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A cuspate deltaic lobe involves the creation and subsequent abandonment of deltaic lobe cusps to create unique linear delta formations. The cuspate deltaic lobe is defined by its abrupt rate of discharge from river to body of water, and the creation of multiple cusp systems built up into separate but active distributaries.
A Gilbert delta (named after Grove Karl Gilbert) is a type of fluvial-dominated [24] delta formed from coarse sediments, as opposed to gently sloping muddy deltas such as that of the Mississippi. For example, a mountain river depositing sediment into a freshwater lake would form this kind of delta.
The presence of dunes shows that the planet has an atmosphere with wind, for dunes require wind to pile up the sand. Most dunes on Mars are black because of the weathering of the volcanic rock basalt. [79] [80] Black sand can be found on Earth on Hawaii and on some tropical South Pacific islands. [81]
Cuspate forelands, also known as cuspate barriers or nesses in Britain, are geographical features found on coastlines and lakeshores that are created primarily by longshore drift. [1] Formed by accretion and progradation of sand and shingle, they extend outwards from the shoreline in a triangular shape.
The atmosphere of Mars contains a great deal of fine dust particles. Water vapor condenses on the particles, then the heavier particles with the water coating fall and pile up on the ground. When ice at the top of the mantling layer goes back into the atmosphere, it leaves behind dust, which insulates the remaining ice.
Sediment erosion and deposition dynamics in estuarine region, consequently the formation and growth of mouth bars, are affected by several natural and artificial factors. . Human activities, such as reservoir construction, large-scale reclamation and embankment construction completely disturb the hydrodynamic balance of the system and permanently interfere with the morphology of mouth bars.
The Mississippi River Delta is the 7th largest river delta on Earth and is an important coastal region for the United States, containing more than 2.7 million acres (4,200 sq mi; 11,000 km 2) of coastal wetlands and 37% of the estuarine marsh in the conterminous U.S. [1] The coastal area is the nation's largest drainage basin and drains about ...
They can be found all over the world and are most noticeable on shorelines with coarser sediment such as pebble beaches. However, they can occur with sediment of any size. They nearly always occur in a regular pattern with cusps of equal size and spacing appearing along stretches of the shoreline. These cusps are most often a few metres long.