GeoLog

EGU Scientific Divisions

Imaggeo On Monday: Salt marsh in El Rocío (Huelva, SW Spain)

Imaggeo On Monday: Salt marsh in El Rocío (Huelva, SW Spain)

The coast line of Huelva is furrowed by wetlands and sprinkled with salt flats. These areas are a sanctuary for wildlife and are visited by migrating birds travelling between Europe and Africa. In these wetlands grow the salt cedar, the Phoenician juniper, the mastic tree, the Montpellier cistus, the rockrose, the kermes oak, rosemary, cordgrass, …[Read More]

Imaggeo On Monday: Intriguing artwork by heat-loving microbes

Imaggeo On Monday: Intriguing artwork by heat-loving microbes

The geothermal area Sol de Mañana is part of the Altiplano–Puna volcanic complex shared between Bolivia and Chile. The area is characterized by volcanic activity and the sulphur springs host mud lakes and steam pools. The different colours stem from thermophilic, hyperthermophilic and acidophilic bacteria that colonize areas of varying temperatures.   Description by Julia Miloczki, …[Read More]

Imaggeo On Monday: Križna jama

Imaggeo On Monday: Križna jama

The Križna jama Cave on the east side of the periodic Cerknica Lake in Slovenia is an underground karstic cave primarily famous as a rich site of bones of the extinct cave bear, Ursus speleus. The eight kilometer long cave is full of stalagmites and stalactites (sometimes called drip-stone decorations) and also boasts 50 underground …[Read More]

Imaggeo On Monday: Quartz – sericite mylonite, Calamita, Elba

Imaggeo On Monday: Quartz – sericite mylonite, Calamita, Elba

Concomitant thrusting and magmatism resulted in the development of ductile mylonites in the Calamita Schists, part of the contact aureole of the Late Miocene Porto Azzurro pluton. This mylonite is made up of stretched and recrystallized quartz layers, interlayered with thin sericite-rich levels. Sericite resulted from the crushing of contact-metamorphic minerals such as andalusite, cordierite, …[Read More]

What if a tsunami’s magnetic field could predict the height of the wave?

What if a tsunami’s magnetic field could predict the height of the wave?

It’s been well established that tsunamis generate magnetic fields as they move seawater (which is conductive unlike freshwater) through the Earth’s magnetic field. Although researchers previously predicted that the tsunami’s magnetic field would arrive before a change in sea level, they lacked the means to simultaneously measure magnetics and sea level to confirm this phenomenon. …[Read More]

Imaggeo On Monday: Artificial peridotite takes its gold coat off

Imaggeo On Monday: Artificial peridotite takes its gold coat off

Sometimes in order to test a theory about how processes work below the surface of the Earth, scientists need to recreate minerals found in very specific circumstances. This photograph was taken through a binocular microscope during a critical step of the creation of artificial peridotite: extraction of the artificial peridotite from its gold capsule. The …[Read More]