Chloritoid is a metamorphic mineral commonly found inside phyllite rocks – which is shale (a type of mudstone containing clays, silts and muds) that has been metamorphosed several times. Confusingly, chloritoid does not actually contain the element chlorine but instead is an iron magnesium manganese alumino-silicate hydroxide. This particular specimen is from Lyon, France: In larger …[Read More]
Regular Features
Imaggeo on Mondays: Arid lands and ancient lakes
Palaeoclimatologist Annett Junginger takes us to one of the hottest and driest places on Earth in this week’s Imaggeo on Mondays… The picture was taken in 2010 during the third in six expeditions to the remote Suguta Valley in the northern Kenya Rift. This unbelievably beautiful place is located just south of Lake Turkana and …[Read More]
The new EGU blog series on Education: GeoEd
Welcome to GeoEd, the new column on GeoLog dedicated to education in the geosciences! This is a series of posts written by the EGU Educational Fellow, Jane Robb that will cover the new and ongoing education initiatives across the EGU, as well as individual posts under the broad global pedagogical theme of education for sustainable …[Read More]
Geosciences Column: Climate-impact studies and their importance in a world of climatic uncertainty
A new hydrological climate-impact study by Nina Köplin and colleagues, in the European Geosciences Union journal Hydrology and Earth System Sciences, investigates the impacts of climate change on forest expansion and glacier retreat in Switzerland. This study raises important questions as to whether or not land cover changes should be considered as climate change impacts …[Read More]
Imaggeo on Mondays: Travertine takeover
This week’s Imaggeo on Mondays is brought to you by Olivier Galland, who took this photo during an incredible outreach adventure in the Andes… The image displays the spectacular Puente del Inca (The Inca Bridge) hot springs, in the Argentinian Andes of the Mendoza province, along the Vacas River, close to the foot of Cerro …[Read More]
Imaggeo on Mondays: Eddy covariance
This week’s Imaggeo on Mondays is brought to you by Jean-Daniel Paris, a meteorologist from the Climate and Environmental Sciences Laboratory (LSCE), France. He describes how new techniques like eddy covariance tell us about the flux of greenhouse gas emissions to the atmosphere… This picture was taken during a visit to the Hyytiälä research station in …[Read More]
Imaggeo on Mondays: Great faults and faultless geotourism
Road cuttings provide a great window into the wonders of what’s beneath the Earth’s surface. In this week’s Imaggeo on Mondays Bahram Sadry takes us through a beautiful fault between Tabriz and Tehran, Iran… These incredible rock outcroppings along Zanjan-Tabriz highway (the northwest of Iran), are unlike any other outcrop in the world. They are a group …[Read More]
Imaggeo on Mondays: Surface spirals
This week’s Imaggeo on Mondays is no ordinary image; it’s a snapshot of surface ocean speeds and the extent of ice cover in the North Atlantic. It was produced using a high resolution model of ocean eddies – high resolution here means that details are simplified into grids 3 km across, or one 20th of …[Read More]
Geosciences Column: Stitching the seafloor together
You’re standing on a mountain peak, with a fabulous field site before you. Wanting to capture the moment, you take out your iPhone, snap a dozen pictures and your mobile stitches them together beautifully – a nice record to show your colleagues back in the office. Unfortunately, not all field sites are so easy to …[Read More]
Imaggeo on Mondays: Capturing the aurora
The northern lights, or aurora borealis, are created as charged particles interact with the Earth’s atmosphere. These electrons are part of the solar wind and as they pass through the Earth’s magnetic shield (the magnetosphere); the charged particles collide with those in our atmosphere, emitting light. In the southern hemisphere this phenomenon is known as …[Read More]