Dust, Geology, Plate Tectonics – Video and Image Resources

NASA Earth Observatory image by Lauren Dauphin, using VIIRS data from NASA EOSDIS LANCEGIBS/Worldview, and the Suomi National Polar-orbiting Partnership.

In the image above, the harmattan wind channels through the cut between two mountain ranges (Ennedi and Tibesti), lifting the diatom-filled dust from the Bodélé depression, once covered by Lake Mega-Chad 7,000 years ago.