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The geology of the Pearl River Delta is rock sequences plus superficial sediments, emplaced in an alluvial delta, occupying the Pearl River Estuary. The unconsolidated sediments which dominate the delta are largely derived from continental materials exposed across the Pearl River basin, and range in size from fine particles such as mud to larger fragments like gravel.
A kame delta (or ice-contact delta, morainic delta [1]) is a glacial landform formed by a stream of melt water flowing through or around a glacier and depositing material, known as kame (stratified sequence of sediments) deposits. Upon entering a proglacial lake at the end (terminus) of a glacier, the river/stream deposit these sediments. This ...
About 8,000 years ago, the rate of sea-level rise slackened, allowing wetland plants to take hold in the Delta, trapping sediment; the growth and decay of these plants began to form the vast peat deposits that make up the Delta islands. The Delta reached a stabilized form similar to its mid-1800s state about 2,000–3,000 years ago. [11]
A tidal freshwater delta [33] is a sedimentary deposit formed at the boundary between an upland stream and an estuary, in the region known as the "subestuary". [34] Drowned coastal river valleys that were inundated by rising sea levels during the late Pleistocene and subsequent Holocene tend to have dendritic estuaries with many feeder tributaries.
Pages in category "Deltaic deposits" The following 112 pages are in this category, out of 112 total. This list may not reflect recent changes. A. Abrahamskraal Formation;
Moreover, mouth bar deposits offer a strategic location for the research projects regarding estuarine and delta restoration which makes them ideal for studying the effects of river sediment reduction and relative sea level rise and for estimating the evolution, including land loss and inundation, of the river deltas. [23]
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In the earth's history, after the Gulf of Mexico withdrew from what was Missouri, many floods occurred in the Mississippi River Delta, building up alluvial deposits. In some places the deposits measure 100 feet (30 m) deep. [7] The region was occupied by succeeding cultures of indigenous peoples for thousands of years.