Session 5. Shelf Facies
Care must be used in the application of studies of modern marine shelf deposits to interpreting ancient analogues because:-
Absence of vast epeiric seas at the present time;
Effect of eustatic glacial sea level changes
problem of relict fluvioglacial sediments on modern continental shelves,
subaerial cementation & erosion of subaqueous carbonates during glacial maxima. The topography of many modern carbonate barrier islands & reefs is not accretionary but erosional.
Irwin (1964) proposed a depositional model for epeiric seas which is applicable to both terrigenous and carbonate facies (Figure 36).
Figures & Tables
Concepts and Methods of Subsurface Facies Analysis
From an AAPG Short Course, this publication contains information and figures on sedimentary environments, lithology, physical processes of sedimentation, Lobate (Deltaic) shoreline facies, linear (Barrier) shoreline facies, shelf facies, and deep sea facies, as well as references for additional reading and research.