Global paleogeographic reconstructions throughout the Ediacaran Period: Possible IITPW events

by Andrés Cukjati

Universidad de Buenos Aires

Abstract

The Ediacaran is a fascinating period of the Earth where numerous paleogeographic, climatic and biological changes occurred.  Worldwide paleomagnetic data from this period are controversial.Reliable paleomagnetic poles from different cratons suggest large paleolatitudinal changes in very short periods. Different non-actualistic hypotheses have been postulated to explain them. In this work, a compilation and selection of Ediacaran paleomagnetic data from the main cratons were analyzed, leading to a set of global paleogeographic reconstructions throughout the Ediacaran. All cratons with reliable paleomagnetic information share similar motions during two time-intervals. The first one (615–590 Ma) can be described by rotation around an Euler pole located at the equator, while the second one (575–565 Ma) by another around an Euler pole near the tropics. Whether these apparent large and fast displacements can be assigned to inertial interchange true polar wander (IITPW) events is discussed.

Published Feb. 23, 2024 1:35 PM - Last modified June 7, 2024 12:14 PM