Carbon and strontium isotope stratigraphy of the Upper Cretaceous (Cenomanian-Campanian) shallow-water carbonates of southern Italy: Chronostratigraphic calibration of larger foraminifera biostratigraphy

Nummulitids, lepidocyclinids and Sr-isotope data from the Oligocene of Kutch (western India) with chronostratigraphic and paleobiogeographic evaluations

“…Rare radiate Nummulites (previously determined as Operculina complanata) have not been morphometrically analyzed since their assignment to N. kecskemetii appears to be doubtless. Moreover, this for dazkırı see Özcan et al, 2009a; for Kelereşdere see Özcan et al, 2010a For this work, several shells of bivalves (mainly pectinids and ostreids) were collected from the field and prepared in the laboratory, following the method described in Boix et al (2011) andMutti (2015). The best preserved shells, based on visual inspection and optical petrography, were further screened for elemental composition of Mg, Sr, Mn and Fe, in Sr ratios of the samples were adjusted to a value of 0.709175 for the USGS EN-1 standard, to be consistent with the normalisation used in the compilation of the 'look-up' table of McArthur et al (2001;version 5).…”

Constraining the age of the last marine sediments in the late Cretaceous of central south Pyrenees (NE Spain): Insights from larger benthic foraminifera and strontium isotope stratigraphy

“…We analysed the low-Mg biotic calcite of fossil shells of rudists, a few ostreids and some unidentified bivalve fragments. Samples selected in the field were passed through an accurate screening, following the procedure described in detail in previous works (Frijia and Parente, 2008b;Boix et al, 2011;Frijia et al, 2015). This procedure integrates petrographic observations (standard optical and cathodoluminescence microscopy, SEM) and geochemical analyses (minor and trace element concentrations) to assess the degree of diagenetic alteration, following the guidelines of McArthur (1994).…”

Selected agglutinated larger foraminifera from the Font de les Bagasses unit (early Campanian, southern Pyrenees)

“…In the Pyrenees, the species is known from Coniacian to Lower Campanian. However, it is also mentioned from the Turonian (FRIJIA & PARENTE, 2008;CHIO-CCHINI et al, 2012;FRIJIA et al, 2007; among others).…”

“…sphaeroidea also occur in the Coniacian deposits of the Pyrenees (CAUS et al, 2013). The specimens designed as P. sphaeroidea in the Turonian of the Tethyan deposits are smaller than the Pyrenean ones (see for instance, FRIJIA & PARENTE, 2008;CHIOCCHINI et al, 2012;FRIJIA et al, 2007;ARRIAGA et al, in press). …”

“…Geographic distribution: P. sphaeroidea type is reported from the Pyrenean basin, while the small forms have a wider occurrence (see for instance: SCHLAGINTWEIT, 1992;FRIJIA et al, 2007).…”