Global Warming – Geologist’s point of view-II
Sea-level changes through geological history
Sea-level has been close to its present level for the past 6000 years, before which it was lower and fluctuating, last achieving its present position about 120,000 years ago. About 15,000-16,000 years ago, sea-level was 130-140 m below its present position. For the past 500,000 years it has been lower than today about 90% of the time.
These major changes coincide with the latest Ice Age, the later half of the last 1.65 million years of geological time, represents the last 10,000 years when most of the icesheets have melted. Sea-level falls coincide with periods of glaciation whereas the rises occur during interglacials -- the warmer times between ice advances, like the present day.