资讯

A map showing seismic speed in Earth’s crust at 125 miles (201 km) depth across the continental U.S. and portions of Central America and Canada. The North American craton (outlined in black ...
The awe-inspiring Hells Canyon runs along the border of Idaho and Oregon in the United States. Ten miles wide and about 2,400 metres deep, it is North America’s deepest river gorge (pictured ...
This map shows seismic speed in the Earth’s crust at 200 kilometers depth across the continental United States and portions of Central America and Canada. The North American craton (outlined in ...
This collection of Funky Facts from Go Jetters focuses on North America, a continent found entirely within the northern hemisphere. In these clips, we explore iconic landmarks within the United ...