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.

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, ...

This is a result of the UK's geological makeup, predominantly composed of sedimentary rocks like chalk and limestone. While these minerals in tap water pose no health risks, they can lead to ...