The Oligocene–Miocene deposits of the Asmari Formation are located in SW of the Zagros Mountains of Iran. The lower part of the Asmari Formation consists of an evaporite bed that is termed Basal Anhydrite. Seven sections from four different anticlines were selected and sampled for petrographic and mineralogical analyses .The petrographical examinations were carried out using an optical polarize...

Introduction: Geomorphological observations of Mars surface and mineral detection, in particular hydrated sulphates, militate for the idea that liquid water have existed on Mars surface, even if physical conditions forbid its presence today. Beside the sul-phate formation which requires particular chemical conditions, clay minerals are of particular interest because they are the first by-produc...

for axe head production in Bartonian (Eocene) silicite close to the mining complex of Jablines. They are attributed by associated set tools and archaeological background later part Paris Basin Middle Neolithic (c. 4300–3700 BCE). The main characteristics knapping places bifacial shaping produce preforms. Petrographical analyses show at first examination a relation same beds as those exploited B...