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, ...

Chalk, limestone, shale, and sandstone are all examples of sedimentary rocks. All these different sedimentary rocks are formed from the broken remains of other rocks that become joined together.

Another day, another step closer to finding out whether life once existed on Mars. A new study suggests Mars rocks collected ...

Petrological characterization was carried out in Ottawa and spectroscopic analysis of graphitic carbon was carried out in London, U.K. "Graphitic carbon from chemical sedimentary rock samples has ...

Sedimentary rocks close sedimentary rockSedimentary rocks ... to weathering and erosion and are therefore very hard-wearing. Examples of metamorphic rocks include marble, which originates from ...