What is the chemical composition of living matter on the earth (pls hurry)

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?

The separation of northern ireland from the republic of ireland is an example of