is a branch of geology
that attempts to subdivide and link sedimentary
deposits into unconformity
bound units on a variety of scales and explain these stratigraphic
units in terms of variations in sediment supply and variations in the rate of change in accommodation space (often associated with changes in relative sea level). The essence of the method is mapping of strata
based on identification of surfaces which are assumed to represent time lines (e.g. subaerial unconformities, maximum flooding surfaces), and therefore placing stratigraphy in chronostratigraphic
framework. Sequence stratigraphy is a useful alternative to a lithostratigraphic
approach, which emphasizes similarity of the lithology
of rock units rather than time significance.
The 'sequence' part of the name refers to cyclic sedimentary deposits
. The term 'stratigraphy
' refers to the geologic knowledge about the processes by which sedimentary deposits form and how those deposits change through time and space on the Earth's surface.
Sequence boundaries are deemed the most significant surfaces.Hampson, G.J., Davies, S. J., Elliott, T., Flint, S. S. & Stollhofen, H. 1999. Incised valley fill sandstone bodies in Upper Carboniferous fluvio-deltaic strata: recognition and reservoir characterisation of Southern North Sea analogues. In: Petroleum Geology of NW Europe: Proceedings of the 5th Conference. (Edited by... Read More