Geochemistry, Mineralogy, Petrology & Volcanology

Imaggeo on Mondays: Hints of an eruption

Eva Eibl June 11, 2018

A hint of an eruption. Credit: Eva Eibl (distributed via imaggeo.egu.eu).

The photograph shows water that accumulated in a depression on the ice surface of Vatnajökull glacier in southeastern Iceland. This 700m wide and 30m deep depression [1], scientifically called an ‘ice cauldron’, is surrounded by circular crevasses on the ice surface and is located on the glacier tongue Dyngjujökull, an outlet glacier of Vatnajökull. The photo was taken on 4 June 2016, less than 22 ...[Read More]

May GeoRoundUp: the best of the Earth sciences from around the web

Olivia Trani June 2, 2018

A column of robust, reddish-brown ash plume occurred after a magnitude 6.9 South Flank of Kīlauea earthquake shook the Big Island of Hawai‘i. (Image: U.S. Geological Survey)

Drawing inspiration from popular stories on our social media channels, as well as unique and quirky research news, this monthly column aims to bring you the best of the Earth and planetary sciences from around the web. Major Story This month the Earth science media has directed its attention towards a pacific island with a particularly volcanic condition. The Kilauea Volcano, an active shield volc ...[Read More]

Imaggeo on Mondays: A volcanic point of view

Olivia Trani May 21, 2018

Sleeping volcano . Credit: Carina Fernandes and Jorge Magalhaes (distributed via imaggeo.egu.eu)

It’s not every day that you can peer into a volcano, much less gaze out at the sky from the inside of one. The Algar do Carvão, or “the Cavern of Coal,” is one of the few places on Earth where you can explore the underground reaches of a volcanic site. The volcanic pit is found on the island of Terceira, part of the Azores archipelago. This collection of islands is an autonomous region of Portugal ...[Read More]

Imaggeo on Mondays: River in a charoite schist

Olivia Trani May 14, 2018

River in a Charoite Schist. Credit: Bernardo Cesare (distributed via imaggeo.egu.eu)

Polarized light photomicrograph of a thin section of a charoite-bearing schist. Charoite is a rare silicate found only at one location in Yakutia, Russia. For its beautiful and uncommon purple color it is used as a semi-precious stone in jewelry. Under the microscope charoite-bearing rocks give an overall feeling of movement, with charoite forming fibrous mats that swirl and fold as a result of de ...[Read More]