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 ...
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 ...
I am a chemical sedimentologist: I study how and why chemical sediments form and lithify, with the goal of better understanding how chemical sedimentary rocks (e.g., carbonates, chert, iron formations ...
There is carbon isotope evidence for life in the world’s oldest known volcanic-sedimentary rocks (3.7–3.9 Bya) in the Isua terrane of West Greenland (Rosing 1999). Sedimentary rocks deposited ...