Editing Coastal erosion (section)

===Hydraulic action===
[[Hydraulic action]] occurs due to the physical [[weathering]] and mechanical response when waves strike a [[cliff]] face thus compressing air in cracks on the cliff face.<ref>{{Citation |last=Keaton |first=Jeffrey R. |title=Hydraulic Action |date=2017 |encyclopedia=Encyclopedia of Engineering Geology |series=Techniques in Dentistry and Oral & Maxillofacial Surgery |pages=1 |editor-last=Bobrowsky |editor-first=Peter T. |url=https://link.springer.com/referenceworkentry/10.1007/978-3-319-12127-7_158-1 |access-date=2025-03-28 |place=Cham |publisher=Springer International Publishing |language=en |doi=10.1007/978-3-319-12127-7_158-1 |isbn=978-3-319-12127-7 |editor2-last=Marker |editor2-first=Brian}}</ref> This exerts pressure on the surrounding rock, and can progressively splinter and remove pieces. Over time, the cracks can grow, sometimes forming a [[cave]]. The splinters fall to the sea bed where they are subjected to further wave action.