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Questions for Discussion: Plate Tectonics: Lake Mead, Nevada

What is happening to the North American continent near the longitude of Lake Mead?
In the past 20 million years, what has happened to the distance between Los Angeles and Las Vegas?
What feature of geological significance does Lake Mead sit atop?
Dr. McNutt refers to 20 million years as being a very short time. What time frame is she using?
What does Dr. McNutt mean when she says that the continent is falling apart?
Using simple materials, such as dominoes and a stretchable fabric, model the creation of slanted layered rock formations.