High-frequency cycle "cycle"

Base Level

Highstand

Lowstand

Parasequence

 The high-frequency cycle "cycle" is the smallest set of genetically related facies deposited during a single base-level cycle. Cycles are comparable to and often equivalent to the "parasequence". Cycle boundaries mark the turnaround from base-level fall to base-level rise (a period of time during which sea level rises from a highstand position, through a lowstand, and returns to a highstand).

Cycles can be mapped across multiple facies tracts and include multiple vertical facies successions (VFS) and are therefore chronostratigraphic units. (Kerans & Tinker, 1997, Mitchum & Van Wagoner,1991).
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