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 ...

For example, in 1996, geologist Steve Mojzsis ... a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz. 5. Western Australia’s Pilbara Craton Sulfide ...

Since soon after our planet formed, Earth's 4.6 billion-year-long history was dominated by single-celled life. Something ...

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 ...

Minerals in sedimentary rocks emit characteristic visible luminescence called cathodoluminescence (CL) when bombarded by high energy electrons. CL emissions can be displayed as colour images in a ...