The best-documented example of rapid climate change that characterized the so-called 'greenhouse world' took place at the time of the Palaeocene-Eocene boundary: introduction of isotopically light carbon into the ocean-atmosphere system, accompanied by global warming of 5-8 degrees C across a range of latitudes, took place over a few thousand years. Dissociation, release and oxidation of gas hy...

Toxoceratoides (Ancyloceratina, Helicancylidae) is a lower Aptian (Lower Cretaceous) small heteromorph ammonoid mainly known by samples of fragmentary specimens. In the present work, we study sample 145 specimens this genus from Deshayesites forbesi, deshayesi and Dufrenoyia furcata zones (lower Aptian) vicinity village Les Ferres (southeastern France). The taxa recognized (in stratigraphic ord...

Abstract. Extensive black shale deposits formed in the Early Cretaceous South Atlantic, supporting notion that this emerging ocean basin was a globally important site of organic carbon burial. The magnitude burial marine basins is known to be controlled by various tectonic, oceanographic, hydrological, and climatic processes acting on different temporal spatial scales, nature relative importanc...

Palynostratigraphic and palynofacies analysis have been performed on hydrocarbon seep carbonate, carbonate nodule mudstone samples from the Early Cretaceous Kuhnpasset Beds in area of Wollaston Forland, Northeast Greenland. Three informal palynostratigraphic zones defined based dinoflagellate cyst occurrences. The range ?early Barremian to early Aptian age, correlate with previously These indic...

Internal moulds of rudist bivalves from the basal Exu Formation western Araripe Basin, northeastern Brazil, are identified as Early Cretaceous (Barremian to Aptian) radiolitidin caprinuloideid genus cf. Amphitriscoelus Harris and Hodson. The rudists occur part a sparse assemblage remané fossils in Formation, fluvial sandstone resting disconformably on Santana Group likely have been derived shal...

New species of Leptotarsus (Tipulidae s.str.) are described from the Early Cretaceous beds of Brazil (Santana Fm. Aptian/Albian, ca. 112 Mya) and Spain (La Huérguina Fm., Late Barremian, ca. 126 Mya), vis. L. grimaldii sp. nov., L. cretaceus sp. nov., L. martinsnetoi sp. nov., L. buscalioniae sp. nov., L. ibericus sp. nov. and L. contractus sp. nov. Males of three species possess extremely long...

It is suggested that the source materials of the English Aptian fuller's earths were soils of the Anglo-Belgian Land and that montmorillonite is the characteristic clay mineral of marine deposits formed when old land surfaces of low relief are transgressed. When the origin of English fuller's earths was discussed in the 1930's, Grim (1933, 1935) and Newton (1934) engaged in a polemic. Grim main...