Global sea level, which changes in response to changes in the volume of ocean water and the volume of ocean basins. Shortened term for a marine flooding surface. Highstand Systems Tract. Systems tract overlying a maximum flooding surface, overlain by a sequence boundary, and characterized by an aggradational to progradational parasequence set. Vertical movements of the lithosphere as a result of increased weight on the lithosphere from sediments, water, or ice.
Isostatic subsidence is a fraction of the thickness of accumulated material.
Lowstand Systems Tract. Systems tract overlying a type 1 sequence boundary, overlain by a transgressive surface, and characterized by a progradational to aggradational parasequence set. Marine Flooding Surface. Surface separating younger from older strata, across which there is evidence of an abrupt increase in water depth. Surface may also display evidence of minor submarine erosion.