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416M_delta - DEPOSITIONAL SYSTEMS DELTAIC SYSTEMS RIVER...

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DEPOSITIONAL SYSTEMS DELTAIC SYSTEMS RIVER DOMINATED DELTAS WAVE DOMINATED DELTAS TIDE DOMINATED DELTAS
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DELTAS Herodotus (c. 400 BC) - thought the alluvial plain at mouth of Nile looked like a D Barrell (1912) - described the ancient (Devonian) Catskill Delta and defined a delta as "a deposit partly subaerial built by a river into or against a body of permanent water. The outer and lower parts are necessarily constructed below water level, but its upper and inner surface must be land maintained . . . by a river . . . therefore consists of a combination of terrestrial and marine, or at least lacustrine strata.“ So sediment transport by a RIVER is key to having a delta.
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Nile Delta Wave Dominated
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WATER INFLOW HYPOPYCNAL FLOW: INFLOW LESS DENSE HOMOPYCNAL FLOW: SAME DENSITY HYPERPYCNAL FLOW: INFLOW DENSER
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HYPERPYNCAL FLOW
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USC WEB
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HOMOPYCNAL FLOW
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GILBERT DELTA (PLIOCENE, ITALY)
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HYPOPYCNAL FLOW
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USC WEB
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Mississippi Delta classification scheme based on processes controlling coastline morphology
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SUTER (2010
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Framework Facies in Major Delta Types
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Po Delta Fluvial + Wave
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