The stratigraphic record
represents the net product of a combination of autogenic and allogenic
processes, and deciphering the relative roles of each has proven challenging. Here,
Simms and Rodriguez examine the influence of tributary junctions on the rate of
shoreline progradation of bayhead deltas during sea-level fall. Using a simple
numerical model that incorporates downstream changes in valley geomorphology
under conditions of constant rate of sea-level fall and sediment supply, the
data reveal that as bayhead deltas merge, the estuarine shoreline migrates
seawards at increased rates. The results provide novel insights into the
architecture of strata deposited during relative falls in sea level.
The influence of valley morphology on the rate of bayhead delta progradation by Alexander R. Simms and
Antonio B. Rodriguez
No comments:
Post a Comment