Fine-grained sedimentary rocks, commonly referred to as "shale" or "mudstone", constitute approximately two thirds of the sedimentary column on Earth, and are nonetheless the least understood ...
NASA's Mars Rover Curiosity captured a 2012 photograph of an outcrop with a sedimentary structure similar to Earth's cross-bedded sandstones. Cross bedding, where large-scale layering is inclined to ...
Because forams evolved quite rapidly, diversifying into new species that are relatively easy to identify, their fossils can help geologists date the sedimentary rocks in which they’re found.
"Finding supermassive black holes at the time when the universe was less than 1 billion years old is like finding some mammal bones among the dinosaur bones in a Jurassic sedimentary rock.