2,883 research outputs found

    Ostracoda during the early Aptian (early Cretaceous) greenhouse period on the Isle of Wight, England

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    The earliest Aptian marine transgression of the Lower Cretaceous across southern England resulted in the collapse of the generally freshwater Barremian environment and the initiation of marine mileux. Salinities passed from fresh-oligohaline to meso- and pliohaline, reaching fully marine conditions during the obsoletum Subzone (P. fissicostus Zone). Newly formed environmental niches were rapidly occupied by ostracod associations. In the Isle of Wight, freshwater Cypridea-rich assemblages in the lower Shepherd's Chine Member (Vectis Formation) were gradually replaced by faunas dominated by Sternbergella cornigera, Mantelliana mantelli and Theriosynoecum fittoni. Marine taxa recorded from the Atherfield Clay Formation migrated predominantly from the Paris Basin and include Asciocythere albae, Schuleridea derooi, Neocythere gottisi, N. bordeti, Cythereis geometrica, Cytheropteron stchepinskyi and Protocythere croutesensis

    Micro-experimental analysis of the small-group reading lesson : social and cognitive consequences of silent reading

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    Includes bibliographical references (p. 18-20

    The stratigraphical distribution of Mid-Cretaceous foraminifera near Ventor, Isle of Wight

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    Ventnor No. 2 Borehole, located near Ventnor, Isle of Wight, penetrated the basal part of the Chalk Group and the Selborne Group before terminating in the upper part of the Lower Greensand Group (Sandrock Formation). The borehole was examined for Foraminifera, and although they were not seen in the Sandrock Formation and Monks Bay Sandstone Formation, the remainder of the borehole yielded moderately low diversity assemblages dominated by agglutinated species. Foraminiferal zones 3–6 (H dentatus to M. fallax/M. rostratum macrofaunal zones) were identified in the Gault Formation and zones 6 (lower) to 6a (M. fallax/M. rostratum to A. briacensis macrofaunal zones) were identified in the Upper Greensand Formation. Assemblages from the overlying West Melbury Marly Chalk Formation were used to identify foraminiferal zones BGS1-BGS3 (M. mantelli and M. dixoni macrofaunal zones)

    Life just got complicated

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    The fossil record of ancient life is, in general, poor. Certainly, fossils are abundant in many rock successions and may reveal remarkable details about evolution and environmental change, but they typically consist of disarticulated or broken skeletal material, such as shells, bones and teeth. Even worse, the record of entirely (or largely) soft-bodied organisms, such as jellyfish and worms, is extremely scant, despite the fact that such animals dominate modern marine environments and presumably did so in the past. The reason is obvious — such organisms are highly susceptible to post-mortem decay and typically decompose more rapidly than the ‘normal’ processes of fossilisation operate. This significantly blurs our view of ancient life, with obvious consequences for those interested in understanding evolution and past ecosystems

    Social Networks of Researchers in Business To Business Marketing: A Case Study of the IMP Group 1984-1999

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    Science is a social process that functions through social networks of researchers that form invisible colleges. Analysis of these social networks provides a means for examining the structure of relations among researchers. The Industrial Marketing and Purchasing (IMP) group, "an informal international group of scholars concerned with developing concepts and knowledge in the field of business-to-business marketing and purchasing," is used as a case study of a network of researchers because it has been responsible for considerable research over the last decades in the area of business-to-business marketing, yet its structure remains hidden because of its informal network characteristics. The results of a social network analysis of the IMP group is described based on the pattern of co-authorship at annual IMP conferences. The results reveal a power law distribution of paper co-authorship and a small world network that conforms to the results of studies of other types of social networks. A core network of 57 researchers is identified and its network properties are described, including how it has evolved over time. The study provides the basis for further studies of the social networks of marketing and business researchers.informal networks, business-to-business marketing

    Calcareous microfossils from laminated clay in an M1 cutting near Enderby Grange, Leicestershire

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    Laminated clay, which on field evidence was considered to be of Pleistocene age, contained marine and brackish marine microfossils reworked from the Triassic-lower Jurassic, Upper Cretaceous and Quaternary. Fresh water ostracods or diatoms were no observe

    Chalk biostratigraphy of the Wells-next-the-Sea district (1:50k Sheet 130) based on foraminifera

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    Samples from eleven sites in northern Norfolk extend from the latest Cenomanian and Turonian on the western margin of the Wells-next-the-Sea sheet, to the Campanian on the eastern Margin of the sheet. Foraminiferal zones (from which their macrofaunal equivalents can be inferred) can be assigned to most samples examined. Although certain key fossils in the Southern Chalk Province are missing, correlation is possible for most samples

    Microfossils from two samples of London Clay from the Harlow District (50K sheet 240)

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    Two samples of London Clay Formation were examined for their microfaunal content with a view to determine their biostratigraphical position. That from Roxwell (TL 657000 880000) contained foraminifera consistent with zones B, C and basal D. The sample from Hollingson Quarry (TL 453000 126000) was decalcified, but contained common diatoms preserved as pyrite indicative of Zone A to mid B
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