Sea-level change and true polar wander during the Late Cretaceous

Details Sea-level change and true polar wander during the Late Cretaceous Sea-level change and true polar wander during the Late Cretaceous

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2057m&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 10, p. 2057-2060

Mathematics

Logic

2

Geodesy And Gravity: Rotational Variations, Geomagnetism And Paleomagnetism: Paleomagnetism Applied To Geologic Processes, Oceanography: Physical: Sea Level Variations, Tectonophysics: Rheology-Crust And Lithosphere

Scientific paper

We demonstrate that rapid changes in the Earth's rotation vector can drive relative sea-level (RSL) variations in excess of 100 m in as little as 1 m.y. Stratigraphic constraints on sea-level change can thus be used as an independent test of true polar wander (TPW) events proposed on the basis of paleomagnetic evidence. Recent estimates of Late Cretaceous TPW include a period of rapid motion, however a corresponding period of large and rapid sea-level change is not consistently evident in our preliminary examination of the geological record. This suggests that the magnitude of Late Cretaceous TPW may have been overestimated, although a definitive conclusion requires a comprehensive study of high-resolution Late Cretaceous sea-level records. (Index Terms: 1239, 1527, 4556, 8159).

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