Showing papers in "Palaeogeography, Palaeoclimatology, Palaeoecology in 1999"

TL;DR: The history of Lake Pannon can be divided into three distinct intervals: an initial stage with low water level, which resulted in isolation from the sea at about 12 Ma and might have led to temporary fragmentation of the lake; an interval of gradual transgression lasting until ca. 9.5 Ma; and a long late interval of shrinkage and infilling of sediments that persisted into the Early Pliocene as mentioned in this paper.

TL;DR: In this article, paired carbonate and organic-carbon isotope analyses from Nevada, USA, together with a consideration of the effects of mountain-building and ice-sheet coverage of the continents on atmospheric pCO2, lead to a new hypothesis for the cause of the Late Ordovician glaciation.

TL;DR: A 305m-thick loess-red clay sequence was discovered recently at Lingtai, which is located in the middle part of the Chinese Loess Plateau as discussed by the authors.

TL;DR: Palynological studies of a peat-bog sequence, with a basal date of 10,990 80 yr B.P., provide a history of vegetational and climatic changes in the Icatu River Valley located inside a large system of stabilized sand dunes at the middle Sao Francisco River at 10o24 0 S, 43o13 0 W in northeastern Brazil as mentioned in this paper.

TL;DR: The early Toarcian (eTo) and Cenomanian-Turonian (C-T) mass extinctions are comparable from a wide range of scales and perspectives as mentioned in this paper.

TL;DR: In this paper, the authors measured the seasonality of valve calcification in two lakes (Ammersee and Starnberger See, southern Germany) during a year, at different water depths.

TL;DR: The Cenomanian-Turonian boundary (CTB) section at Eastbourne, Sussex, England is the thickest at outcrop in the Anglo-Paris Basin, is rich in macro-, micro- and nanno-fossils, and shows less diagenetic alteration than other sections in NW Europe.

TL;DR: In this paper, the late Lujanian and Platan local ages (latest Pleistocene to Holocene) of the Pampas region were used for the analysis of land mammal assemblages, pollen records and geology.

TL;DR: In this article, Holocene and Pleistocene sediments from an arid tropical region in Ethiopia have been analyzed for their phytolith content, presented as detailed counts and diagrams according to the Twiss classification.

TL;DR: The lower and middle Griesbachian are characterised by laminated sediments containing low diversity bedding plane assemblages as mentioned in this paper, and there is a moderate increase in tiering above and below the surface.

TL;DR: This paper presents the results of a preliminary study, in which lion-killed carcasses are analyzed with respect to the availability and disposal of flesh and conspicuous carnivore-inflicted bone damage patterns, so as to have a reference that can be applied both to archaeofaunas and to actualistic experiments that try to model early human behavior.

TL;DR: The position of the central axis of deposition over Colombian and Venezuelan continental crust has varied markedly through time as discussed by the authors, with a tectonic origin and it occurred in combination with tectonically driven changes in accommodation space.

TL;DR: The Hangenberg Bio-event represents one of the largest Phanerozoic mass extinction events as discussed by the authors and is not only recorded by changes in faunal composition affecting all trophic levels (in the terrestrial and marine environments), but is also recognized by lithological and geochemical changes just prior to the Devonian-Carboniferous (D-C) boundary.

TL;DR: A 1 m thick carbonate crust, layered and commonly domal, caps crinoidal limestones on reef complexes of the top Permian Changxing Formation in the Huaying Mountains, eastern Sichuan, China as discussed by the authors.

TL;DR: The distribution and ecology of living (stained) shallow water (0-6 m) foraminifera along the Skagerrak-Kattegat coast, eastern North Sea is investigated in this paper.

TL;DR: In this article, a comparison of the living and dead assemblages of benthic foraminifera from the coastal areas of the Skagerrak-Kattegat reveals that although there are considerable similarities in terms of the presence and absence of species, there are major differences in relative abundance at species level.

TL;DR: In this paper, the early Oligocene (33.5 Ma) is marked by a major step in the long-term transition from an ice-free to glaciated world.

TL;DR: In this paper, a new pollen-derived method of climatic quantification, based on the mutual climatic range of plant taxa, has been applied to 17 Pliocene pollen sequences in the West Mediterranean area.

TL;DR: In this paper, an age model of the Luochuan loess-paleosol sequence was developed by tuning the magnetic susceptibility record to time-series of insolation changes.

TL;DR: In this paper, a model of basin formation and sediment accumulation for the Ziway-Shala lake basin system is presented to separate the effects of climatic change from environmental variations induced by local or regional factors such as volcano-tectonic forcings.

TL;DR: In this paper, a core transect centred in the oxygen minimum zone (OMZ) impinging at the continental slope off Pakistan indicate stable oxygen minimum conditions for the past 7000 calendar years.

TL;DR: In this article, a complete Cenozoic pollen sequence of the Qaidam Basin has been constructed with absolute age control, and its implications for the uplift of the Tibetan Plateau and the drying of central Asia during the CENozoic Era is discussed, based on the interpretation of the pollen sequence, the commencement of eolian deposition in central China and the change of climatic distribution pattern of China.

TL;DR: A review of studies on recent plants reveals that environmental factors that increase transpiration of plants or decrease water availability also tend to increase the leaf venation density.

TL;DR: Foraminiferal assemblages were collected at 2-weekly intervals over a period of 12-months from the intertidal zone of Cowpen Marsh as discussed by the authors, and cluster analysis was performed to identify the vertical relationship of the local environment in which the assemblage accumulated to a reference tide level.

TL;DR: In this paper, the C/N ratios of organic matter sources in coastal lagoons and their drainage areas in the southern Baltic Sea region are investigated to determine the origin of organic material (i.e. terrigenous or marine) in the sediments of the Lagoons.

TL;DR: This paper describes a series of in vitro experiments during which juveniles of the euryhaline ostracod Cyprideis australiensis were grown to adulthood in waters of ranging salinities and Mg=Ca and Sr=Ca ratios, and under two different constant temperature regimes, 20o and 25oC.

TL;DR: Charcoal, elemental carbon and clastic particle analyses have been undertaken on tropical marine core G6-4 collected from the eastern Indian Ocean between the Lesser Sunda Islands of Indonesia and northwestern Australia to help interpret an existing pollen record as mentioned in this paper.

TL;DR: In this article, a comparison of live and dead benthic foraminiferal faunas in a five-station sample transect off Cape Blanc suggests that interspecific differences in living/dead (L/D) ratios are to a large extent determined by seasonal differences in reproduction.

TL;DR: Palaeogeographic maps using plate tectonic reconstructions as a base, illustrate the evolution of Borneo and Sulawesi and highlight important changes in the environment during the Cenozoic as mentioned in this paper.

TL;DR: In this paper, Radiolarians are found in a sequence of cherty limestones interbedded with platform-derived carbonates in the Middle-Upper Jurassic Terminilletto section of the Umbria-Marche-Sabina Apennines (central Italy).