GeoLog

Geochemistry, Mineralogy, Petrology & Volcanology

Imaggeo on Mondays: Tones of sand

January 2, 2017
Tones of Sand
Tones of sand Credit: Marc Girons Lopez (distributed via imaggeo.egu.eu

With rocks dating as far back as the Precambrian, mountain building events, violent volcanic eruptions and being covered, on and off, by shallow seas, Death Valley’s geological history is long and complex. Back in the Cenozoic (65 to 30 million years ago), following a turbulent period which saw the eruption of volcanoes (which in time would form the Sierra Nevada of California) and regional uplift ...[Read More]

The best of Imaggeo in 2016: in pictures

December 26, 2016
The best of Imaggeo in 2016: in pictures
The best images of 2016, from imaggeo, as chosen by our readers and followers.

Imaggeo, our open access image repository, is packed with beautiful images showcasing the best of the Earth, space and planetary sciences. Throughout the year we use the photographs submitted to the repository to illustrate our social media and blog posts. For the past few years we’ve celebrated the end of the year by rounding-up some of the best Imaggeo images. But it’s no easy task to pick which ...[Read More]

Imaggeo on Mondays: “Vancouver! Vancouver! This is it!”

December 12, 2016
Mount St Helen's, Washington, seen from Johnston Ridge.
Mount St Helen's, Washington. Credit: Andy Smedley (distributed via imaggeo.egu.eu)

On May 18th 1980 Mount St Helens (an active stratovolcano of the Cascades located in the North West US), erupted explosively following a magnitude 5.1 earthquake. The quake triggered a devastating landslide which swept away the volcano’s northern flank – in what is the largest debris avalanche recorded on Earth to date. Removal of a section of the edifice depressurised the volcano’s magmatic ...[Read More]