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: Effect of acid drainage on soil

March 7, 2022
Imaggeo On Monday: Effect of acid drainage on soil
Effect of acid drainage on soil. Credit: Juan Antonio Campos (distributed via imaggeo.egu.eu)

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

February 28, 2022
Imaggeo On Monday: A steady silent witness
A steady silent witness. Credit: Francesco Bregoli (distributed via imaggeo.egu.eu)

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 grazing fields along the Mara River. The induced habitat degradation is jeopardizin ...[Read More]

Imaggeo On Monday: Stands of Time

February 21, 2022
Imaggeo On Monday: Stands of Time
Stands of Time. Credit: Trent Marwick (distributed via imaggeo.egu.eu)

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 laterite exposes a comparatively nutr ...[Read More]

Imaggeo On Monday: The Heart of a Stone

February 14, 2022
Imaggeo On Monday: The Heart of a Stone
The Heart of a Stone. Credit: Bernardo Cesare (distributed via imaggeo.egu.eu)

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 pho ...[Read More]