Sequence Stratigraphy - Trace Fossils as Indicators of Sedimentary Environments - page 158

FIGURE 1 Schematic development of an erosionally exhumed omission suite. (A) Muddy sub-
strate is buried, dewatered, and compacted. (B) Erosional exhumation exposes a firm substrate.
(C) Colonization of the discontinuity surface by infauna occurs during a depositional hiatus.
(D) Burial of the firmground and filling of omission structures. Omission suite in this model is
attributable to the Glossifungites Ichnofacies. After MacEachern et al. (2007b ).
The ultimate test for differentiating autogenic erosion surfaces from
allogenic discontinuities is regional correlatability beyond the spatial limits
of any single depositional environment. Autogenic surfaces are limited to the
areal extent of the sedimentary environment that produced them and separate
genetically related facies successions. Allogenic discontinuities, on the other