These tiny organisms accumulated in sedimentary layers over millions of years, undergoing immense pressure and heat deep within Earth’s crust. This process of transforming organic matter into ...

NASA’s Perseverance rover recently captured a stunning image of a black-and-white striped rock on Mars, sparking excitement ...

A new study suggests glaciers carved metals out from the Earth’s surface 700 million years ago, leading to chemical reactions ...

Another two eggshell types came from ornithopod dinosaurs with beak-like mouths for grazing. No one expected to find so many ...

Mudstone, shale, and limestone are examples of sedimentary rock likely to contain fossils. As the layers of sediment build up on top of one another, they create a physical timeline. The oldest layers, ...

A team of Chinese and foreign scientists has discovered underground sedimentary layers on Mars that appear to have been shaped by oceanic activity, providing new evidence that water once existed at ...

Sedimentary rocks close sedimentary rockSedimentary ... Slate is dark grey/green in colour and can be split into thin layers for use as roofing material. Marble is white or have swirls of colour ...

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 ...