Questions of how shorefaces
respond to relative rises in sea level are of paramount importance for
predicting morphosedimentary response to rising global sea level. In this
study, Gzam and others examine a
suite of beach ridges along the Tunisian coast to better understand their
genesis and dynamics. The results, which integrate petrographic and facies
analysis, transverse profile surveys, and field observations, suggest that
these progradational, Mid-Holocene to recent beach ridges formed during periods
of relative highs in sea level. The data also reveal that the modern beach
ridge is composed mainly of shell debris, whereas the Holocene succession
consists of siliciclastic sand, suggesting that beach ridges were nourished
from two distinctive sediment sources.
Genesis and evolution of a beach-ridge plainreflecting relative sea-level rise: a case study from Trab El Makhadha, Gulf ofGabes, southeastern Tunisia by Maher
Gzam, Noureddine Elmejdoub, Soumaya Boussetta, and Younes Jedoui
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