A brief warming event in the late Albian: evidence from calcareous nannofossils, macrofossils, and isotope geochemistry of the Gault Clay Formation, Folkestone, southeastern England

Abstract

Abstract. This paper documents a warming event across the middle-upper Albian interval in a ∼ 22 m long section from the Gault Clay Formation of Copt Point, Folkestone (UK). Evidence for the event comes from three independent datasets: calcareous nannofossils, ammonites, and the bulk sediment carbon and oxygen stable isotope record, which collectively indicate a brief period (∼ 500 kyr) of significant surface water warming (in excess of 6 • C) at around 107.5 Ma (the base of the Dipoloceras cristatum Ammonite Zone). A surface water productivity increase based on high percentages of the eutrophic nannofossil Zeugrhabdotus noeliae is found to be concomitant with this warming event, suggesting that surface waters were nutrient-rich and the warming was associated with increased precipitation and run-off, delivering more nutrients into the basin.

Practical Application of the Mineralogical Mapping Method for Stratigraphy of the Cretaceous Deposits of Southern Primorye (Russian Far East)

“…The formation interval of the reddish-colored sediments of the Korkinskaya Series (upper part of the Romanovskaya suite) is 93-95 Ma (the epoch of lateritic weathering), which coincides with the Cenomanian-Turonian events (OAEs-Bonarelli event, C/T OAE, OAE2,~93 Ma, [41,42,46]). Similar stratification was also noted for the Cretaceous deposits of Europe [47][48][49], Venezuela [45], Northern Iraq [50], Japan [51][52][53][54], Polynesia [55], Tibet [56,57], the Arctic [58], and other regions of the world [59][60][61][62][63][64].…”

Cretaceous (Albian-Turonian) calcareous nannofossil biostratigraphy of the onshore Cauvery Basin, southeastern India

“…The Cauvery Basin assemblages exhibit a high-latitude character, evidenced by the consistent and common occurrence of Repagulum parvidentatum and Seribiscutum primitivum, though more pronounced in the lower Albian to lower Cenomanian section. Both of these taxa are well-known for their bipolar, highlatitude distribution in Boreal and Austral latitudes (Roth and Bowdler, 1981;Wise, 1983;Mutterlose, 1992;Watkins et al, 1996;Street and Bown, 2000;Lees, 2002;McAnena et al, 2013, Kanungo et al, 2018. These two taxa gradually become rare and sporadically distributed towards the upper part of the studied section (middle Cenomanian to lower Turonian) and can be related to the late Cenomanian-late Turonian warming phase in the Indian Ocean, which resulted in a southern shift in the Austral palaeobiogeographic zone (Lees, 2002).…”

Calcareous nannoplankton proxies for palaeoenvironmental reconstruction of the Albian–Cenomanian succession in North-western Israel (Mount Carmel Region)

“…10). The nannofossil data take into account SSTs derived from TEX 86 analyses (Forster et al, 2007;O'Brien et al, 2017) and were interpreted to trace supra-regional palaeoenvironmental conditions being similar to nannofossil datasets from other basins (e.g., Hardas et al, 2012;Kanungo et al, 2018). Two correlations are proposed and discussed herein.…”