Fluctuations in the sea level: eustatic alterations in the Quaternary

Abstract

The average ocean level raicing and lowering is due to eustatic changes or local crustal disturbance. Pronounced eustatic changes in the se level can notice Pleistocene glacial episodes, when the water was withdrawn from the oceans and trapped in continental ice sheets. Eighteen thousands years ago the ocean level was lowered to a maximum beeing its isobath on 100m down the present sea level. Afterwards, the fluctuating average ocean level, was elevated by the Fladrian transgressive episode, ending about six thousand years backward. Forwarding, up to this date we have had litle and repeated advances and retreats on the average ocean level, which trends to a general lowering. The Brazilian data also confirm the eutatic changes reported all over the world.