1. n. [Reservoir Characterization]
A systems tract overlying a sequence boundary and overlain by a transgressive surface. Characterized by a progradational to aggradational parasequence set, this systems tract commonly includes a basin-floor fan, a slope fan and a lowstand wedge. It is often abbreviated as LST.
See: highstand systems tract, maximum flooding surface, parasequence, sequence boundary, sequence stratigraphy
