A SURVEY OF PALEOMAGNETIC DATA ON MEXICO

抄録

A compilation is given of all the pole positions either calculated from or given in several paleomagnetic studies carried out so far on Mexican regions. These are compared with the paleomagnetic data from North America (N.A.). The results (Oligocene data) clearly show the presence of relative tectonic movements of the Western Cordillera. The data for Recent to Miocene age seem to be consistent with N.A. data except Pliocene pole positions for Baja California which is taken as an evidence of movement of Baja California relative to Mexico or North America. The Mesozoic pole positions are also considered to show the possibility of tectonic instability of Mexico relative to 'stable' North America. Practically no work has been done so far on older rocks (Pre-Mesozoic) of Mexico.