Pyromorphite is as awesome as it sounds. The mineral is composed of lead chlorophosphate: Pb5(PO4)3Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. However, most of the time, it is found as a secondary mineral in the oxidized zones of lead ore deposits. The color of the mineral is usually some bright shade of green, yellow or
The Arctic tundra is one of the harshest environments on the face of the planet… but you wouldn’t tell that by looking at the photography of Ivan Kislov. In his pictures, the tundra is teeming with wildlife, represented in all its splendour.
I wanted to post something more science-oriented, or something more directly related to geology… but we have time for that. For now, let’s just admire the beauty of Mt Rainier in the sunset. Mount Rainier is a large stratovolcano located 54 miles (87 km) southeast of Seattle. It is the most topographically prominent mountain in the contiguous United States and
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
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
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!
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
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
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
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