Discriminating intra-parasequence stratigraphic units from two-dimensional quantitative parameters

ABSTRACT The intra-parasequence scale is still relatively unexplored territory in high-resolution sequence stratigraphy. analysis of internal genetic units parasequences has commonly been simplified to the definition bedsets. Such simplification insufficient cover complexity involved building individual parasequences. Different types have previously identified and characterized successive wave-dominated shoreface–shelf Lower Cretaceous Pilmatué Member Agrio Formation central Neuquén Basin. Sedimentary stratigraphic attributes such as number units, their thickness, proportions facies associations regressive interval, lateral extent bounding surfaces, degree deepening recorded across these boundaries, type associated transgressive deposits are quantitatively analyzed this paper. Based on quantified attributes, three different scales identified. 1) Bedset complexes 10–40 m thick, basin upper-shoreface successions, bounded by 5 16 km-long surfaces with a one belts. These represent highest hierarchy vertical stacking two or them typically forms an parasequence. 2) Bedsets 2–20 offshore up 10 km long zero belt. Two bedsets stack vertically build bedset complex. 3) Sub-bedsets 0.5–5 transition 0.5 2 sub-bedsets form proposed methodology indicates that combination thickness proportion interval can be used discriminate between sub-bedsets, whereas for higher ranks (bedsets complexes) deepening, characteristics shell-bed become more effective. Finally, results compared other ancient Holocene examples improve understanding high-frequency evolution systems.