heck and double click the Global Map of Cratonic Shields & Mt Belts overlay to view the Precambrian cratonic shields (maroon) and the younger mountain belts (green).

Use the Problem 8 placemark to fly to the Andes mountains on the South American continent. In the Places panel, turn on the Earthquakes and Volcanoes layers. Because these features are a proxy for tectonic activity, we can summarize our observations with which of the statements below?