To create the map, the researchers amassed over 2,000 stress orientations taken across North America, of which 300 are brand new. These measurements were taken from boreholes—long, narrow shafts ...

In the long term, the map could inspire and inform modeling efforts aimed at better understanding North America's geologic past, as well as the continent's present day tectonic intricacies ...

NASA's Newest Maps Reveal A Continent's Grandeur And A Secret Date: March 11, 2003 Source: NASA/Jet Propulsion Laboratory Summary: From Canada to Central America, the many grandeurs of North ...

Around 1930, an employee with the U.S. Geological Survey simply took a cutout of the map of North America, and balanced it on the top of a pin. Not the most sophisticated method, perhaps, but for ...