GeoLog

desert erosion

Imaggeo On Monday: Desert Varnish, Antarctica Style

Imaggeo On Monday: Desert Varnish, Antarctica Style

This photograph highlights the oxidized surface of diorite boulders, which fall from the ice at the base of the Mullins Glacier in Beacon Valley, Antarctica when the ice moves directly from a solid state into a gas state, without becoming a liquid in between (a process called sublimation). The particular features (morphology) of the varnish and the desert pavement of this unique environment are re ...[Read More]