This used to be sand and other sediment - that's why it is called sandstone - which is a type of sedimentary rock. Sedimentary rocks are formed when pieces of rock are eroded, or worn away ...

When rocks (igneous, sedimentary, or metamorphic) are at or near the surface of the earth they are exposed to the processes of weathering. In mechanical weathering rocks are broken up into smaller ...

Non-foliated metamorphic rocks which do not have a layered or banded appearance. Ex: marble and quartzite 4.1.1.1. 1. Intrusive Igneous- solidify below Earth's surface Ex: gabbro, granite 4.1.1.2. 2.

so there are many types of sandstone. Limestone & Chalk Limestone is made up of calcium carbonate (fizzes with acid). This may be shell fragments, mud, or small, round ooliths that form in tropical ...

This is a beginner's guide to identifying UK rock types. The guide has two main sections: background information on the structure and forces affecting the Earth in relation to rock formation a more ...

They look a bit like geodes, but they’re not exactly geodes. There are three types of rock: igneous, metamorphic, and ...