Palaeocontinental configurations and geoid anomalies

Details Palaeocontinental configurations and geoid anomalies Palaeocontinental configurations and geoid anomalies

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.303..513p&link_type=abstract

Nature (ISSN 0028-0836), vol. 303, June 9, 1983, p. 513-516. Research supported by the Montana College of Mineral Science and Te

Computer Science

7

Continental Drift, Earth Planetary Structure, Geoids, Paleomagnetism, Earth Movements, Subduction (Geology), Tectonics

Scientific paper

Anderson's (1982) continental insulation model, which relates palaeocontinental configurations to geoid anomalies, is shown to be an inadequate explanation of the undulations of subduction-compensated geoid. For example, the dimensions of Pacific and Africa-Atlantic geoid highs vis-a-vis those of the corresponding Pacific and Pangea supercontinents pose a problem. The geoid highs and lows are shown to correlate well with the overall divergent and convergent plate tectonism since the middle Paleozoic and are thus ascribed, respectively, to the ascending and descending patterns of lower-mantle convection.

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