Detail of a photo: Weathered limestone cliff built of hundreds of thin stacked layers like a pile of pancakes, grey at the top and orange-brown below, with a small dark pool in a hollow.
An Atom's-Eye View of the Planet

science outreach

Spinning a yarn about perovksite

Magnesium silicate perovskite is the most abundant silicate in our planet. Never given a mineral name in its own right, it is unstable at Earth’s surface and has only been observed directly in the lab, rather than the field. So it fails to meet the criteria set down by the masters of mineral names, the …[Read More]