This activity is introduced in lecture with a 3045 minute lecture that reviews the various models for the growth of continental crust starting with models that address the origin of cratons and ending with a discussion of the supercontinent cycle. In class, the Tapestry of Time map of North America (published by the USGS) is presented at the front of the room and students work in groups of two or three to complete a handout that asks them to draw a series of cross sections through North America at different time periods. This activity gives students practice reading maps, making cross sections, and using geologic time, while also reinforcing the concepts behind the evolution and architecture of continental crust. After 10 minutes the handout is turned in at the front of the room, and the answers are presented as an introduction to the geologic history of North America.


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oai:nsdl.org:2200/20100502201202113T,Higher Education,NSDL_SetSpec_380601,Undergraduate (Lower Division),Historical Geology,Vocational/Professional Development Education,Tectonics,Regional Structural/Tectonic Activity,Education,Geoscience,NSDL



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