GeoLog

EGU Guest blogger

This guest post was contributed by a scientist, student or a professional in the Earth, planetary or space sciences. The EGU blogs welcome guest contributions, so if you've got a great idea for a post or fancy trying your hand at science communication, please contact the blog editor or the EGU Communications Officer to pitch your idea.

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

February 7, 2022
Imaggeo On Monday: Salt marsh in El Rocío (Huelva, SW Spain)
Salt marsh in El Rocío (Huelva, SW Spain). Credit: Antonio Jordán (distributed via imaggeo.egu.eu)

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, reeds and bulrushes. The picture shows part of the ...[Read More]

Imaggeo On Monday: Intriguing artwork by heat-loving microbes

January 31, 2022
Imaggeo On Monday: Intriguing artwork by heat-loving microbes
Intriguing artwork by heat-loving microbes . Credit: Julia Miloczki (distributed via imaggeo.egu.eu)

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, after the ...[Read More]

Imaggeo On Monday: Križna jama

January 24, 2022
Imaggeo On Monday: Križna jama
Križna jama . Credit: Peter Huber (distributed via imaggeo.egu.eu)

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 lakes separated by sinter barriers through which crystal clear wa ...[Read More]

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

January 17, 2022
Imaggeo On Monday: Quartz – sericite mylonite, Calamita, Elba
Quartz - sericite mylonite, Calamita, Elba . Credit: Samuele Papeschi (distributed via imaggeo.egu.eu)

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, and ...[Read More]