Baja BC and North America at 105 Ma

Mesozoic Paleogeography and Tectonic History, Western North America

Images and text modified from a poster session presented to the Annual Meeting of the Geological Society of America, Seattle, Nov. 2003 by Ron Blakey and Paul Umhoefer, Department of Geology, NAU.


The images and text presented here show the paleogeography and tectonic evolution of western North America during the Mesozoic but tie in to Late Paleozoic and Early Cenozoic events as well. Emphasis is on an evolving and complicated tectonic assembladge of terranes that accreted to western North America, primarily during the Mesozoic. Our goal is to demonstrate the sequences paleogeographic evolution in relation to complex, dynamic, tectonic events. The images were prepared by placing various stratigraphic, tectonic, and sedimentologic data on a base map and then overlying more detailed landforms such as mountains,plateaus, rivers, volcanoes, and lowlands. The data was then painted in Photoshop 7, mostly by cloning topography from digital elevation maps.

Outline of Presentation
  • Abstract
  • Introduction
  • Paleogeography and Geologic History
  • References
  • Text only - all text without figures

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