Cretaceous aeolian deposition is important for understanding variations of the tropical−subtropical atmospheric circulation under greenhouse background. Nevertheless, detailed records revealing response to rising CO2 are still lacking. To shed light on their linkage, we examined Early stratigraphic evolution Hekou Group in Baiyin-Jingyuan Basin, northern China, using multiple methods. The resul...

Early Cretaceous (late Barremian – early Aptian) fissure fill deposits near Balve, North Rhine Westphalia, Germany, have yielded a rich continental vertebrate fauna over the course of last two decades. More than 250 fragmentary specimens, including more 150 osteoderms (i.e., granicones), represent late helochelydrid Helochelydra nopcsai , which had previously been reported from UK, France, and ...

Abstract The breakup of Gondwana resulted in sedimentary deposits recording lacustrine to marine environmental transitions the South Atlantic rift basins during Early Cretaceous. Currently, ambiguity pervades our understanding timing and orientation initial seawater incursion. Here we investigated hydrocarbon biomarkers sediments from two drill cores off West Africa with stratigraphic coverage ...

Palynostratigraphy and palynofacies analyses are applied to identify transgressive-regressive sequences changes in paleoenvironment through the Middle Jurassic–Early Cretaceous succession of Ramså Basin on Andøya. The conglomerate, succeeding lacustrine-swamp deposits Hestberget Kullgrøfta members (Ramså Formation) overlying terrestrial marginal marine lower Bonteigen Member Formation), compris...

Identification of processes driving carbonate diagenesis requires an accurate chronology, particularly along volcanic margins where complex mineral parageneses develop. The Cretaceous “Pre-Salt” carbonates formed in the proto-South Atlantic and are now extensive hydrocarbon reservoirs offshore Brazil Angola. Primary diagenetic textures strongly affect reservoir properties, but timings depositio...

In this paper, we describe an Aptian (Early Cretaceous) larger foraminiferal species Orbitolina (Mesorbitolina) parva from the limestone olistoliths in the lower part of the Yezo Group in the Yubari-Ashibetsu area, central Hokkaido and from limestone pebbles in the lowermost part of the Yezo Group in the Nakagawa area, northern Hokkaido. This is the first report of this species from the circum-...

This paper reports the results of a study magmatic rocks with Sn–W–Au–Ag mineralization from Kuranakh, Elikchan, and Istekh ore fields in Northern batholith belt north-eastern Verkhoyansk–Kolyma orogenic Eastern Russia. Using petrographic, mineralogical, geochemical, isotopic methods, we determined mineral compositions, petrochemistry, geochemistry rocks, P–T conditions their generation crystal...