Distinguishing allogenic versus autogenic parasequences

In their original formulation, parasequences were defined as part of a hierarchy between bedsets and parasequence sets (equivalent to systems tracts) that build allogenic sequences. Parasequence sets and sequences were implied to be allogenic in origin, and bedsets and parasequences implicitly autogenic. In this original formulation, parasequence sets could be retrogradational, aggradational or progradational, but offlapping and downstepping …