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Grand Staircase-Escalante National Monument Geology Unit 2 Student Activity Geography of Ancient Earth Step 1: How to interpret paleomaps • Find the red dot marking the location of Grand Staircase Escalante National Monument on the four Paleomaps 3 below. • Notice that each of these maps represents a different Period in geologic time. Below each map is brief description of the location of the Monument. • Read each description and familiarize yourself with what to look for as you read paleogeographic maps. I. Late Permian Era~255 mya The Monument is underwater, in a warm tropical sea. How can you tell it’s a tropical sea? Check out its location in relation to the Equator. II. Mesozoic Era – Triassic Period~237 mya The Monument is located on the western shoreline of the continent Pangea. The climate would still be tropical due to its proximity to the Equator. 3 Plate tectonic maps and Continental drift animations by C. R. Scotese, PALEOMAP Project (www.scotese.com) 15
Grand Staircase-Escalante National Monument Geology Unit 2 Student Activity III. Mesozoic Era – Early Jurassic Period ~195 mya The Monument is located inland, in a huge dune field. Tropical westerlies bring sand down from the North. Climate is less tropical away from the Equator. IV. Mesozoic Era – Late Cretaceous Period ~ 94 mya The Monument is again located on the shoreline, this time on the east coast of an inland sea and further still from the Equator. Step 2 Use online paleogeographic maps to follow the tectonic movement of GSENM and correlate its different geographic locations with the environments that existed when major rock layers were formed. I. Follow the internet links to view a series of Paleogeographic Maps for North America from the Department of Geology at Northern Arizona University. 16
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Plate Tectonics and the Rock Layers of Grand ... - Gsenmschool.org

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