GeoLog

glacial erosion

Imaggeo On Monday: A meander in the meltwater valley

Imaggeo On Monday: A meander in the meltwater valley

At the edge of the Greenland Ice Sheet, surface melt releases old layers of dust, that have travelled thousands of years into the ice. Under sunny weather, the dust heats up with radiation, melts the ice underneath, and thus accumulates in tiny potholes and meltwater creeks. However, this photo was taken after a rainy day. …[Read More]

Imaggeo On Monday: Rock pyramid shaped by weathering

Imaggeo On Monday: Rock pyramid shaped by weathering

The almost perfect rock pyramid in the foreground was formed by physical weathering and found in the Los Glaciares National Park in southern Argentina. The block was deposited on top of a rock surface polished by glacial erosion. The pyramidal peaks in the background are also the result of glacial erosion, albeit on a much …[Read More]

Imaggeo on Mondays: Flying Rocks

Imaggeo on Mondays:  Flying Rocks

The picture was taken at a hillslope close to the glacier tongue of the Great Aletsch Glacier, the largest glacier in the Alps. With a length of 23 km it is located in the eastern Bernese Alps of Switzerland and composed of the three smaller glaciers Aletschfirn, Jungfraufirn and Eternal snow field converging at Concordia …[Read More]