GeoPicture of the week: Volcano in the sunset


This is Volcán Puyehue, in Chile. It is a stratovolcano – a volcano built from many layers of superimposed lava. The volcanic complex has shaped the local landscape and produced a huge variety of volcanic landforms and products over the last 300,000 years. Cinder cones, lava domes, calderas and craters can be found in the area apart from the widest variety…


GeoPicture of the Week: Carminite

carminite mineral

It’s been a while since we posted a mineral for our #GeoPicture section, and now we’re back with a special one: carminite. Carminite is a rare, special mineral with small crystals (usually smaller than 2cm) which often occur as acicular crystals. The mineral is heavy but soft and interestingly enough, despite being really beautiful, it forms as an alteration product of arsenopyrite…


GeoPicture of the Week: A Geologists dream house

casa do penedo

This is Casa do Penedo, in Portugal – a breathtaking house sandwiched between two rocks in a beautiful countryside. I can’t speak for all geologists out there, but for me… this definitely looks like a dream house!……


GeoPicture of the Week: Volcanic Eruption from Above


What we are seeing here is an amazing aerial photograph of the Sarychev Peak Volcano erupting on June 12, 2009. The picture was released by NASA.   Sarychev Peak is a stratovolcano – a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash. During the eruption, the International Space Station passed overhead and astronauts were able…


GeoPicture of the Week: Kutkhiny Baty, The Weird Valley


Deep in the Kamceatka peninsula, there lies an eerie, unique valley – Kutkhiny Baty – The Weird Valley. This is how Kutkhiny Baty looks like from a helicopter: The valley is made from whitish pumice stone. Pumice is a very light volcanic rock. Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano. The unusual foamy configuration of pumice happens…


GeoPicture of the Week: Baconite !


Alright, I know what some of you are thinking – how is this the GeoPicture of the Week, when you already published another one this week? Well, I was thinking that since I skipped a few weeks due to field work, this is my way of making it back to you! So enjoy the yummy treats that geology has to…


GeoPicture of the Week: Lava Flow from Kīlauea Volcano, Hawai`i

Image credits: USGS.

We tend to think of geology as a slow moving force, something which rarely interferes on the scale of a human life. But every once in a while, geology comes up and shows us that it is actually ruling the Earth. Such is the case with the Hawai’i lava flow. In case you didn’t know, a slow moving lava flow is…


GeoPicture of the Week: Complete double rainbow encircles Australian town


For our GeoPicture of the Week, we’ve gotten used to pictures of minerals, fossils or geological phenomena – but today, I want to show you something different: a stunning, complete, double rainbow: The picture was taken from a helicopter flying over Cottesloe Beach in Western Australia. Rainbows appear because water droplets act like prisms, separating visible light into its constituent spectral…


GeoPicture of the Week: Amazing Baryte

Locality: Clara Mine, Black Forest, Baden-Württemberg, Germany*Photo : © Edgar Müller

What we’re looking at here is a picture of baryte. Baryte is a mineral consisting of barium sulfate. The mineral itself is generally colorless, and it is used industrially to extract barium. Baryte occurs in a large number of depositional environments, and is deposited through a large number of processes including biogenic, hydrothermal, and evaporation, among others. It usually occurs in lead-zinc…