Emergent coastline Emergent coastline An emergent coastline is a stretch along the coast that has been exposed by the sea by a relative fall in sea levels by either isostasy or eustasy. Emergent coastline are the opposite of submergent coastlines, which have experienced a relative rise in sea levels. The emergent coastline may have several specific landforms: The Scottish Gaelic word "machair" or "machar" refers to a fertile low-lying raised beach found on some of the coastlines of Ireland and Scotland (especially the Outer Hebrides. Hudson Bay, in Canada's north, is an example of an emergent coastline. It is still emerging by
Perched coastline Perched coastline A perched coastline is a fossil coastline currently above the present coastline. It can be produced by one of two factors. 1. Perched coastlines can be created by higher sea levels in the past than today. For example during the last Ice Age interglacial period, climates were significantly warmer than today, and thermal expansion of the oceans, together with increased melting of glaciers, meant that sea levels were higher than they are today. This has created evidence of perched coastlines all around the world. 2. Perched coastlines can be created through coastal uplift from local geological processes, particularly