Controls on the apex location of large deltas

Adrian J. Hartley, Gary S. Weissmann, Louis Scuderi

Research output: Contribution to journalArticle

12 Citations (Scopus)
11 Downloads (Pure)

Abstract

The majority of sediment transport to the world's oceans is routed via large deltas. We examine controls on delta apex location using a database of 84 of the world's largest deltas. Of the dataset, 94% of apices are controlled by either bedrock valleys (80%) or Pleistocene alluvial valleys (14%), suggesting that the principal control on modern apex development is valley exit and/or bedslope-mediated avulsion and not hydrodynamic backwater length. Valley exit control on large delta apex location may have been as important in the rock record as it is today, and should be considered as a key control on delta development.
Original languageEnglish
Pages (from-to)10-13
Number of pages4
JournalJournal of the Geological Society
Volume174
Early online date7 Oct 2016
DOIs
Publication statusPublished - Jan 2017

Keywords

  • delta
  • apex
  • backwater length
  • valley
  • avulsion
  • river

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