GeoLog

Imaggeo on Mondays

Imaggeo on Mondays: Drumlins Clew Bay

March 30, 2015
Imaggeo on Mondays: Drumlins Clew Bay
Drumlins Clew Bay Credit: Pete Coxon (distributed via imaggeo.egu.eu)

During ice ages landscapes are sculpted by the power of advancing glaciers. From rock scratches, to changing mountains and the formation of corries, cirques and aretes, through to the formation of valleys and fjords, the effects of past glaciations are evident across the northern hemisphere landscape. Perhaps not so familiar, drumlin fields are also vestiges of the erosive power of ancient ice she ...[Read More]

Imaggeo on Mondays: Escullos

March 23, 2015
Imaggeo on Mondays: Escullos
Escullos. Credit: Alicia Morugán (distributed via imaggeo.egu.eu)

This picture shows a Quaternary aeolianite fossil dune at the Escullos beach, in the Nature Reserve of Cabo de Gata (Almeria, Spain). Originally a soft accumulation of sand grains, shaped by the wind into large mounds and ridges, the dunes eventually turn into rock. As the sediments compact under their own pressure and expel any moisture and fluids retained within them, they become lithified and b ...[Read More]

Imaggeo on Mondays: Retreating Glacier

March 16, 2015

The Svalbard archipelago is considered to be one of the best places to study the geological history of the Earth because its rocks represent every geological period. This image shows a view from the peak of Fugleberget (569 m a. s. l.; 77º 00’ N, 15º 30’ E) on the south-western coast of the island of Spitsbergen. Glaciation of this geologically diverse area gave rise to a variety of geomorphic fea ...[Read More]

Imaggeo on Mondays: Pyroclastic flow, Montserrat

March 9, 2015

Below the warm and tranquil waters of the Caribbean, some 480 km away from Puerto Rico, the North America Plate is being subducted under the Caribbean Plate. This has led to the formation of the Lesser Antilles volcanic arc; the result of the formation of reservoirs of magma as fluids from the down going North America Plate are mixed with the rocks of the overlying Caribbean Plate. The continued m ...[Read More]