Sedimentary rocks are formed by small rock pieces which are transported by rivers and laid down in layers. Chalk is a sedimentary rock. Metamorphic rocks are formed when another rock is under heat ...

The record sheds light on the climate early humans experienced when they were spreading out of Africa. A tree-ringed African ...

The record-breaking mission offers an unprecedented opportunity to study the geology of our planet’s largest layer.

Scientists using data from Nasa's InSight lander find mysterious zone they say is best explained by a layer of water-saturated rock ...