Excellent outcrops of the upper part “Continental Intercalaire” deposits occur in Gara Samani area, southern Algeria. These strata are recognised herein as belonging to Formation, which is composed Vertebrate-rich Sand Member, Sandstone Member and Méguidène Stratified Member. The first two members from a fluvial system last member corresponds an aeolian (dune interdune) system. They have preser...

The mid-Cretaceous (Albian and Cenomanian, 113–93.9 Myr) marked a transformative interval of shark evolution during which lamniforms (mackerel sharks) diversified as dominant marine predators. Yet, their radiation dynamics relative to major biotic turnovers delimiting the Albian–Cenomanian Cenomanian–Turonian boundaries are incompletely understood. Here, we use high-resolution dental fossil rec...

Rare erratic clasts – extraneous rock types occur in the Upper Cretaceous Chalk, including a local basal facies, Cambridge Greensand. The underlying Albian Gault Clay and Hunstanton Red Chalk Formations have also yielded erratics. discovery of these erratics, their description development hypotheses to explain origins significance are reviewed. They became subject scientific interest with inter...

a fauna of 16 species and genera of marine ostracoda is described and illustrated for the first timefrom the mid-cretaceous of the badamouyeh mountain in kerman province. the ostracod assemblagesuggests a favorable condition during the deposition of the strata. the ostracods can also be used for thecorrelation of cenomanian age formations in many places in the middle east

the upper cretaceous thick bedded succession in badamouyeh mountain in honooj area shows the late cenomanian-santonian stages. also, these deposits are well exposed in the south-west of bibihayat and south of cheshmah gaz village. in the studied section, lower and upper honooj green marls (informal) with intercalation of exogyroferous shaly limestone are overlain by thick bedded limestones and ...

We report the first record of a snake from the Cretaceous of northern South America. The remains come from the La Luna Formation (La Aguada Member, Cenomanian of Venezuela) and consist of several vertebrae, which belong to the precloacal region of the vertebral column. Comparisons to extant and extinct snakes show that the remains represent a new taxon, Lunaophis aquaticus gen. et sp nov. An aq...

Collections made by Máximo Ruiz de Gaona and Luis Via Boada between 1940 and 1982, from the Albian-Cenomanian reefal limestones at Monte Orobe (Navarra, northern Spain), now housed at the Museo Geológico del Seminario de Barcelona together with newly recovered material, have enabled the recognition of two new primitive crabs. A new genus, Viaia n. gen. (type: Viaia robusta n. sp.), is compared ...

At Cap Blanc Nez (Channel coast, France), the chalk of Lower Cenomanian is very rich in glauconite. Glauconite authigenic origin and requires mobilization chemical elements for its growth: Si, Fe K. If we already know thanks to elementary geochemistry (Ge/Si ratio) that silica flint present originates from dissolution sponges, it same glauconite? This question only makes sense if glauconite pro...