FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2034318321> ?p ?o ?g. }

• W2034318321 endingPage "169" @default.
• W2034318321 startingPage "128" @default.
• W2034318321 abstract "Abstract Ancient fluvial valley systems are long recognized as important features in the stratigraphic record, but emerged as a specific focus of attention with publication of first-generation sequence-stratigraphic concepts. This paper reviews current understanding of paleovalley systems from the perspective of Quaternary analogs and experimental studies. Paleovalley systems can include distinct mixed bedrock–alluvial, coastal-plain, and cross-shelf segments. Mixed bedrock–alluvial segments are long-lived, cut across bedrock of significantly older age, and have an overall degradational architecture. By contrast, coastal-plain and cross-shelf segments are non-equilibrium responses to high-frequency cycles of relative sea-level change: most coastal-plain and cross-shelf segments form as a geometric response to relative sea-level fall, as river systems cut through coastal-plain and inner shelf clinothems, and extend basinward to track the shoreline. After incision and cross-shelf extension, lateral channel migration and contemporaneous channel-belt deposition creates a valley-scale feature. Coastal-plain and cross-shelf paleovalley widths are set by the number of channel-belt sandbodies deposited during this time. Paleovalley systems play a key role in source-to-sink sediment routing. Early views included the model of incision and complete sediment bypass in response to relative sea-level fall. However, this model does not stand up to empirical, theoretical, or experimental scrutiny. Instead, there is a complex dynamic between incision, deposition, and sediment export from an evolving valley: periods of incision correspond with sediment export minima, whereas periods of lateral migration and channel-belt construction result in increased flux to the river mouth. Sediment export from evolving valleys, and merging of drainages during cross-shelf transit, play key roles in sediment transfer to the shelf-margin and genetically-linked slope to basin-floor systems. Connection between the river mouth and the shelf margin likely occurs for different periods of time depending on gradient of the river and shelf, as well as amplitude of high-frequency sea-level changes. Late Quaternary analogs and experimental studies provide an alternative sequence-stratigraphic interpretation for paleovalley systems. In coastal-plain paleovalleys, basal valley-fill surfaces meet criteria for an unconformity and a classically-defined sequence boundary: however, this surface is mostly everywhere of the same age as overlying fluvial deposits, and does not correspond to a long period of incision and sediment bypass. In cross-shelf paleovalleys, the basal contact between fluvial and deltaic or shoreface deposits is commonly interpreted as a sequence boundary, but is not an unconformity characterized by incision and sediment bypass. Instead, this surface is a facies contact that separates genetically-related fluvial and deltaic strata: the surface that correlates to the basal valley-fill surface within the coastal-plain paleovalley dips below cross-shelf prograding deltaic and/or shoreface strata, which are fed by deposition within the evolving valley itself, and should be the downlap surface. Many issues deserve attention in the future. We have stressed understanding the inherent scales and physical processes that operate during the formation and evolution of paleovalley systems. We also suggest the relative roles of allogenic forcing vs. autogenic dynamics, and the potential significance of high-frequency isostatic adjustments should be topics for future discussion." @default.
• W2034318321 created "2016-06-24" @default.
• W2034318321 creator A5026992674 @default.
• W2034318321 creator A5036695352 @default.
• W2034318321 creator A5037238607 @default.
• W2034318321 creator A5076721699 @default.
• W2034318321 date "2013-01-01" @default.
• W2034318321 modified "2023-10-06" @default.
• W2034318321 title "Paleovalley systems: Insights from Quaternary analogs and experiments" @default.
• W2034318321 cites W1483157968 @default.
• W2034318321 cites W1565234983 @default.
• W2034318321 cites W1579624063 @default.
• W2034318321 cites W1594270332 @default.
• W2034318321 cites W1606765290 @default.
• W2034318321 cites W1857814390 @default.
• W2034318321 cites W1965580119 @default.
• W2034318321 cites W1966265779 @default.
