GeoPicture of the Week: Spaghetti Rock

GeoPicture of the Week: Spaghetti Rock

Photo by Mike Beauregard. What we're seeing here is the ductility of the marble. According to the picture author, the marble dates from the Lower Proterozoic,...

GeoPicture of the Week: Uvarovite

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,...

GeoPicture of the Week: Crinoid Fossils

GeoPicture of the Week: Crinoid Fossils

Crinoids are marine animal (not plants) that have been around since the late Cambrian, some 500 million years ago. Crinoids usually have a stem used to attach themselves to a substrate,...

GeoPicture of the Week: Natural Fluorite

GeoPicture of the Week: Natural Fluorite

Fluorite (also called fluorspar) is a mineral consisting of calcium fluoride, CaF2. It belongs to the halide minerals, alongside common salt (called halite in its mineral form). Halide minerals crystalize...

GeoPicture of the Week: Martian Chronicles

GeoPicture of the Week: Martian Chronicles

The Astro-geology team working on analyzing the photos from Curiosity Rover is having a busy week. They recently posted this amazing picture and announced their plans for the future. The...

Cross bedding explained, on an outcrop from Mars

Cross bedding explained, on an outcrop from Mars

NASA recently uploaded a strikingly beautiful photograph on their website showing a petrified sand dune on Mars. The image was actually pieced together from several shots taken using Curiosity's Mast...

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