NASA’s Perseverance rover recently captured a stunning image of a black-and-white striped rock on Mars, sparking excitement ...

These tiny organisms accumulated in sedimentary layers over millions of years, undergoing immense pressure and heat deep within Earth’s crust. This process of transforming organic matter into ...

Another two eggshell types came from ornithopod dinosaurs with beak-like mouths for grazing. No one expected to find so many ...

These are sedimentary rock layers chronicling Earth's geological history. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by ...

A team of Chinese and foreign scientists has discovered underground sedimentary layers on Mars that appear to have been shaped by oceanic activity, providing new evidence that water once existed at ...

The principle of superposition states that in an undeformed sequence of sedimentary rocks, each layer of rock is older than the one above it and younger than the one below it (Figures 1 and 2).