The Paleogene evolution of the NW margin African Plate (Western External Rif Zone) was studied by means multidisciplinary analyses twenty-one stratigraphic logs, including tectofacies recognition, petro-mineralogical results, and thicknesses analysis. Four intervals were recognized separated three unconformities coarsely aligned with Cretaceous–Paleogene, Eocene–Oligocene Oligocene–Miocene boun...

The Central Iran Basin is a region with unique environmental characteristics in which the Late Paleogene–Early Neogene benthic foraminifera display distinctive distributions and abundances that can assist identifying intervals best reservoir potential. Lipidocyclinid miogypsinid zonal marker taxa this be correlated those SBZ23 (European Basin), indicating an Oligocene (Chattian) age. With sedim...

Abstract Geological studies in the northern sector of Chaco foreland Basin, Bolivia, yielded new fossils coming from late Oligocene-late Miocene Petaca Formation. Few fossil mammals were known Subandean Region Bolivia. We report a partially complete mandible hegetotheriid Hegetotheriinae (Notoungulata, Typotheria) Abapo (Rio Grande River). The specimen (YPFB-LIT-PAL-005) is very close size and ...

The oldest fossils referable to the marsupial order Peramelemorphia (which includes modern bandicoots and bilbies) stratigraphically date from upper Oligocene of Australia. Here we describe new ancient peramelemorphian remains Etadunna, Namba Wipajiri formations, which fill gaps in documented evolutionary history clade spanning some 10 million years. identified taxa include three species Bulung...

In New Caledonia, upper Cretaceous to Palaeogene sedimentary rocks record a regional tectonic shift from extension Eocene compression, which led the obduction of oceanic mantle onto northeastern tip submerged Zealandia continent. This study provides new descriptions these successions in region Gouaro anticline, outcrops and an extensively cored, 1.9 km long onshore petroleum well, CADART-1. Com...

The continental collision between India and Asia has been ongoing since early Eocene time, but the orogenic record is typically dominated by Miocene younger deformation metamorphism that largely overprinted earlier Eocene-Oligocene events. This hinders our understanding of how crustal thickening responds to initial when Himalayan mountains initially rise. advancement spatially precise petrochro...

The origin of silicic rocks in the Michoacán-Guanajuato volcanic field (MGVF) has been understudied since attracted attention researchers. Using geochemical, petrological and structural data from literature, here we propose a model for magmas. We found that all known to date MGVF can be divided 40 % andesite, 33 basaltic 15 basalt, 2 trachybasalt trachyandesite, 10 dacite-rhyolite. systems defo...

Rare calcareous nannofossils from the Cape Roberts Project drillhole CRP-2A indicate that this area was episodically invaded by marginal oceanic surface waters during the late and late early Oligocene. These depauperate assemblages lack most of the biostratigraphic index fossils for the Oligocene, but do provide two datums that aid in constraining the age of the section: the last appearance dat...