Flow of water in a consistent direction. The term may apply to a moving mass of water within a larger water body (such as small currents along the coast or large ones like the Gulf Stream) or to the moving water of a whole stream.

Land next to the sea, and the nearby water; the seashore

View of a slice through an object or the surface of the Earth; in geology, “cross section” most often refers to a vertical slice through the surface of the Earth that shows layers of rock

When one geologic feature cuts across another, such as a fault cuts across layers of rock. The crosscutting feature must logically be younger than whatever it cuts across.                                                                                                                                                                                                          

See bivalve

A marine invertebrate belonging to the Phylum Cnidaria, which also includes jellyfish and sea anemones. Colonial corals consist of large numbers of polyps, living in calcium carbonate skeletons that they collectively secrete.