gray smooth bedrock and speckled pattern of sand and pebble sea particles

small scale rock rocky coast shoreline coastline geology geologic geoscience earth science petrology biology erosion weathering processes solidification wave action rounded rounding drying dries wet aqueous enivronment tidal tides pools fine grained sediment fragmented clastic sedimentary igneous natural nature cracks linear design segmented segment crust dull abrasion seawater details detailed look minerals mineralogy hydrology resources geography textured textural background backdrop abstract abstraction imaginative imagination