The Changhsingian (Late Permian) Hambast Formation of sections at Baghuk Mountain (Central Iran) has yielded diverse ammonoid assemblages composed the genera Pseudogastrioceras, Shevyrevites, Arasella, Dzhulfites, Paratirolites, Clivotirolites gen. nov., Esfahanites Alibashites, Lutites Abichites and Stoyanowites. succession species allows for a subdivision rock unit into biozones, which largel...

Abstract Ornamental adornment of the Kharraqan tomb towers, most outstanding funeral monuments Seljuk era in NW Iran, and those four best-preserved Seljuq brick minarets northern documents artistic canon pre-glaze stage Iranian Islamic architecture. Despite some later interruptions, these their plain-brick ornaments, as well ‘virtually interlaced’ stand at beginnings a rich development that led...

The vein-type Chomalu polymetallic epithermal deposit, located in the Tarom-Hashtjin Metallogenic Province (THMP), western Alborz, formed two separate mineralized zones controlled by fault within andesite and olivine basalt host rocks. deposit occurs adjacent to Varmarziar quartz monzonite, monzodiorite, monzosyenite intrusions. Ore mineralization consists of three stages; (i) an early stage do...

early triassic carbonate ramp sediments of the lower part of the elika formation are known as vermicular limestone. in the moro mountain, northwest iran, the vermicular limestone includes bioturbated dolomitic mudstone, bioclastic packstone and grainstone, algal calcirudite and intraclastic grainstone. these sediments accumulated in their lower part in open marine subtidal and shoal environment...

chronology of northwestern iran is principally based on archeological excavations of the area located around urmia lake. although plain and filled with water, and the outcomes of these excavations are extended to the whole northwestern region. however, northwestern iran despite having geographical diversities with mountainous plains and low stretches, systematic and comprehensive studies have b...

the protoliths of metamorphosed argillaceous rocks from the garmichay area in the east azerbaijan province of nw iran were clay-rich sediments of reworked nature, originating most likely from an andesite to andesite-basalt source and deposited in an active continental margin tectonic setting. the protoliths of the garmichay metapelites experienced low to moderate chemical weathering. andalusite...