Calcareous Nannoplankton Fossils and their Stratigraphic Meaning

Comment on "Calcareous nannoplankton response to surface-water acidification around Oceanic Anoxic Event 1a".

Erba et al. (Reports, 23 July 2010, p. 428) attributed calcareous nannofossil morphology and assemblage changes across Cretaceous Oceanic Anoxic Event 1a to the effects of surface ocean acidification. We argue that the quality of carbonate preservation in these sequences, the unsupported assumptions of the biotic response to acidity, and the absence of independent proxy estimates for ocean pH o...

Calcareous Nannoplankton Response to Late Albian Oceanic Anoxic Event 1d in the western North Atlantic

14. Oligocene to Recent Calcareous Nannoplankton from the Philippine Sea, Deep Sea Drilling Project Leg 59

During Leg 59 of the Deep Sea Drilling Project, five sites (447 to 451) were occupied and seven holes drilled between Okinawa and Guam in the Philippine Sea (Fig. 1). All holes except Hole 447 yielded common calcareous nannoplankton at certain intervals cored. Nannoplankton assemblages and their age assignments will be discussed for each site, and fossil lists for selected samples from Holes 44...

Autofunctors and Their Meaning

Kato and Struppa (1999) proposed the notion of autofunctor. In the present paper, the meanings of this notion are analysed in the light of a proposed structural-phenomenological interpretation of the theory of categories (Draganescu 2000). The autofunctor may become important for phenomenological categories. It represents an informational and physical process, not only a mathematical notion. It...

Australia's Oldest Marsupial Fossils and their Biogeographical Implications

BACKGROUND We describe new cranial and post-cranial marsupial fossils from the early Eocene Tingamarra Local Fauna in Australia and refer them to Djarthia murgonensis, which was previously known only from fragmentary dental remains. METHODOLOGY/PRINCIPAL FINDINGS The new material indicates that Djarthia is a member of Australidelphia, a pan-Gondwanan clade comprising all extant Australian mar...