erosion

Imaggeo On Monday: Great Sand Dunes Sunset

John Counts November 23, 2020

Great Sand Dunes Sunset . Credit: John Counts (distributed via imaggeo.egu.eu)

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)

Michele Calvello October 19, 2020

Tragédia em Petropolis (Brazil) . Credit: Michele Calvello (distributed via imaggeo.egu.eu)

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]

Imaggeo On Monday: Patterns in the landform

Hazel Gibson June 29, 2020

Patterns in the landform. Credit: Basudev Biswal (distributed via imaggeo.egu.eu)

The badlands at the Zabriskie Point (Death Valley, California, USA) rest upon a mudstone foundation. In the prehistoric lakes of Death Valley, fine grained sediments were deposited to form soft rocks. The clay minerals in the mudstone are shaped like tiny plates, which helps create the layers. The combination of the almost impermeable mudstone and Death Valley’s low rainfall makes plant grow ...[Read More]

Imaggeo On Mondays: Natural Arch

Alicia Morugán June 15, 2020

Natural Arch. Credit: Alicia Morugán (distributed via imaggeo.egu.eu)

This natural arch named Pirulico’s tower is located in Mojácar, situated in the south east of the Province of Almería (Andalucia) in southern Spain. A natural arch, natural bridge or, less commonly, a rock arch is a natural rock formation where a rock arch forms, with an opening underneath. Most natural arches form as a narrow bridge, walled by cliffs, become narrower from erosion, wi ...[Read More]