noun
- Plural of eustasy; instances or periods of worldwide changes in sea level caused by variations in the volume of ocean water or the capacity of ocean basins.
Usage: geology; technical term
Examples
- Eustasies during the Pleistocene epoch resulted in dramatic shifts in coastal geography.
- Geologists study past eustasies to understand how climate change affects sea levels.
- The multiple eustasies of the Mesozoic Era left their mark on continental margins worldwide.
- Rising temperatures can trigger eustasies by increasing ocean water volume through thermal expansion.