150 Is it Possible to Build a Perfect Continent?
Computers, Science, Tech | This program is completed
Continental crust is the long-time scorekeeper of Earth history, while ocean crust is ephemeral. We want to explore the makeup of continents and ask if a perfect one already exists. After an introduction to basic principles (session 1), we will explore the origin of continental and oceanic crust, explore the composition (rocks, structure, and evolution) of existing continents (session 2); continental growth (session 3); and roles of continental and oceanic crust through time (sessions 4 and 5); then build our own future ideal continent (session 5); and have a field-trip introduction (session 6). Field trip to northeast Tennessee and western North Carolina to see the only locally accessible old crust, recycled into newer Appalachian crust (Saturday, March 1). Field trip follow-up. Why do other planets not have continents (and oceans)? Does an already near-perfect continent exist?
Robert D. (Bob) Hatcher
Bob Hatcher has had a career of 50+ years as a field geologist but has used physical and chemical properties throughout to help understand the geologic processes in the context of deep time. His research focused on how continental crust has evolved during Earth history with the addition of mountain chains to help continents grow. Despite decades of research in the Appalachian Mountains, he has traveled extensively to other parts of North America, Europe, and Asia to "collect" other mountain chains to compare the most recent being the Brooks Range in Alaska.