Matches in SemOpenAlex for { <https://semopenalex.org/work/W2950824650> ?p ?o ?g. }
- W2950824650 endingPage "109238" @default.
- W2950824650 startingPage "109238" @default.
- W2950824650 abstract "The Cenomanian/Turonian (C/T) boundary interval, spanning the upper part of the Sarvak Formation in the Zagros Basin (Izeh Zone), has been studied to determine the timing and the possible cause of biotic turnovers, coinciding with the intense environmental perturbations during the Oceanic Anoxic Event 2 (OAE2). The upper Cenomanian strata in the study section, composed of light-colour marlstone/organic-rich marlstone and shale bedding couplets, record fluctuations in microfossil assemblages and organic carbon contents. We suggest that the organic-poor layers, characterized by high abundance of radiolarians, were deposited during cold periods under surface water eutrophication (upwelling) and ventilated seafloor. In contrast, water column stratification during warm periods enhanced organic matter preservation and allowed deposition of organic-rich strata. Continued stratification and also increased runoff and primary productivity during warm intervals of OAE2 led to expansion of oxygen minimum zone (OMZ), which may have caused extinctions of deep followed by intermediate water planktic foraminifera. Such conditions may have led to significant decreases in the abundance and diversity of planktic foraminifera and dominance of the biserial genus Planoheterohelix (“Heterohelix” shift event). The δ13C curve in the study interval reveals the diagnostic features of global C/T boundary carbon isotope record, including three positive peaks (A, B and C) within the Whiteinella archaeocretacea Biozone. These carbon isotope features and the most important bioevents in the study section are stratigraphically listed below: 1- Highest occurrences (HOs) of Th. greenhornensis and Th. deeckei, 2- HO of R. cushmani and δ13C peak A, 3- HO of “G”. bentonensis, 4- Onset of “Heterohelix” shift event, 5- δ13C peak B, 6- δ13C peak C, 7- Filament event, 8- Lowest occurrence (LO) of H. helvetica, and 9- Holywell event." @default.
- W2950824650 created "2019-06-27" @default.
- W2950824650 creator A5067481267 @default.
- W2950824650 creator A5073580905 @default.
- W2950824650 date "2019-11-01" @default.
- W2950824650 modified "2023-10-17" @default.
- W2950824650 title "The Cenomanian/Turonian boundary interval deep-sea deposits in the Zagros Basin (SW Iran): Bioevents, carbon isotope record and palaeoceanographic model" @default.
- W2950824650 cites W1507201230 @default.
- W2950824650 cites W1574791152 @default.
- W2950824650 cites W1590712330 @default.
- W2950824650 cites W1620286502 @default.
- W2950824650 cites W1669484540 @default.
- W2950824650 cites W1753926244 @default.
- W2950824650 cites W1845236820 @default.
- W2950824650 cites W1964126829 @default.
- W2950824650 cites W1964919421 @default.
- W2950824650 cites W1965193437 @default.
- W2950824650 cites W1967827160 @default.
- W2950824650 cites W1968318197 @default.
- W2950824650 cites W1973978619 @default.
- W2950824650 cites W1974459364 @default.
- W2950824650 cites W1974483261 @default.
- W2950824650 cites W1975574672 @default.
- W2950824650 cites W1976630555 @default.
- W2950824650 cites W1977535353 @default.
- W2950824650 cites W1983226641 @default.
- W2950824650 cites W1986032233 @default.
- W2950824650 cites W1986657975 @default.
- W2950824650 cites W1992201276 @default.
- W2950824650 cites W1992688219 @default.
- W2950824650 cites W2000169668 @default.
- W2950824650 cites W2001203583 @default.
- W2950824650 cites W2002758589 @default.
- W2950824650 cites W2003111565 @default.
- W2950824650 cites W2005341723 @default.
- W2950824650 cites W2007236147 @default.
- W2950824650 cites W2008439316 @default.
- W2950824650 cites W2009220556 @default.
- W2950824650 cites W2010643622 @default.
- W2950824650 cites W2012386486 @default.
- W2950824650 cites W2018057983 @default.
- W2950824650 cites W2020107782 @default.
- W2950824650 cites W2021787217 @default.
- W2950824650 cites W2021874896 @default.
- W2950824650 cites W2026415499 @default.
- W2950824650 cites W2027340482 @default.
- W2950824650 cites W2029506902 @default.
- W2950824650 cites W2029585508 @default.
- W2950824650 cites W2030451450 @default.
- W2950824650 cites W2033535608 @default.
- W2950824650 cites W2039609237 @default.
- W2950824650 cites W2040832690 @default.
- W2950824650 cites W2043074624 @default.
- W2950824650 cites W2047537726 @default.
- W2950824650 cites W2048913868 @default.
- W2950824650 cites W2049369352 @default.
- W2950824650 cites W2049736641 @default.
- W2950824650 cites W2052418452 @default.
- W2950824650 cites W2052890387 @default.
- W2950824650 cites W2054225764 @default.
- W2950824650 cites W2054340203 @default.
- W2950824650 cites W2056670043 @default.
- W2950824650 cites W2057480651 @default.
- W2950824650 cites W2061430449 @default.
- W2950824650 cites W2061680126 @default.
- W2950824650 cites W2061702879 @default.
- W2950824650 cites W2070364820 @default.
- W2950824650 cites W2076217033 @default.
- W2950824650 cites W2077385741 @default.
- W2950824650 cites W2077676446 @default.
- W2950824650 cites W2079305132 @default.
- W2950824650 cites W2079548990 @default.
- W2950824650 cites W2079868285 @default.
- W2950824650 cites W2080498491 @default.
- W2950824650 cites W2085827614 @default.
- W2950824650 cites W2088686393 @default.
- W2950824650 cites W2088769442 @default.
- W2950824650 cites W2089294264 @default.
- W2950824650 cites W2093059308 @default.
- W2950824650 cites W2093819994 @default.
- W2950824650 cites W2097547447 @default.
- W2950824650 cites W2098066131 @default.
- W2950824650 cites W2106229214 @default.
- W2950824650 cites W2108570205 @default.
- W2950824650 cites W2117913067 @default.
- W2950824650 cites W2125844465 @default.
- W2950824650 cites W2133016813 @default.
- W2950824650 cites W2133749899 @default.
- W2950824650 cites W2136419158 @default.
- W2950824650 cites W2138639295 @default.
- W2950824650 cites W2141458985 @default.
- W2950824650 cites W2141614982 @default.
- W2950824650 cites W2143651742 @default.
- W2950824650 cites W2147626355 @default.
- W2950824650 cites W2149664401 @default.
- W2950824650 cites W2151375251 @default.
- W2950824650 cites W2152714519 @default.
- W2950824650 cites W2163015998 @default.