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Fall 2014
The Laramide orogeny (~80-50 Ma) was an anomalous period of mountain-building in the western United States that took place >1000 km inboard of the Farallon Plate subduction margin. The orogeny was preceded by the development of the Western Interior Seaway and eastward migration of the volcanic...
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Fall 2017
The central Andes (18° - 26°S) is an active Cordilleran orogen, formed through the subduction of the Nazca oceanic plate beneath the South American continent. Despite significant tectonic crustal shortening and thickening (60 -70 km), deep seismic imaging indicates a thin to absent mantle...
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