The MER rover Opportunity has carried out the first outcrop-scale investigation of ancient sedimentary rocks on Mars. The rocks, exposed in craters and along fissures in Meridiani Planum, are sandstones formed via the erosion and re-deposition of fine grained siliciclastics and evaporites derived from the chemical weathering of olivine basalts by acidic waters. A stratigraphic section more than...

The São Francisco River has outlined in its course many geological-geomorphological features, and among them it is possible to highlight the paleodune fields, built other periods of Earth's history. These sandy features have, over years, lost their original characteristics attributed not only natural erosive agents, but also anthropogenic since relationship established between society nature be...

This study investigates the palaeoecology of fossil perissodactyls (equids) from late Miocene Maragheh, northwestern Iran. We used dental micro- and mesowear techniques to draw robust inferences about equid paleoenvironment. Mesowear microwear analyses were applied upper molars three species hipparionine horses. For this purpose, we investigated samples fossiliferous localities: Rohanion, Azim,...

This study presents the nannostratigraphy and nannofossil events in the lower boundary of Kalat Formation in the East and West of the Kopeh- Dagh basin. The Kalat Formation comprises of coarse grained detritus limestone with subordinate sandstone intercalations. In the current study, six sections have been chosen in the East and West of the basin which are as follow: Dobaradar section, Kalat se...