This document discusses various coastal geological processes. It describes how coastal erosion occurs through hydraulic action, abrasion, attrition, and solution, forming features like wave-cut cliffs, platforms, sea caves, arches, and stacks. Coastal deposition happens when waves lose energy and drop sediment, forming features like spits, baymouth bars, sand bars, and barrier islands. Coastal inundation, or flooding, can result from storm surges, sea level rise, or tsunamis overtopping or breaching natural or man-made barriers. Coastal subsidence is also discussed, which is the sinking of coastal land caused by various geological processes.