mouth bar

plural mouth bars

1. geographyA bar that forms in the middle of an estuary or of a channel in a river delta.

   In the axial zone of delta mouth bars, fluvial processes dominate.

   1991, D. J. P. Swift, S. Phillips, J. A. Thorne, “Sedimention on continental margins, IV: lithofacies and depositional systems”, in D. J. P. Swift, G. F. Oertel, R. W. Tillman, J. A. Thorne, editors, Shelf Sand and Sandstone Bodies: Geometry, Facies and Sequence Stratigraphy, Blackwell Scientific, page 110

   2 more examples

   1980 [Burgess Publishing], George deVries Klein, Sandstone Depositional Models for Exploration for Fossil Fuels, 2nd Edition, 1982, International Human Resources Development Corp., page 111, The best targets for exploration for oil and gas in deltas are the distributary mouth bar sand complexes and the destructive-phase, transgressive barrier sands.

   2017, Yong He, Chen Lu, Jiaquan Deng, Yugui Yang, Liuzhu Yang, Evolution of Modaomen Bar at Pearl River Esuary, Silke Wieprecht, Stefan Haun, Karolin Weber, Markus Noack, Kristina Terheiden (editors), River Sedimentation: Proceedings of the 13th International Symposium on River Sedimentation, Taylor & Francis (CRC Press), page 212, The mouth bar is located at the key part of the river estuary. […] At the beginning of the 20th century, the mouth bar is at the Hengzhou-Dajingjiao Gorge. […] At present, the mouth bar is located at the south side of the Jiaobeisha-Shilansha line.