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 ...

Map scale indicator inserted. Includes index. Awarded outstanding achievement for thematic maps in 1985 American Congress on Surveying and Mapping Map Design Competition. STRIREF copy 39088015883457 ...

Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust above it to "drip" and suck down rocks from across the continent.

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 ...

The 15th century Vinland Map, the first known map to show part of America before explorer Christopher Columbus landed on the continent, is almost certainly genuine, a Danish expert said Friday.