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Ostracoda of the Early Jurassic Tethyan Ocean
1988The occurrence of ostracods in the Tethyan Ocean during early Jurassic times is reviewed with special reference to assemblage compositions in relation to contemporary geographical and oceano-graphical conditions. The Tethyan material is compared with the well-known and diverse early Jurassic assemblages from Northern and Western Europe and also with ...
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EARLY DIAGENESIS AND THE PRESERVATION OF POROSITY IN JURASSIC LIMESTONES
Journal of Petroleum Geology, 1978The study of Quaternary sediments has shown that carbonates are susceptible to early lithification, or to dissolution, in many different environments. Most of these surface effects, although reducing primary porosity, rarely destroy it completely. Although similar diagenetic phenomena also occur in ancient rocks, the great majority of limestones do ...
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Permo-Jurassic Cynodonts: The Early Road to Mammalness
2021The path to mammalness is well documented in the fossil record of Therapsida. Cynodontia is a group that includes living mammals and a series of stem fossil taxa that are individualized under the paraphyletic name of non-mammalian cynodonts. In this chapter I summarize the cynodont record of the late Permian, the post end-Permian extinction record and ...
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British Early Jurassic fossil reptile sites
1995Fossil reptiles have been found in numerous localities in the Mid Jurassic (Aalenian-Callovian) of southern England and west Scotland, but the most productive sources for reptiles are mainly in rocks of Bathonian and Callovian age. The typically shallow-water lagoonal and littoral marine facies of the Bathonian (e.g.
M. J. Benton, P. S. Spencer
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Early Jurassic bennettitalean reproductive structures of Romania
Palaeobiodiversity and Palaeoenvironments, 2014The Romanian Early Jurassic (Hettangian–Sinemurian) floras represent a key element of the Eurosinian Province in which the Williamsoniaceae (Bennettitales) are well represented by vegetative remains (leaves, stems, roots) and reproductive structures. Up to the present, Early Jurassic bennettitalean reproductive structures have been found at only two ...
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Polar temperature seasonality from the Early Jurassic
The phenomenon of polar amplification causes high-latitude warming to exceed the global mean and enhances seasonal variations in temperature and precipitation. As such, it complicates the understanding of both modern and past global warming impacts in polar regions.Barbora Krizova +7 more
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Methane release in the Early Jurassic period
Nature, 2006Paul B. Wignall +3 more
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Palaeoceanography: methane release in the Early Jurassic period.
Nature, 2006Dramatic global warming, triggered by release of methane from clathrates, has been postulated to have occurred during the early Toarcian age in the Early Jurassic period. Kemp et al. claim that this methane was released at three points, as recorded by three sharp excursions of delta13C(org) of up to 3 per thousand magnitude.
Paul B, Wignall +3 more
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