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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.
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 ...
The Mississippi River Delta, showing the sediment plumes from the Mississippi and Atchafalaya Rivers, 2001. The modern Mississippi River Delta formed over the last approximately 4,500 years as the Mississippi River deposited sand, clay and silt along its banks and in adjacent basins.
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.
This process is also known as delta switching. Deposition from the river results in the formation of an individual deltaic lobe that pushes out into the sea. An example of a deltaic lobe is the bird's-foot delta of the Mississippi River , pictured at right with its sediment plumes.
Sediment cores reveal that the Thousand Islands were formed when a storm-driven sea broke through the barrier island, leaving behind an approximately 900-acre (360 ha) flood tide delta deposit. The date of this event is unknown. Charts from the mid 19th century and older do not depict the Thousand Islands.
However, with the continuous melting of the glacier, the kame delta eventually collapses onto the land surface, furthering the "kame and kettle" topography. Kame terraces are frequently found along the side of a glacial valley and are stratified deposits of meltwater streams flowing between the ice and the adjacent valley side. [4]
Jezero on the edge of the Isidis basin. Jezero [a] (ICAO: JZRO) is a crater on Mars in the Syrtis Major quadrangle, [3] about 45.0 km (28.0 mi) in diameter. Thought to have once been flooded with water, the crater contains a fan-delta deposit rich in clays. [4]