Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun geology The growth of a
river delta farther out into thesea over time, as it gains moresediment .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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There can even be extension of the deltaic shoreline -- called progradation.
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During the last 40 years or so, changes in the regime of sediment discharge from the Sabaki River have led to major siltation and beach progradation in the vicinity of the resort town of Malindi.
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More information on the progradation of the Meander Delta:
Archive 2006-02-01 AYDIN 2006
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In this model, subsequent infilling of the lagoon occurs through successive phases of sand apron progradation -- with sediment sourced from the high carbonate productivity (and topographically elevated) rim.
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In contrast to the "bucket-fill" model, the primary mode of platform filling has occurred not through the development of the reef rim and subsequent export of sediment into the empty lagoon, but predominantly through reef progradation from the platform interior seaward.
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Commenting on the findings, New Scientist magazine noted, "Erosion of island shorelines must be reconsidered in the context of physical adjustments of the entire island shoreline, as erosion may be balanced by progradation on other sectors of shorelines."
FOXNews.com 2010
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