Eustatic sea level fluctuations induced by polar wander

Details Eustatic sea level fluctuations induced by polar wander Eustatic sea level fluctuations induced by polar wander

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.345..708s&link_type=abstract

Nature (ISSN 0028-0836), vol. 345, June 21, 1990, p. 708-710. Research supported by ASI and NASA.

Mathematics

Logic

19

Ocean Models, Polar Wandering (Geology), Sea Level, Gravitational Effects, Rheology, Sediments, Stratification

Scientific paper

It is shown here that polar wander of a viscoelastic, stratified earth can induce global sea level fluctuations comparable to the short-term component in eustatic sea-level curves. The sign of these fluctuations, which are very sensitive to the rheological stratification, depends on the geographical location of the observation point; rises and falls in sea level can thus be coeval in different parts of the world. This finding is a distinct contrast to the main assumption underlying the reconstruction of eustatic curves, namely that global sea-level events produce the same depositional sequence everywhere. It is proposed that polar wander should be added to the list of geophysical mechanisms that can control the third-order cycles in sea level.

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