Eustatic fluctuations in world ocean level
The causes of eustatic fluctuations in the world ocean level are changes in the volume of water and the capacity of ocean and sea basins under the influence of climatic, tectonic, isostatic and magmatic (volcanic) factors. The result of the joint synchronous action of these factors is reflected in the eustatic fluctuations of The world ocean level. The slowest but longest fluctuations (up to several tens and hundreds of millions of years) are due to tectonic and magmatic factors, and the fastest and shortest (hundreds, thousands, and tens of thousands of years) are associated with global climate changes during glacial epochs.