Premium
Size—frequency distribution of longitudinal dune rippled flank sands compared to that of slipface sands of various dune types
Author(s) -
SNEH AMIHAI,
WEISSBROD TUVIA
Publication year - 1983
Publication title -
sedimentology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 108
eISSN - 1365-3091
pISSN - 0037-0746
DOI - 10.1111/j.1365-3091.1983.tb00705.x
Subject(s) - geology , sorting , flank , geomorphology , population , demography , sociology , computer science , anthropology , programming language
Rippled flanks of longitudinal dunes and the slip faces of various dune types can be distinguished granulometrically by comparing the top to bottom trend of changes of sorting in the sand population of each individual slope. Flank sands, which are prone to sorting processes through migration of ripples alongslope, are always better sorted upslope whereas slipface sands, which are controlled by avalanche and grainfall of sands, become better sorted downslope. Considering the absolute values of the bottom samples, the sands of the slip faces are both better sorted and the size distribution more symmetrical than those of the rippled flanks. Applying this approach in investigating ancient sediments could improve palaeogeographical interpretations.