Controls on carbonate-siliciclastic relationships in quaternary deposits of the Midyan coast of the Gulf of Aqaba, Saudi Arabia

Quaternary deposits of the Midyan coast Saudi Arabia include coral-bearing limestones interbedded with sheet-flow siliciclastic sands and gravels, interpreted as braid-delta fan deposits. The their contained faunas provide evidence periodic local stabilization gravel surfaces effective starvation supply. Some indicate growth deposition in waters a metre or so deep whereas others were substantially deeper. An additional group reflects initial shallow resedimentation downslope by storm other ‘delta-front’ processes. fans provided morphological environmental analogues to fore- back-reef situations which corals, calcareous coralline algae, molluscs, echinoderms flourished, but this area did not form independent reefs. dominant controls on changes from siliciclastic- carbonate-dominated transitional, primarily related channel fan-lobe migration rather than tectonic eustatic sea level changes. Similar variations distribution sediments may control carbonate occurrence mixed sequences.