GeoLog

erosion

Imaggeo On Monday: Ice-coated roots at sunset

Imaggeo On Monday: Ice-coated roots at sunset

The coating by the ice and the icicles are created through the interplay of wave action and the simultaneous freezing of the water around the exposed tree roots. The reason for the exposed tree roots is increased bank erosion due to a rather unusual circumstance. The combination of the lake not yet being frozen in early winter, and strong winter storms, make it very easy for the waves to erode the ...[Read More]

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]

Imaggeo On Monday: Great Sand Dunes Sunset

Imaggeo On Monday: Great Sand Dunes Sunset

On a late afternoon in Colorado’s Great Sand Dunes, the sun came out from behind the clouds for a brief moment before it went behind the horizon, illuminating the stoss side of an eroding dune. Sand originated from lacustrine deposits in the San Luis Valley; the Sangre de Cristo mountains, which can be seen in the background, provided a source of some of the sand. This image therefore illust ...[Read More]

Imaggeo On Monday: Tragédia em Petropolis (Brazil)

Imaggeo On Monday: Tragédia em Petropolis (Brazil)

A series of deadly landslides and debris flows occurred in March 2013 in Petropolis, a municipality in the Brazilian state of Rio de Janeiro. This photo has been shot a little more than a month later. It highlights the important “supporting role” played by sewer pipes in this disaster. Description by Michele Calvello, after the description on imaggeo.egu.eu.   Imaggeo is the EGU’s ...[Read More]