Architectural analysis of upper-shoreface deposits at intra-parasequence scale: different morphological configurations and possible controls

ISLA, M.F.; SCHWARZ, E.; VEIGA, G.D.

Toulouse

Congreso; 33rd IAS Meeting of Sedimentology; 2017

International Association of Sedimentologists

It is commonly assumed that parasequences are the expression of a unique depositional system, prograding trough time. This would imply that internal bedsets within a parasequence should be composed of similar facies associations. However, careful inspection of upper-shoreface (and foreshore?) deposits at intraparasequence scale in Cretaceous deposits of the Neuquén Basin revealed significant changes in the configuration of the nearshore system. The aim of this contribution is to describe different types of uppershoreface deposits within successive bedsets (of a single parasequence) in order to interpret changes inthe morphology of the costal setting and to discuss the mid-term evolution of Shallow marine systems.