Sedimentological, geochemical, and chronological analyses were carried out on 18 carbonate rock samples collected at depths of 938, 1085, 3354 m the western slope Minamitorishima (Marcus Island), which is located near margin Pacific Plate. Four groups rocks distinguished: a mollusk-rich limestone, coral-rich dolomite, foraminiferal-nannofossil packstone, phosphatized mudstone/wackestone. The li...

The rift phase of the Campos Basin developed during Early Cretaceous on a heterogeneous crust comprising structures inherited from Brasiliano-Pan African tectonic events, mostly generated Neoproterozoic-Cambrian amalgamation western Gondwana blocks. main rifting episode took place Hauterivian to Barremian, then was succeeded by transition and post-rift (SAG) phases Aptian. Rift faults as result...

Fossils from the “Jehol Biota” have been studied for nearly 90 years, and the term “Jehol Biota” has been extensively used and is well known today, largely thanks to the discovery of feathered dinosaurs, angiosperms, and numerous other exceptionally preserved fossils in the Lower Cretaceous of northeastern China. Ironically, however, what exactly the Jehol Biota represents and how it is defined...

The clay mineralogy of Lower Cretaceous deep-sea fan sediment in the western North Atlantic is dominated by smectite in most intervals, and by illite in samples from intervals of high sand input. Different intervals of higIt'sand input are enriched in kaolinite. Kaolinite and illite levels do not correlate in this sediment, indicating that the input of each clay type was independent and represe...

Whereas titanosaurians represent the most diverse and cosmopolitan clade of Cretaceous sauropod dinosaurs, they remain rare components of Cretaceous African faunas. Currently recognized continental African titanosaurians include Aegyptosaurus baharijensis and Paralititan stromeri from early Upper Cretaceous deposits near Bahariya Oasis, Egypt, and Malawisaurus dixeyi and Karongasaurus gittelman...

Premise Seed cones of extant Pinaceae exhibit two mechanisms seed release. In “flexers” the cone scales remain attached to central axis, while flexing and separating from each other release seeds. “shedders” are shed with seeds either remaining scale or becoming detached. The early fossil history Jurassic Early Cretaceous is dominated by cones, systematic information provided shedding has been ...

ABSTRACT Submarine slopes prograde via accretion of sediment to clinoform foresets and degrade in response channel or canyon incision mass-wasting processes. The timescales over which progradation degradation occur, the large-scale stratigraphic record these processes, remain unclear due poor age constraints subsurface-based studies areally limited exposures exhumed systems. We here integrate 3...