the chadegan metamorphic complex is a wnw-ese- trending antiformal structure located in sanandaj-sirjan structural zone, iran.the inner core of the structure is made of orthogneiss, containing eclogitic lenses. schists and marbles lie structurally above theorthogneiss and crop out in the external limbs of the antiformal dome. two main deformational episodes have been documented in theschists an...

This study reconsiders the previous biostratigraphic settings for Asmari Formation in eastern Zagros Basin (Fars Basin). The results imply that Rupelian is identified by total range zone of Nummulites species (N. vascus, N. fichteli, intermedius). occurrence Archaias kirkukensis, A. hensoni, and asmaricus before disappearance current even co-occurrence hensoni with mentioned prevents use recent...

Numerous important Miocene and early Pliocene epithermal Au-Ag deposits are present in the northern Great Basin. Most deposits are spatially and temporally related to two magmatic assemblages: bimodal basaltrhyolite and western andesite. These magmatic assemblages are petrogenetic suites that reflect variations in tectonic environment of magma generation. The bimodal assemblage is a K-rich thol...

Abstract The position of the Banwell Bone Cave mammal assemblage zone (MAZ) in mammalian biostratigraphy British Isles has been focus debate for decades. Dominated by fauna typical cold environments it was originally linked to marine oxygen isotope stage (MIS) 4 stadial (ca. 72–59 ka). Subsequently argued that MAZ more likely relates temperate interstadial MIS 5a 86–72 It is envisioned “cold fa...

biofacies and palaeoecology of the limestone of the jahrum formation in the lar area in the southwest of iran (zagros basin) is addressed in this paper. our detailed analysis of biofacies and palaeoecology shows that the jahrum formation in the studied area were deposited in a carbonate open shelf dominated by heterozoan and, subordinately, photozoan skeletal assemblages. based on analysis of l...