Phanerozoic continental drift

Details Phanerozoic continental drift Phanerozoic continental drift

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pepi...24..197i&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 24, Issue 2-3, p. 197-204.

Physics

1

Scientific paper

An account is given of Phanerozoic continental drift. A series of paleocontinental maps is presented for ten intervals from 600 to 25 My ago. Post-Triassic maps were reconstructed using the plate-tectonic model, based mainly on ocean-floor spreading evidence, continental edge fits and apparent polar wander (APW) paths. The middle Carboniferous-Triassic maps are less certain, lacking ocean-floor spreading evidence, but continental positions are constrained by the assumptions of minimum relative continental motions. The pre-Carboniferous maps are based on poorly-defined APW paths and minimum motions, and can only indicate probable configurations during that period.
The main theme is that the late Precambrian ``Pan-African'' Pangea has been progressively fragmented during the Phanerozoic. Pieces broken-off in the Paleozoic have now collided with one another forming the present northern continents, which have grown at the expense of Pangea. Except for India, fragments broken-off in the Mesozoic and Cenozoic are still unattached and form the present southern continents.

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