Sedimentary rocks cover 75% of the Earth's surface. Four basic processes are involved in the formation of a clastic sedimentary rock: weathering (erosion)caused mainly by friction of waves, ...

Overall, out of all of the separate subtypes of sedimentary rock, fossils are most abundant in shale, sandstone and limestone, though they also appear in conglomerates and breccias. Shale With ...

By discovering carbonate rocks, NASA's Mars rovers may have unlocked the key to understanding the fate of the Red Planet's climate.

Understanding geology is critical to studying paleontology because fossils are preserved in rock. The characteristics of the rocks that hold fossils can be as informative as the fossils themselves.

Plastistones, a new type of sedimentary rock that’s part-plastic and part-rock, has been found on at least five continents and 11 countries. These rocks form when molten plastic cools within a ...