Malcolm B. Hart

TL;DR: Following votes by the Pliensbachian Working Group, the Jurassic Subcommission and the International Commission on Stratigraphy, IUGS rati.ed the proposed Global Boundary Stratotype Section and Point (GSSP) for the base of the lower Jurassic at the bottom of bed 73b in the Wine Haven section, Robin Hood's Bay, Yorkshire Coast, UK.

TL;DR: In this paper, the authors established a biostratigraphy and chemostratigy of the Natih Formation and reconstructed depositional conditions of organic-rich sediments in an intra-platform basin during Cenomanian-Turonian times.

TL;DR: In this paper, the characteristic rhythmic bedding of the Upper Cretaceous pelagic carbonate sequences of the United Kingdom is interpreted as the result of orbital variations, and a 23,000 year and a 41.500 year cycle have been recognized and can be used to confirm the dating of late Cenomanian events.

TL;DR: In this paper, high-resolution organic carbon profiles of six PETM sections in northern Spain are presented that span a transect from continental to marine environments and allow a comparison of the magnitude of the excursion, the shape of the vertical δ13Cδ 13C profile during the PETM episode, and the relative timing of the onset of the associated Carbon Isotope Excursion across a linked sediment routing system.

TL;DR: The negative carbon isotopes of the otoliths may point to a freshwater flow and potentially migratory nature of the marine environment as mentioned in this paper, given the large departures from equilibrium fractionation toward more negative carbon values reported from modern marine fi sh.