Journal of Geophysical Research: Earth Surface
© 2014 American Geophysical Union
Impact Factor: 3.174
ISI Journal Citation Reports © Ranking: 2012: 23/170 (Geosciences Multidisciplinary)
Online ISSN: 2169-9011
Associated Title(s): Journal of Geophysical Research
Water and sediment supply affect basin-filling sedimentation patterns
The spatial and temporal variability of sedimentation can affect models that scientists use to interpret the stratigraphic record. To better understand the influence of sedimentation variability, Straub and Wang quantify basin-filling trends in three experiments with fluvial deltaic systems experiencing subsidence. They note that sediment fills some basins randomly, while in other basins sediment fills in an even, structured way.
The authors characterize the evenness with which the basins fill through a measure they call the “compensation index,” which tracks the tendency of flow deposits to preferentially fill in topographic lows. They show that the compensation index depends on the ratio between water input and sediment discharge. The study could help scientists better interpret stratigraphy in sedimentary settings.