Located in northern Peru, at the lowest segment of Central Andes, Bagua Basin contains a Campanian to Pleistocene sedimentary record that archives local paleoenvironmental and tectonic history. We present new ?18O ?13C signatures pedogenic carbonate nodules from paleosols Campanian–Maastrichtian Fundo El Triunfo Formation upper Eocene–middle Miocene Sambimera reconstruct isotopic composition pa...

Most studies of the response terrestrial vegetation to climate change during Paleocene-Eocene Thermal Maximum (PETM) have focused on individual sites and sections. To get a broader perspective we compiled published records pollen spores across transition at 38 around globe. For 10 with quantitative data PETM palynofloras were largely distinct in composition from those latest Paleocene or post-P...

The magnetostratigraphy of Sites 748 and 750 of Ocean Drilling Program Leg 120 is reported. About 260 sediment cubes were stepwise demagnetized with alternating fields to determine their characteristic direction of natural remanent magnetization. In general, the characteristic inclinations of the single samples have values similar to the inclination values obtained from whole-core measurements ...

The Fayum Depression of Egypt has yielded fossils of hystricognathous rodents from multiple Eocene and Oligocene horizons that range in age from ∼37 to ∼30 Ma and document several phases in the early evolution of crown Hystricognathi and one of its major subclades, Phiomorpha. Here we describe two new genera and species of basal phiomorphs, Birkamys korai and Mubhammys vadumensis, based on rost...

Changes in sedimentary profiles and stratigraphic architecture over time lake basins are shown to be relevant markers of climate changes terrestrial palaeoenvironments. The the Priabonian (late Eocene)–early Rupelian (early Oligocene) Alès–Saint-Chaptes–Issirac saline system has been reconstructed from sedimentological, biostratigraphic magnetostratigraphic analysis outcrops well cores. As a fu...

The classic Neotethyan Ankara Melange formed within the Triassic-Eocene İzmir-Ankara-Erzincan ocean (‘N Neotethys’), bordered in central Anatolia by Kırşehir and Tauride-Anatolide continental units to south discontinuous Sakarya continent northwest. Farther north, separate Intra-Pontide probably remained partly open until early Cenozoic. developed via phases of intra-oceanic accretion (mainly p...

A molecular phylogenetic analysis recovers a pattern consistent with a drift vicariance scenario for the origin of Greater Antillean cichlids. This phylogeny, based on mitochondrial and nuclear genes, reveals that clades on different geographic regions diverged concurrently with the geological separation of these areas. Middle America was initially colonized by South American cichlids in the Cr...