Mediterranean Neocomian belemnites, part 3: Valanginian-Hauterivian belemnites

Abstract

Abstract:The classical papers of RASPAIL (1829RASPAIL ( , 1830 and DUVAL-JOUVE (1841) described a wide range of belemnite species, mainly from the Lower Cretaceous of the Castellane-Peyroules area (Alpes de Haute-Provence, France). The present work focuses mainly on the biostratigraphy of these previously described belemnite taxa for their stratigraphic relationships had not been determined precisely. Here, biostratigraphy is related to the lithologic successions and faunal associations (ammonites) of various outcrops in the area studied. Complementary data were obtained from the La Lagne, Les Allaves and Pas d'Escale sections (Alpes de Haute-Provence, France). And, in order to attain a better understanding of the stratigraphic distribution of Late Valanginian belemnites in condensed glauconitic deposits, these assemblages are compared with belemnites from deeper water successions in the Angles, Source de l'Asse de Moriez, Cheiron areas and those in the vicinity of La Charce and Vergol that are even deeper.

A High‐Resolution Belemnite Geochemical Analysis of Early Cretaceous (Valanginian‐Hauterivian) Environmental and Climatic Perturbations

“…The Cretaceous successions, located near Caravaca de la Cruz (Murcia Province; Figure 1a), consist of nodular limestones with abundant crinoid fragments, overlain by hemipelagic marl-limestone alternations (Aguado et al, 2000;Company & Tavera, 1982). Limestone bed thickness varies from one to several decimeters, while interbed thickness can occasionally reach 1 m. The succession is thought to have been deposited in a low-energy marine basinal setting, with an estimated water depth of a few hundreds of meters (Hoedemaeker & Leereveld, 1995;Janssen, 2003). For the Berriasian part of the section, the marl-limestone alternations have been attributed to orbital forcing (Sprenger & Ten Kate, 1993).…”

The d'Orbigny Palaeontological Collection of the National Museum of Natural History and Science, Lisbon, Portugal: Historical perspective and revision of Cretaceous Cephalopoda

“…Some other morphologically close forms of the genus are T. scheuchzerianus Bosc, 1801, with coarse entire ribs at the later growth stages and lack of tubercles, and T. acutus Passy, 1832, with more depressed and less ornamented whorls. (1973), Janssen (1997) and Fischer & Gauthier (2006), some of the specimens assigned by d'Orbigny 1840 Avram & Grädinaru (1993), Janssen (1997, 2009, Janssen & Fözy 2004, Fischer & Gauthier (2006) and Janssen et al 2012 Barroso-Barcenilla F. et al…”

“…shows a circular posterior crosssection without groove. In the last years, the upper Valanginianlower Barremian spe cies H. subfusiformis, type of the genus, has been studied by some authors, such as Janssen & Fözy (2004), Fischer & Gauthier (2006), Janssen (2009 and Janssen et al (2012).…”

The first definite record of a Valanginian ichthyosaur and its implications on the evolution of post-Liassic Ichthyosauria

“…This association is typical for the lower Valanginian (Busnardoites campylotoxus Zone; Janssen and Clément, 2002). The occurrence of Duvalia emericii (Raspail, 1829), present along the upper section of the path to the hill, with the absence of the aforementioned species characterizes the base of the upper Valanginian (Saynoceras verrucosum Zone; Janssen and Clément, 2002 (Janssen and Clément, 2002;Janssen, 2009…”