{"title":"Mesozoic and Cenozoic \"calcispheres\"- update in systematics.","authors":"D. Janofske, H. Keupp","doi":"10.58998/nina2128","DOIUrl":"https://doi.org/10.58998/nina2128","url":null,"abstract":"","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134318716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Archaeozygodiscus gen. nov. and other Triassic coccoliths.","authors":"P. Bown","doi":"10.58998/nina2029","DOIUrl":"https://doi.org/10.58998/nina2029","url":null,"abstract":"","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131127439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Longterm evolution of calcareous dinoflagellate associations since the Late Cretaceous.","authors":"M. Streng, T. Hildebrand-Habel, H. Willems","doi":"10.58998/jnr2233","DOIUrl":"https://doi.org/10.58998/jnr2233","url":null,"abstract":"","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"442 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131155330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA).","authors":"J. Self‐Trail","doi":"10.58998/jnr2219","DOIUrl":"https://doi.org/10.58998/jnr2219","url":null,"abstract":"A well-preserved Paleogene calcareous nannofossil assemblage taken from cored material of the sub- surface coastal plain of eastern Maryland, USA, is documented and described herein. Taxonomic and biostratigraphic analyses of 120 m of hemipelagic clays and silts have resulted in the identification of a nearly complete Paleocene/ Eocene section. A lithologic break is identified across the Marlboro Clay/Nanjemoy Formation boundary and the corresponding upper part of Zone NP10 is missing (from 54.37-53.61 Ma), representing a hiatus of 760,000 years. Assemblages are compared to other documented hemipelagic sequences worldwide, and biostratratigraphic taxon ranges are adjusted accordingly. Five new species (Braarudosphaera sequela, Daktylethra basilica, Ellipsolithus au- bryae, Hornibrookina weimerae, Pemma bybelliae) and one new combination (Neochiastozygus tenansa) are recorded.","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132661953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"INA Newsletter - Special edition London Meeting Abstracts.","authors":"S. V. van Heck","doi":"10.58998/nina2312","DOIUrl":"https://doi.org/10.58998/nina2312","url":null,"abstract":"","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"286 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131676548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Milankovitch versus chaos: opposing or complementary theories?","authors":"M. Cachão","doi":"10.58998/jnr2053","DOIUrl":"https://doi.org/10.58998/jnr2053","url":null,"abstract":"Introduction The analytical phase of quantitative Palaeoecology Palaeoceanography started in the middle seventies with the development of an hypothetical-deductive model which seeks to interpret and explain rhythmical patterns on high resolution proxy time series as a linear response to a global mechanism known as orbital forcing. Directly related to the theory proposed in the thirties by the Serbian mathematician and astronomer Milutin Milankovitch, according to this ~echanism Pleistocene glacial cycles, were produced by variations of the solar radiation flux reaching our planet (Berger et al., 1984). The notion that these variations could be related to cyclic geometric changes in the earth's orbit began with J. Adhemar, in 1842, who suggested that the main cause for the \"ice ages'' could be variations in the direction of earth's orbital axis and, consequently, in insolation (Berger & Pestiaux, 1984). Such theories usually assume that climate and the ecological systems in general have a linear response to the regular and periodic oscillatory behaviour of several Earth orbital parameters, i.e. the proxy data response from (palaeo )climate or (palaeo )oceanographic dynamics is more or less proportional to the magnitude of the orbitally induced periodic disturbance (lmbrie et al., 1984; Herterich & Sarnthein, 1984 ). This linear approach to Milankovitch theory will be referred to here as the ''Periodic behaviour model\" (Cachao, 1992). The search for numerical solutions for the equations that rule our planetary system goes back to the first attempts of the French mathematician Pierre Simon de La place to solve an important issue: the Solar System's stability. By making some simplifications La place showed that his simplified system was integrable and that there where long-term (tens ofth<;msands of years) periodicities (Murray, 1992). The present day values for the periodic variations of the maximum solar energy that reaches our planet correspond to one of the trigonometric solutions of the Lagrangean equations for the planetary movements, which are (Berger, 1984): 400 and 100 ka, periodicities associated with sinusoidal variations of the earth orbit eccentricity around the Sun; 41 ka, a period related. to variations on Earth rotation axis obliquity; 23 and 19 ka, both periods related to variations in the precession of the equinoxes. These values are only valid for an interval of time that goes back to -5 Ma (earliest Pliocene) due to inherent limitations to the calculations involved ( op. cit.) and to the existence of multiple disturbance factors such as solid tides, solar wind, and meteoritic showers (Buys & Ghil, 1984 ). So several corrections have been introduced and new values proposed (e.g. Berger et al., 1989) for other time intervals. Milankovitch frequencies result from the nonlinear interference of the several gravitational forces involved in movement of our planetary system. The importance in recognising these frequencies in our time seri","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114582348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proposed changes to the classification system of living Coccolithophorids.","authors":"R. Jordan, J. Young","doi":"10.58998/nina2136","DOIUrl":"https://doi.org/10.58998/nina2136","url":null,"abstract":"","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115055336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Sphaerocalyptra dermitzakii and Sphaerocalyptra youngii, two new holococcolithophore species from the Aegean Sea (eastern Mediterranean).","authors":"M. Dimiza, M. Triantaphyllou, S. Theodoridis","doi":"10.58998/jnr2080","DOIUrl":"https://doi.org/10.58998/jnr2080","url":null,"abstract":"","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116375923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Possible affinities between the holococcolithophores Syracosphaera pulchra HOL oblonga-type and Calyptrolithophora papillifera.","authors":"M. Triantaphyllou","doi":"10.58998/jnr2247","DOIUrl":"https://doi.org/10.58998/jnr2247","url":null,"abstract":"Several coccospheres, composed of typical Syracosphaera pulchra HOL oblonga-type body and apical coccoliths and a varying number of flat-topped coccoliths that resemble Calyptrolithophora papillifera, have been observed in samples from the Aegean Sea. The observed coccospheres indicate that the morphology of these two holococcolithophores may be less distinct than has been previously assumed.","PeriodicalId":186533,"journal":{"name":"Journal of Nannoplankton Research","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121921572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
