GeoLog

Imaggeo on Mondays

Imaggeo On Monday: Nyiragongo Crater by Nightfall

Imaggeo On Monday: Nyiragongo Crater by Nightfall

This photo shows the centre of the Nyiragongo Volcano, Democratic Republic of the Congo. As the night falls, the molten centre of the Nyiragongo crater comes to life. The smoke rising from the molten caldera centre is illuminated by both the setting sun and the bright yellow magma, displaying a spectacular range of red, pink …[Read More]

Imaggeo On Monday: 12 years of the EGU Photo Competition

Imaggeo On Monday: 12 years of the EGU Photo Competition

In 2010 EGU held our first annual Photo Competition at the General Assembly in Vienna. Since then hundreds of photos have been shared on imaggeo by geoscientists and researchers just like you, with a lucky few being selected each year to be highlighted during the meeting and voted on by our members.   These images …[Read More]

Imaggeo On Monday: Effect of acid drainage on soil

Imaggeo On Monday: Effect of acid drainage on soil

Acid drainage coming from the gangue piles of a metal sulfide mine. The resilient vegetation consists of isolated patches of Spergularia rubra and Molineriella laevis. Description by Juan Antonio Campos, after the description on 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 …[Read More]

Imaggeo On Monday: A steady silent witness

Imaggeo On Monday: A steady silent witness

I took this picture during a sunny field work day in the Mara Wetland, Tanzania. The granitic inselberg appeared to me as a huge silent witness not only of siltation and inundation of the wetland but also of the human actions. Slash-and-burn is widely used to deforest lands and riparian vegetation for new crops and …[Read More]

Imaggeo On Monday: Stands of Time

Imaggeo On Monday: Stands of Time

Within the heart of the Malagasy Hauts-Plateaux, the rolling grasslands are pitted by deep incisions locally referred to as lavaka (‘hole’ in Malagasy). These mass failure features provide vast quantities of terrestrial matter to local freshwater arteries, accounting for over 80% of the annual sediment load of the Betsiboka River. The collapse of the overlying …[Read More]

Imaggeo On Monday: The Heart of a Stone

Imaggeo On Monday: The Heart of a Stone

Heart-shaped glomerocryst (aggregate of phenocrysts) made of plagioclase and pyroxene in a cordierite-bearing dacitic lava from Lipari (Eolie Islands). I study the crustal xenoliths of these lavas to understand the processes accompanying high-temperature metamorphism and crustal melting. But I came across this spectacular glomerocryst and couldn’t help but take a picture! Polarized light photomicrograph. Crossed …[Read More]