De tiempo atrás se conoce que los fosfatos económicamente explotables en Colombia encuentran sucesiones sedimentarias marinas del Cretácico Superior (Cathcart y Zambrano, 1967; Mojica, 1987; Zambrano 1990). En el occidente de la subcuenca Neiva Valle Magdalena (VSM), estos niveles están restringidos al intervalo Santoniano-Maastrichtiano, representado las formaciones Lidita Inferior, Yaguará. L...

Abstract Structural lineaments of Southeast Nigeria were delineated using high-resolution aeromagnetic data. Advanced methods such as enhanced horizontal gradient amplitude (EHGA) involving a 3D model and tilt depth method (TDM) used in this study. The simulated magnetic the EHGA detector positioned peaks over source borders created sharp clear edges for sources. TDM is cutting-edge determinati...

coccolithophores are important primary producers in the modern world ocean and were almost certainly important in the mesozoic oceans, prior to the evolution and rise of diatoms in the phytoplankton. calcareous nannofossils are abundant, planktonic, rapidly evolving and largely cosmopolitan, so they are a good tool for biostratigraphy and paleoecology studies especially in the cretaceous system...

An adult male Hersiliidae spider is described from amber that originates the Upper Cretaceous (Santonian) Ajka Coal Formation (Ajka-Csingervölgy, Hungary), so-called ajkaite. The has elongate posterior spinnerets and a short third pair of legs III, both characteristics family, but differs all known Mesozoic (discovered in burmite) fossil Recent European representatives so new genus species name...