The horseshoe-shaped Midcontinent Rift is a 2,000-kilometer scar that is also called North America's 'broken heart' by ...

Free from the bother of the caravan, I could climb a mountain ... are pulled apart, blocks slide down along vertical faults, forming the steep cliffs delimitating the rift valley.

North America's "broken heart" is an ancient rift valley in the Midwestern United States ... The only parts of the rift that are visible today are near Lake Superior, where huge blocks of basalt and ...

The authors also found that the Gamburtsev province is underlain by crust and lithosphere that are both much thicker than those of the Prince Charles Mountains ... rift flank and in the glacial ...

Why it's incredible: The rift nearly broke North America in half around 1 billion years ago. North America's "broken heart" is an ancient rift valley in ... where huge blocks of basalt and other ...