Raised Shoreline

A raised shoreline is an ancient shoreline now exposed above the current water level, produced by a relative change in sea level driven by global sea level rise, isostatic rebound, tectonic uplift, or some combination of the three. Such surfaces are typically exposed above modern sea level when a heavily glaciated area undergoes glacial retreat, which raises water levels and is then followed by post glacial rebound of the land, lifting the former shoreline surface still higher.