• W2034318321 cites W1967238325 @default.
• W2034318321 cites W1968796659 @default.
• W2034318321 cites W1970130975 @default.
• W2034318321 cites W1970467408 @default.
• W2034318321 cites W1970669097 @default.
• W2034318321 cites W1974224047 @default.
• W2034318321 cites W1974360698 @default.
• W2034318321 cites W1976210041 @default.
• W2034318321 cites W1976999412 @default.
• W2034318321 cites W1977594215 @default.
• W2034318321 cites W1978665657 @default.
• W2034318321 cites W1979008106 @default.
• W2034318321 cites W1981662873 @default.
• W2034318321 cites W1990426897 @default.
• W2034318321 cites W1991129484 @default.
• W2034318321 cites W1991984045 @default.
• W2034318321 cites W1993999355 @default.
• W2034318321 cites W1995253200 @default.
• W2034318321 cites W1995834340 @default.
• W2034318321 cites W1996520078 @default.
• W2034318321 cites W1996660327 @default.
• W2034318321 cites W1996720026 @default.
• W2034318321 cites W2000325063 @default.
• W2034318321 cites W2000405336 @default.
• W2034318321 cites W2000490262 @default.
• W2034318321 cites W2000944808 @default.
• W2034318321 cites W2001888021 @default.
• W2034318321 cites W2003162421 @default.
• W2034318321 cites W2003868383 @default.
• W2034318321 cites W2005282721 @default.
• W2034318321 cites W2007912311 @default.
• W2034318321 cites W2009976046 @default.
• W2034318321 cites W2010348467 @default.
• W2034318321 cites W2011895665 @default.
• W2034318321 cites W2012403322 @default.
• W2034318321 cites W2013360735 @default.
• W2034318321 cites W2016315539 @default.
• W2034318321 cites W2017596128 @default.
• W2034318321 cites W2019020686 @default.
• W2034318321 cites W2021041237 @default.
• W2034318321 cites W2021800930 @default.
• W2034318321 cites W2022184277 @default.
• W2034318321 cites W2022545034 @default.
• W2034318321 cites W2022558214 @default.
• W2034318321 cites W2024369723 @default.
• W2034318321 cites W2026886308 @default.
• W2034318321 cites W2027776215 @default.
• W2034318321 cites W2028265916 @default.
• W2034318321 cites W2031521881 @default.
• W2034318321 cites W2034023444 @default.
• W2034318321 cites W2038001742 @default.
• W2034318321 cites W2038083194 @default.
• W2034318321 cites W2038178933 @default.
• W2034318321 cites W2038608287 @default.
• W2034318321 cites W2039030972 @default.
• W2034318321 cites W2039295782 @default.
• W2034318321 cites W2039527127 @default.
• W2034318321 cites W2040832270 @default.
• W2034318321 cites W2044946456 @default.
• W2034318321 cites W2046404350 @default.
• W2034318321 cites W2046888137 @default.
• W2034318321 cites W2047369299 @default.
• W2034318321 cites W2048085266 @default.
• W2034318321 cites W2050440902 @default.
• W2034318321 cites W2053680284 @default.
• W2034318321 cites W2054076608 @default.
• W2034318321 cites W2054127992 @default.
• W2034318321 cites W2054573382 @default.
• W2034318321 cites W2056636229 @default.
• W2034318321 cites W2058248281 @default.
• W2034318321 cites W2061862230 @default.
• W2034318321 cites W2066288156 @default.
• W2034318321 cites W2067628429 @default.
• W2034318321 cites W2068724623 @default.
• W2034318321 cites W2070370343 @default.
• W2034318321 cites W2071127688 @default.
• W2034318321 cites W2071947072 @default.
• W2034318321 cites W2072433832 @default.
• W2034318321 cites W2075992945 @default.
• W2034318321 cites W2076460306 @default.
• W2034318321 cites W2076487622 @default.

• next