Showing papers in "Palaeogeography, Palaeoclimatology, Palaeoecology in 1991"

TL;DR: In this article, the evolution from the first transtensional phase of extension to the passive margin stage is analyzed and four main rifting events are recognized in the Tethyan realm.

TL;DR: In 1985, a Sino-Swiss limnogeological expedition to China's largest inland lake recovered seismic profiles and piston cores to help calibrate palaeoclimatic models of monsoon and insolation fluctuations over the northern Tibet-Qinghai Plateau since the Last Glacial Maximum as discussed by the authors.

TL;DR: In this article, the Pindos ocean, the Antalya ocean, and the Cyprus ocean were investigated and it was shown that, despite some important differences in the timing of events, individual oceanic basins went through essentially predictable stages, including rifting, spreading, subduction/accretion, displacement/emplacement and collision.

TL;DR: In this article, a series of kinematically restored sedimentary/tectonic reconstructions, covering an area from the southern North Sea to the USSR Barents Sea, is described.

TL;DR: The evolution of planktonic foraminiferal faunas dominated by warm-water taxa, even though oxygen isotopes only recorded relatively minor cooling, can be reconciled by the explanation that the biotic communities responded to changes in trophic resources and euphotic habitats that accompanied the temperature reduction as discussed by the authors.

TL;DR: Pollen analyses of Late Quaternary sediments from nine marine piston-cores reveal a continuous vegetation and environmental record for eastern Indonesia and northern Australia as mentioned in this paper, and show that glacial periods are characterized by high pollen concentrations in marine sediments, recording expanding grassland vegetation.

TL;DR: A taxonomically oriented, ichnologic evaluation of modern deep-sea environments has been conducted in this paper, where the authors found that the penetration depth of trace fossils is influenced by oxygenation, benthic food availability and substrate consistency.

TL;DR: In this paper, the evolution of the Meliata-Hallstatt ocean and of its southern and northern margin in the Inner Western Carpathians are described and the main rifting began during the Pelsonian and the sea-floor spreading ended at the beginning of the Middle Carnian contemporaneously with the Raibl event.

TL;DR: In this article, five plate tectonic reconstructions are presented illustrating the breakup of Pangea and the evolution of the world's ocean basins during the Early Jurassic (Pliensbachian), Late Jurassic (Volgian), Early Cretaceous (Aptian), late Cenomanian, and latest Cetaceous (Maestrichtian).

TL;DR: Kaiho et al. as discussed by the authors found that calcareous benthic foraminiferal test morphology can be used to extrapolate relative amounts of dissolved oxygen in Paleogene deep-sea bottom water.

TL;DR: Clay mineralogical changes across the Jurassic-Cretaceous boundary from the northern to the southern part of western Europe show similar patterns in: the mudrocks exposed on the Yorkshire Coast, the paralic sediments of the Dorset Wessex Basin, and the Jura and Vocontian Trough of S.E. France.

TL;DR: In this paper, the molar distribution coefficients for C. rawsoni were determined from laboratory experiments in which C.rawsoni are cultured under controlled temperatures and salinities.

TL;DR: In this paper, the affinities of the ammonoid faunas from central-west and southern South America are used to analyze the evolution of seaways and oceanic connections with Tethys during the Jurassic and Cretaceous.

TL;DR: In this article, a detailed analysis of the Prungle lakes is presented, showing that they are a site of cyclic Quaternary sedimentation in response to the well documented global climatic fluctuations associated with the glacial interglacial cycle.

TL;DR: In this article, the δ34S values of a variety of gypsum types from the moderm playa lakes of southern Australia show little relationship with underlying bedrock types or the values of the bedrock sulphur.

TL;DR: A series of ocean General Circulation Model (GCM) experiments for Paleocene, Eocene, Miocene and present-day continental geography with atmospheric forcing prescribed from atmospheric GCM experiments is utilized to investigate the changes in surface and deep-water ocean circulation through the Cenozoic as discussed by the authors.

TL;DR: In this article, the authors used stratigraphy, radiocarbon and pollen analysis from Lake Frome, South Australia, close to the summer/winter rainfall boundary at 30° south latitude.

TL;DR: In the early, middle and late Permian deposits pertaining to the Sicanian paleogeographic domain of western Sicily, near the western end of the Eurasiatic Tethys, radiolarians, paleopsychrospheric ostracods and conodonts were found as discussed by the authors.

TL;DR: The sedimentological, chemical and isotopic characteristics of sediment cores from three slightly saline to hypersaline lakes (Highway, Ace and Organic Lakes) and two marine inlets (Ellis Fjord and Taynaya Bay) in the Vestfold Hills, Antarctica, have been examined.

TL;DR: In this paper, the spatial dependence of the relative sea level on the geometry of the coastline around the site where sea-level is evaluated is investigated. And the results show that the observations at several sites in Japan are consistent with the predicted sea level variations.

TL;DR: The early Mesozoic Newark Supergroup as mentioned in this paper consists of continental sedimentary rocks and basalt flows that occupy a NE-trending belt of elongate basins exposed in eastern North America.

TL;DR: The results of this survey indicate that bone crushing was not employed by predatory dinosaurs during their utilization of prey carcasses, and was only developed later by mammalian predators in the Cenozoic.

TL;DR: Careless Creek Quarry is a newly discovered, rich vertebrate locality in the Judith River Formation of south-central Montana as mentioned in this paper, which has yielded approximately 1500 specimens of various vertebrate taxa, most notable are dinosaurs.

TL;DR: In this article, the authors reviewed the coprolites (fossil excrements) of terrestrial vertebrates, giving particular attention to examples that may have originated from dinosaurs.

TL;DR: A suite of piston cores recovered from Lake Malawi (9−14°S, 34−35°E), east Africa in 1986 has been analyzed for major and minor elements, organic C and N, calcium carbonate and diatoms as discussed by the authors.

TL;DR: In this article, a series of palaeogeographic maps are presented showing interpreted palaeopositions of the various Southeast Asian terranes in the Late Palaeozoic and Mesozoic which are consistent with current geological and geophysical constraints.

TL;DR: PalHYDAF as mentioned in this paper reconstructs the Late Quaternary environmental and hydrological changes of northwest Africa, and to interpret them in terms of palaeoclimate for testing coupled atmospheric/ocean circulation models.

TL;DR: In this article, a tentative palaeoenvironmental curve is derived from organic matter, showing oscillations between more proximal (i.e. shallower water) and more distal (e.g. deeper water) conditions.

TL;DR: In the Holy Cross Mts. in Poland, a number of dinosaur tracks were discovered during the last four years as discussed by the authors, including Anomoepus pienkovskii and Moyenisauropus karaszevskii.

TL;DR: Benson et al. as discussed by the authors used the types of fish living in Walker Lake prior to 1940 to demonstrate that shallow-lake intervals resulted from diversion of the Walker River and not from climatic aridity.