Satellite images of the upper Amazon River Basin taken since 1999 have revealed more than 200 geometric earthworks spanning a distance greater than 155 miles (250 kilometers).

This extremely colorful autumn reflection was captured in the Appalachian Mountains the upper Williams River basin in early October of 2008.

This paper divides the Paleozoic - Middle-Upper Proterozoic marine basins into the closed bearing basin type and open relief basin type.