Features of the North Polar Erg (Original NASA/JPL/ASU b/w Frame)

Caption NASA:"Sand Seas on Earth are often called "Ergs", an Arabic name for Dunefield, but a Sand Sea DIFFERS from a Dunefield in - at least - two ways:

1) a Sand Sea has a LARGE regional extent and
2) the individual Dunes forming the Sand Sea are LARGE in size and complex in form.

This VIS image was taken at 82° North Latitude during Northern Spring. The Dunes are still partially frost covered. This Region is part of the North Polar Sand Sea: so note the complexity and regional coverage of the Dunes".

Image information: VIS instrument;
Latitude: 81,2° North;
Longitude: 118,2° East (such as 241,8° West);
Resolution: 19 meter/pixel.