Imaggeo

Melt water lakes are an impressive and beautiful consequence of warm summer temperatures on Greenlands glaciers. This photo of such a lake with clear blue water was taken from a helicopter on the 79°N Glacier in northeast Greenland during an expedition in July 2018. Supraglacial melt water runs along the surface slope into depressions where the water is accumulating until it refreezes or drains. P ...[Read More]

During parts of the dark Arctic winter, the sun only as much as touches the horizons, melting sunrise into sunset in a dramatic flash of red light. Photo by Maria Scheel, description from imaggeo.egu.eu.   Imaggeo is the EGU’s online open access geosciences image repository. All geoscientists (and others) can submit their photographs and videos to this repository and, since it is open access, ...[Read More]

First, in English: Bottom of a dry lagoon in the Cañada de Los Pájaros (Birds Dale) in the surroundings of the Doñana National Park (Huelva, SW Spain). After an exceptionally long, hot, and dry summer, the area’s lagoon system has dried up. The bottom, clayey and silty, contracts to form a network of columnar aggregates separated by small valleys (cracks). The resulting appearance is that of ...[Read More]

S-C mylonites developed in andalusite-cordierite micaschist (Calamita Schists) in the contact aureole of the Porto Azzurro pluton. The white layers are made of quartz, while the brown layers consist predominantly of white mica and biotite. Top-to-left (East) sense of shear. Read more: Papeschi et al (2017). Heterogeneous brittle-ductile deformation at shallow crustal levels under high thermal cond ...[Read More]