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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Europe
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Southern Europe
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Italy
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Emilia-Romagna Italy (1)
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geologic age
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Cenozoic
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Quaternary
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upper Quaternary (1)
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Primary terms
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Cenozoic
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Quaternary
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upper Quaternary (1)
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earthquakes (1)
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Europe
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Southern Europe
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Italy
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Emilia-Romagna Italy (1)
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sediments
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clastic sediments
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sand (1)
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soil mechanics (1)
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sediments
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sediments
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clastic sediments
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sand (1)
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Sand Liquefaction Induced By a Blast Test: New Insights On Source Layer and Grain-Size Segregation Mechanisms (Late Quaternary, Emilia, Italy)
Upper Triassic (Rhaetic) Argillaceous Sequences in Northern Italy: Depositional Dynamics and Source Potential
Abstract Upper Triassic (Rhaetic), thick, argillaceous deposits are the source of important Italian hydrocarbon accumulations. This study integrates sedimentology, paleoecology, and both organic and inorganic geochemistry to determine the genesis and source potential of these marine deposits, which are ascribed to two depositional sequences. The first Rhaetic transgression was associated with an interruption of carbonate production and with a strong increase in the preservation of organic carbon. Deposition of these sequences was controlled by interactions between carbonate and terrigenous sediment sources, under the influence of high-frequency eustatic fluctuations. Most of these organic-rich Rhaetic successions are presently overmature and appear to have entered the oil window during Mesozoic time, prior to trap-forming tectonics. Important exceptions are represented by Mesozoic paleohigh areas, where Triassic deposits reached maturity in the Neogene, or are still immature.