PACIFIC CITY, Ore. — Scott Burns, professor emeritus in geology at Portland State University, thought he had seen it all — until he saw a couple of photos of an extremely rare sand formation on the ...

Late in the story of Mars, long after its lakes and rivers had faded, something quiet still moved beneath its dusty surface.

Stage Sand Transport System Winds blowing over a dune can move grains of sand in three main ways. What path these grains take ...

Aeolian dune systems represent one of the most dynamic and visually striking elements of terrestrial and planetary landscapes. Arising from the persistent action of wind on loose sediment, these ...