Open AccessLacustrine deltas and subaqueous fans: almost the same, but different – a review
Author(s) -
Beata Gruszka,
Tomasz Zieliński
Publication year - 2021
Publication title -
geologos
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.225
H-Index - 16
eISSN - 2080-6574
pISSN - 1426-8981
DOI - 10.2478/logos-2021-0004
Subject(s) - geology , sedimentary depositional environment , sedimentary rock , sedimentary structures , shore , geomorphology , structural basin , paleontology , oceanography
Although deltas and subaqueous fans are both formed in the same near-shore zones of basins, the hydraulic conditions for their formation, development and sedimentary records are different. The present review discusses the results of previously published studies of fan deltas (Gilbert-type deltas) and subaqueous fans of lacustrine and glaciolacustrine environments. The depositional mechanisms of deltas and subaqueous fans, textural and structural features of the lithofacies associations and their typical lithofacies are presented. The characteristics of subaqueous fans, which are still relatively poorly understood and are often overlooked in sedimentological interpretations of lacustrine sedimentary successions, receive particular attention. The palaeoenvironmental and lithological differences between deltas and sub-aqueous fans are highlighted.