Evidence for a Large-Scale Reorganization of Early Cambrian Continental Masses by Inertial Interchange True Polar Wander

  title={Evidence for a Large-Scale Reorganization of Early Cambrian Continental Masses by Inertial Interchange True Polar Wander},
  author={Joseph L. Kirschvink and Robert Ripperdan and David A. D. Evans},
Analysis of Vendian to Cambrian paleomagnetic data shows anomalously fast rotations and latitudinal drift for all of the major continents. These motions are consistent with an Early to Middle Cambrian inertial interchange true polar wander event, during which Earth's lithosphere and mantle rotated about 90 degrees in response to an unstable distribution of the planet's moment of inertia. The proposed event produces a longitudinally constrained Cambrian paleogeography and accounts for rapid… 
Late cretaceous polar wander of the pacific plate: evidence of a rapid true polar wander event
The Late Cretaceous-early Tertiary apparent polar wander path for the Pacific plate is reexamined using 27 paleomagnetic poles from seamounts dated by (40)Ar/(39)Ar geochronology to imply that the event was a rapid shift of the spin axis relative to the mantle (true polar wander), which may have been related to global changes in plate motion, large igneous province eruptions, and a shift in magnetic field polarity state.
Rapid Early Cambrian rotation of Gondwana
Based on the history of Mesozoic–Cenozoic plate motions, as well as simple dynamical considerations, a “speed limit” for tectonic plates has been suggested at ~20 cm/yr. Previous paleomagnetic data
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A paleomagnetic analysis of Cambrian true polar wander
Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Norway
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A stable Ediacaran Earth recorded by single silicate crystals of the ca. 565 Ma Sept-Îles intrusion
The archetypical example of inertial interchange true polar wander (IITPW), the rapid rotation of the entire solid Earth by 90°, is based on two nearly orthogonal directions seen in paleomagnetic


Rapid drift of large continents during the late Precambrian and Paleozoic: Paleomagnetic constraints and dynamic models
During the late Precambrian and early Paleozoic, Laurentia and Baltica moved at minimum drift rates of up to 23 cm/yr. These drift rates are computed from paleomagnetic apparent-polar-wander paths
Calibrating rates of early Cambrian evolution.
Uranium-lead zircon data from lower Cambrian rocks located in northeast Siberia indicate that the Cambrian period began at approximately 544 million years ago and that its oldest (Manykaian) stage lasted no less than 10 million years.
New constraint on the division of Cambrian time
A U-Pb zircon age of 530.7 ±0.9 Ma for a volcanic ash in the lower Placentian Series of the Avalonian terrane in southern New Brunswick provides a precise point for calibration of Early Cambrian
Evidence for late Precambrian plate tectonics in West Africa (reply)
In the Gourma and Iforas regions (Mali) rifting occurred around 800–850 Myr ago along the eastern margin of the West African craton with a triple point in Mali, the Gourma being interpreted as an
Did the Breakout of Laurentia Turn Gondwanaland Inside-Out?
Comparative geology suggests that the continents adjacent to northern, western, southern, and eastern Laurentia in the Late Proterozoic were Siberia, Australia-Antarctica, southern Africa, and
ARC Assembly and Continental Collision in the Neoproterozoic East African Orogen: Implications for the Consolidation of Gondwanaland
  • R. Stern
  • Geology, Environmental Science
  • 1994
Some of the most important, rapid, and enigmatic changes in our Earth’s environment and biota occurred during the Neoproterozoic Era (1000540 million years ago; Ma). Paramount among these changes are