Showing papers in "Palaeogeography, Palaeoclimatology, Palaeoecology in 2006"

TL;DR: In this article, the authors compared the upwelling and anoxic environments of the C/T black shales and sapropels and concluded that the major driving force for the widespread occurrence of these shales seems to be the increase in volcanic activity and associated CO2-input throughout the Cretaceous.

TL;DR: The origin of modern vent-seep biota has been attributed to either enhanced accumulation of Paleozoic and Mesozoic relics, or migration of various invertebrate groups into vent and seep environments during the Phanerozoic as discussed by the authors.

TL;DR: A review of the strength and weaknesses of Sr/Ca and δ18O tracers is presented in this paper, together with some examples of SST and SSS reconstructions of coral aragonite.

TL;DR: In this article, a review of the climatic controls and feedbacks in northwestern South America and the southern Isthmus is detailed in terms of major hydro-climatic controls, supported by evidence from station records, reanalysis data and satellite information.

TL;DR: Dercourt et al. as mentioned in this paper reconstructed the palaeogeographic evolution of the Paratethyan and Mediterranean realms with three maps ranging from the Late Miocene to the Middle-Late Pliocene.

TL;DR: In addition to patterns of phylogenetic diversification, the fossil record of angiosperm flowers provides insights into the timing of floral evolution in terms of the functions of the various kinds of floral organs, as well as accompanying patterns of ecological diversification.

TL;DR: Menning et al. as mentioned in this paper proposed a global Stratigraphic Reference Scale (GSS) for the analysis of the evolution of the Late Palaeozoic in the light of sedimentary geochemistry.

TL;DR: In this paper, the authors summarize new and previously published data on the river-derived terrigenous fraction of Cariaco Basin sediments, as well as comparisons to other paleoclimate records, which together suggest a coherent climatologic response in the tropical Atlantic triggered by a pattern of ITCZ migration that mimics the seasonal cycle.

TL;DR: The authors of as mentioned in this paper show that Africa was an important center of origin of various placental clades, including the African Faunal Strata (AFSs), in the early Cretaceous and the early Miocene.

TL;DR: Understanding the extinction and recovery processes in ancient events, especially those associated with global warming, may be crucial to managing the present biodiversity crisis.

TL;DR: Spores of the dung fungus Sporormiella are abundant in lake and cave sediment where livestock are plentiful in the western United States during the historic period as mentioned in this paper, reaching values of 2-4% in Pleistocene samples from lake sediments.

TL;DR: In this paper, a range of tectonic studies suggest that the northern and eastern parts of the plateau are younger geomorphological features, but there are few quantitative constraints of the timing of elevation from these regions of Tibet, and there is a remarkable unanimity amongst the diverse techniques applied that the altitude of the southern plateau has not significantly changed since at least the mid Miocene ( ca. 15 Ma) arguing for an onset of the monsoon system during or before the early Miocene.

TL;DR: In this paper, a model involving the cascading development of γ (interprovincial), β (intercommunity) and α (intra-community) diversity highlights the interplay between ecology, environment, geography and adaptive strategy during the event.

TL;DR: In this article, the authors use mean plant-eater hypsodonty (molarcrown height) of late NeogenemammallocalitiestomaplateMiocene and Pliocenepalaeoprecipitation on the Eurasian continent and, with higher temporal resolution, in Europe.

TL;DR: In this article, the tropical South American LGM data were interpreted from pollen, geochemical, and δ18O (stable oxygen isotope) data from Brazil and selected surrounding areas and the available terrestrial data were consistent with the SST derived precipitation data for the tropical forests in Brazil and for Africa.

TL;DR: In this paper, the authors investigated the paleobiogeographical global latitudinal and longitudinal diversity patterns in terms of climatic changes during the Early Triassic and found that ammonoids recovered much faster than other marine shelly invertebrates after the end-Permian mass extinction.

TL;DR: The Ucayali peneplain of the Madre de Dios Formation as discussed by the authors is an isochronous, Pan-Amazonian geologic feature that formed following the early to mid-Miocene Quechua I orogenic phase of Andean tectonism.

TL;DR: In this article, brachiopod shells from North America, Spain, Morocco, Siberia, China and Germany were analysed for δ13C, δ18O and 87Sr/86Sr ratios.

TL;DR: In this article, a compilation of data on volumes and masses of evaporite deposits is used as the basis for reconstruction of the salinity of the ocean in the past, and the authors conclude that there have been significant changes in the mean salinity in the ocean following a general decline throughout the Phanerozoic, with the greatest changes related to major extractions of salt into the young ocean basins which developed during the Mesozoic as Pangaea broke apart.

TL;DR: In this paper, present-day relations between small-mammal community structure and rainfall are used to predict late Neogene (12-3-Ma) precipitation patterns in Europe and Anatolia.

TL;DR: In this article, an effective method for reconstructing the climate from Neogene pollen data is proposed, based on the modern climatic requirements of plants to interpret fossil data, which has been conceived especially for periods devoid of modern vegetation analogue.

TL;DR: In this article, carbon isotope excursions in the Rhenohercynian and Saxothuringian zones of the Variscan Mountains, Prague Syncline, Carnic Alps, Montagne Noire, Pyrenees, and Cantabrian Mountains were investigated for δ 13 C carb.

TL;DR: For example, this article showed that organisms that secrete high-Mg calcite in the modern aragonite sea incorporate progressively less Mg in their skeletons with a reduction in the ambient Mg/Ca molar ratio, producing low Mg calcites in “Cretaceous” seawater.

TL;DR: In this article, the authors investigated the sterane composition of 500 Palaeozoic rock samples, representing a broad facies variety from the Upper Ordovician to the P/T-boundary, and analyzed three profiles covering the Hirnantian, the F/F and the Hangenberg-Event for possible shifts in sterane distribution associated with extinction events.

TL;DR: In this article, high-resolution geochemical results from Graphite Peak, Antarctica support an abrupt increase in chemical weathering in the earliest Triassic among otherwise genetically similar paleosols of similar provenance.

TL;DR: In this paper, the spectral gamma-ray (SGR) response of resultant sediments is compared with the influence of organic matter on SGR, showing that elevated thorium may be used as a proxy for humid palaeoweathering.

TL;DR: Wang et al. as mentioned in this paper presented a high-resolution absolute-dated Late Pleistocene and deglacial Asian monsoon record from Dongge Cave, China, showing that monsoon intensity correlates well with atmospheric CH4 concentrations over the transition into the Bolling-Allerod, the Bollings Allerod and the Younger Dryas, providing a detailed account of δ18O variations over most of MIS 5 and the latter portion of MIS 6.

TL;DR: In this paper, three experimental approaches to the study of undertracks using the footprints of an emu (Dromaius novaehollandiae) were described, including vertical sections cut through footprints emplaced in packages of layered, coloured cement, mixed with water to produce different consistencies, firm and semi-fluid.

TL;DR: A detailed investigation of geomorphological evidence of paleoshorelines and exposed stratigraphic sections of lake deposits, combined with a chronology based on radiocarbon dated charcoal and in-situ 14C dating of wave polished bedrock, provide important new constraints on lake level changes of Lake Bosumtwi, Ghana.

TL;DR: In this paper, the early Miocene (23-16 Ma) ATS was determined by applying d 18 O to sea-level calibrations to high-resolution d18 O records from ODP Sites 1090 and 1218.