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]
A tribute to the computational geosciences. A mix of computer infrastructure, a modern workstation, and a simple globe with coastlines. Found this scene at the back of room at Miraikan – the National Museum of Emerging Science and Innovation in Tokyo, Japan. The computers, screens, and globe are behind a plexi-glass and while not intended as part of an exhibition it almost becomes an art-mee ...[Read More]
In Gobustan, Azerbaïdjan, gases such as methane or carbon dioxide are emitted in the underground. They lower the density of the overlying sediments which are pushed upwards by buoyancy. Fingering instabilities occur, where more mobile and lighter sediments form vents and mud volcanoes with upwards moving material. Many small scale cones are deposited when the conduits reach the surface, depositing ...[Read More]
Scientists have combed through the mysteries offered by this ridge for a long time. This is an aerial image of the linear north-south ridge in South-Eastern Utah. First mapped by modern geoscientists in the late 19th century, the ridge is home to numerous Puebloan cliff dwellings and petroglyphs. It is a National Natural landmark and home to the only fossils of a mammal-sized cynodonts (tritylodon ...[Read More]
This picture was taken from the N.B. Palmer ice breaker during the PIPERS expedition in the austral winter of 2017. Two researchers and a marine technician were drilling cores in the sea ice of the Ross Sea. The ice was too thin and started to crack (see the fault in the background), so the team had to drill from the basket. Photo by Célia Julia Sapart, description from imaggeo.egu.eu. Imag ...[Read More]
The drying out of the soil leads to the hazard of flash floods in the wadis of the Dead Sea Valley during sparse but strong rain events. During longer precipitation-free periods and extreme low relative humidity, driven by mesoscale wind, the soil crust ultimately tends to break into piece. Photo by Stefan Schmitt, description from imaggeo.egu.eu. Imaggeo is the EGU’s online open access geo ...[Read More]
Plume rising from Mount Erebus on a rare calm day. This 3794 m high volcano is the most active in Antarctica and close to the American base at McMurdo. Photo by Martyn Unsworth, 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 ...[Read More]