GeoLog

Geochemistry, Mineralogy, Petrology & Volcanology

Imaggeo on Mondays: The ash cloud of Eyjafjallajökull approaches

December 10, 2018
Imaggeo on Mondays: The ash cloud of Eyjafjallajökull approaches
Ash cloud of Eyjafjallajökull (Iceland). Credit: Martin Hensch (distributed via imaggeo.egu.eu)

This photo depicts the famous ash cloud of the Icelandic volcano Eyjafjallajökull, which disrupted air traffic in Europe and over the North Atlantic Ocean for several days in spring 2010. The picture was taken during the initial phase of the eruption south of the town of Kirjubæjarklaustur, at the end of a long field work day. Visibility inside the ash cloud was within only a few metres. The erupt ...[Read More]

Imaggeo on Mondays: Small scale processes, large scale landforms

November 12, 2018
Imaggeo on Mondays: Small scale processes, large scale landforms
Small scale processes, large scale landforms Credit: Jana Eichel (distributed via imaggeo.egu.eu)

This picture was taken in a sea cliff gully landscape at the Portuguese coast. It shows the microrelief which small scale wash and erosional processes produce in these poorly consolidated sediments. These small scale landforms could be interpreted as initial stages of larger scale gully landforms, which can be seen in the back. This highlights the importance of regarding scales and scale linkages ...[Read More]

Imaggeo on Mondays: How erosion creates natural clay walls

October 8, 2018
Imaggeo on Mondays: How erosion creates natural clay walls
Once there was a road...the clay wall. Credit: Chiara Arrighi (distributed via imaggeo.egu.eu)

The badlands valley of Civita di Bagnoregio is a hidden natural gem in the province of Viterbo, Italy, just 100 kilometres from Rome. Pictured here is the ‘wall,’ one of the valley’s most peculiar features, where you can even find the wooden structural remains of a trail used for agricultural purposes in the 19th and 20th centuries. The photograph was taken by Chiara Arrighi, a post-doc research a ...[Read More]