GeoPicture of the Week: Petrified Wood

Just like a number of creatures, wood can fossilize too.

GeoPicture of the Week: A colorful crystal mosaic

This is a beautiful specimen, from recent finds at the Wudong Mine of China.

#GeoPicture of the day: Amethyst

For all its beauty, amethyst is a fairly common variety of quartz. This here isn’t even a particularly special image, it’s how amethyst looks like most of the time. What is it about this mineral that makes it so special? Quartz itself is the second-most-abundant mineral in Earth’s crust. Amethyst is one of the more common of the quartz varieties. Amethyst usually

GeoPicture of the Week: Spaghetti Rock

What we’re seeing here is the ductility of the marble. According to the picture author, the marble dates from the Lower Proterozoic, more than 1.6 billion years ago to a period called the Aphebian Age. When rocks are subjected to high temperatures and pressures over long periods of time, they will either transform or break. Marble is not a particularly

#GeoPicture of the WeekThe Sahara Desert in Algeria, as seen by Japan’s ALOS satellite

It’s almost poetry: this image taken by the Advanced Land Observing Satellite “DAICHI” (ALOS) satellite shows the beauty and harshness of the Sahara desert. The Japanese Space Agency (JAXA) wrote: The heat and lack of water render vast desert areas highly unwelcoming, making satellites the best way to observe and monitor these environments on a large scale.

GeoPicture of the Week: Uvarovite

Uvarovite is a type of chromium-bearing garnet, one of the rarest minerals of garnets. Garnet species are found in many colors including red, orange, yellow, green, purple, brown, blue, black, pink, but uvarovite is always green.

#GeoPicture of the Week: Odyssey hits 60,000 Mars orbits

This image shows, in false color, the region around Gale Crater on Mars. It was taken by the 2001 Mars Odyssey spacecraft – but we just call it Odyssey. Odyssey has been orbiting the Red Planet for 14 years, 5 months and 20 days, recently celebrating a whopping 60,000 orbits around the planet, taking pictures and making valuable observations in the process. It currently

GeoPicture of the Week: The Moon’s Geology

It’s absolutely baffling that we’ve reached a level where we can not only study the geology of the Earth, but also that of other bodies in the solar system – in this case, the Moon. Advertisement This is a false color mosaic constructed from a series of 53 images taken through three spectral filters by Galileo’s imaging system as the spacecraft

GeoPicture of the Week: Patagonia’s shrinking ice fields

  The photo was taken with NASA’s Landat 8 satellite. Landsat is the longest-running enterprise for acquisition of satellite imagery of Earth, with the first one being launched in 1972. Advertisement Since the end of the Little Ice Age, the ice fields of Patagonia and other parts of South America have been shrinking as global temperatures have increased. A number of

GeoPicture of the Week: Beautiful Hematite

Hematite is a fairly common mineral consisting of iron and oxygen (Fe2O3). Hematite can occur in a variety of colors, from black to steel or silver-gray, brown to reddish brown, or red. The name hematite is derived from the Greek word for blood, not for its red color itself, but for the trace it leaves behind when scratched or powdered. The spectral