A Revised Tropical to Subtropical Paleogene Planktonic Foraminiferal Zonation

Abstract

New biostratigraphic investigations on deep sea cores and outcrop sections have revealed several shortcomings in currently used tropical to subtropical Eocene planktonic foraminiferal zonal schemes in the form of: 1) modified taxonomic concepts, 2) modifiel:l/different ranges of taxa, and 3) improved calibrations with magnetostratigraphy. This new information provides us with an

Oligocene-Early Miocene Planktonic Microbiostratigraphy and Paleoenvironments of the South Slovakian Basin (Lučenec Depression)

“…Planktonic foraminiferal biostratigraphy was applied on the basis of the Oligocene-Early Miocene zonal schemes (Berggren & Miller 1988;Spezzaferri 1994;Berggren et al 1995) and Paratethyan foraminiferal data (Sztrákos 1979;Rögl 1985;Cicha et al 1998;etc.). Bioevents of nannoplankton and foraminiferal biostratigraphy were denoted by the acronyms sensu Berggren & Pearson (2005), "LO" for the lowest occurrence and "HO" for the highest occurrence of the index species. determinable, G (good) -the species are very easily identifiable, etching and overgrowth is slight.…”

“…Those foraminifers are associated with Paragloborotalia opima, P. bella, Globigerina praebulloides and Globigeri- Similarly, the presence of this species in the Lučenec Formation was also noted by Holcová (2001Holcová ( , 2005. The extinction of P. opima provided an important datum for the early Chattian biozone (O5 Zone sensu Berggren & Pearson 2005). At the same horizon, the LO of Globigerinoides primordius was recorded.…”

“…Planktonic associations are diversified to include the following species: Turborotalia ampliapertura, Paragloborotalia nana, Subbotina gortanii, Globigerina praebulloides, Globigerina officinalis and Globigerina leroi. These foraminiferal species enable us to determine the Middle Rupelian age (O2 Zone sensu Berggren & Pearson 2005). Planktonic bioproductivity increased probably simultaneously with the sea-level rise during the Kiscellian transgression.…”

Enhanced primary productivity and magnetotactic bacterial production in response to middle Eocene warming in the Neo-Tethys Ocean

“…The residues were studied with a binocular stereomicroscope to characterize assemblages and to identify biostratigraphic marker species. A representative split of at least 300 specimens was picked from the N 63 μm fraction, mounted on micro-slides for permanent record and identification purposes, and classified following the taxonomic criteria of Berggren and Pearson (2005). The planktonic foraminiferal zonations of Berggren et al (1995) and Wade et al (2011) were followed.…”

New fossils of Sirenia from the Middle Eocene of Navarre (Western Pyrenees): the oldest West European sea cow record

“…Ph.D. thesis, Univ. País Vasco, Bilbao, 1997), whose planktonic foraminiferal content (middle Lutetian-early Bartonian E10 and E11 zones of Berggren & Pearson, 2005) attests to hemipelagic deposition.…”