T02 - Shallow-marine clastics

T02-SS01 Gateways, straits and seaways: their sedimentology and stratigraphy importance to understand basins evolution

Conveners: Olariu C. (University of Texas, USA), Rossi V.M. (National Research Council of Italy, Institute of Geosciences Georesources, Italy)

Most sedimentary basins have narrow or partial connections with other basins during at least part of their evolution, commonly during their initial “opening” and ocean flooding, or at their demise when the connection with the ocean is lost. Connections between basins can be (1) gateways, small temporary connections; (2) straits, with variable widths and depths but with strong currents created by water exchange between basins; or (3) seaways, large areas with neritic depths that connects two bathyal basins. The recently developed source-to-sink approach emphasizes that sediment source areas, transfer zones and depositional sinks are interconnected and that we need to consider their integrated evolution. However, the often disregarded gateways, straits and seaway are key to fully understand the evolution of complex sedimentary basins, which requires taking into account the links between sedimentary systems in adjacent basins. Despite the importance of gateways, straits and seaways, which are fundamental in terms of water, sediment and biotas transfer from one basin to another, and may affect their paleoecology, sedimentology and stratigraphy, there are limited studies on these basin-connection processes and deposits. To this session, we invite contributions on modern, ancient, and experimental studies of interconnected basins and their connecting gateways, straits and seaways that aim to meaningfully bridge a gap of knowledge in our current understanding of basin interaction.
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