphology at the Dawn of the 20th Century
A geomorphologist, William Morris Davis, founded the Association of American Geographers in 1904. Today, a century later, it is timely to reflect on the nature of geomorphology so long ago, on paths
Continental drift and a theory of convection
Early geologists considered that the Earth's surface is rigid and unchanging. They assumed that the whole Earth is static, except for enough sub-surface contraction to build mountains. After
The contemporary North Pangea supercontinent and the geodynamic causes of its formation
The supercontinental status of the contemporary aggregation of continents called North Pangea is substantiated. This supercontinent comprises all continents with the probable exception of Antarctica.
History of a discussion: selected aspects of the Earth expansion v. plate tectonics theories
Abstract A global tensional system of mid-ocean ridges was discovered at the end of the 1950s. All the world's oceans were proved to be young Mesozoic–Cenozoic structures and these new ideas in
Extensive geological and geophysical evidence suggests that numerous fragments of continents, miniplates, and so called "island arcs" have been incorporated into the Circum Pacific continents. The