Abstract The paper describes a complete specimen of passerine bird from the early Oligocene Poland, preserved as imprints bones and feathers on two slabs. Crosnoornis nargizia gen. et sp. nov. is just fifth species described Paleogene worldwide fourth complete. features in distal elements wing exclude Acanthisittidae Oscines indicate that this can be included Suboscines, making it second repres...

The early Cenozoic topography of the northern Tibetan plateau remains enigmatic because paucity independent paleoelevation constraints. Long-held views northward propagating deformation imply a low Paleogene elevation, but this prediction is speculative. We apply flexural modeling to reconstructed isopach data obtained from Qaidam basin, which requires larger topographic load in Qilian Shan and...

Article history: Alkenone-based Cenozoic r Received 30 November 2007 Received in revised form 26 February 2008 Accepted 4 March 2008 Available online 18 March 2008 Editor: R.D. van der Hilst

[1] Stratigraphic data from 63 Deep Sea Drilling Project and Ocean Drilling Program (ODP) sites that sample the lower Neogene and Paleogene sediments of the tropical Pacific have been compiled and put on the biostratigraphic and paleomagnetic timescale refined by ODP Leg 199 scientists. Sediment accumulation rates have been calculated for ten intervals ranging in age from 10 to 56 Ma and have b...

The Chicxulub bolide impact caused the end-Cretaceous mass extinction of plants, but the associated selectivity and ecological effects are poorly known. Using a unique set of North Dakota leaf fossil assemblages spanning 2.2 Myr across the event, we show among angiosperms a reduction of ecological strategies and selection for fast-growth strategies consistent with a hypothesized recovery from a...

The relation between the partial pressure of atmospheric carbon dioxide (pCO2) and Paleogene climate is poorly resolved. We used stable carbon isotopic values of di-unsaturated alkenones extracted from deep sea cores to reconstruct pCO2 from the middle Eocene to the late Oligocene (approximately 45 to 25 million years ago). Our results demonstrate that pCO2 ranged between 1000 to 1500 parts per...