The Qom Formation, a series of shales, sandstones and carbonate deposits, is the last transgression of the sea in Central Iran sedimentary basin. Foraminifera are one of the most important and numerous fossil groups present in the Qom Formation. In this study, the micropaleontology of the Qom Formation in three measured stratigraphic sections in south and west of Tafresh (Rakin, Band-e-Ali Nagh...

â â â  abstract â  in this study, 129 samples of the qom formation in kaltakeh, south east mahneshan, were investigated. the thickness of qom formation in the examined section is 565m and comprises of limestone, sandy limestone, marl, shale and argillaceous limestone . at this locality, the qom sediments disconformably overlies the lower red formation and underlies the upper red formation. amon...

The Mariana forearc system, in the northwestern Pacific, is known as only convergent margin setting with currently active serpentine mud volcanism. Fantangisña serpentinite volcano lies 62 km west of trench, within influence North Equatorial Current (NEC). Cores recovered by International Ocean Discovery Program (IODP) Expedition 366 contain pelagic sediments overlying layered deposits. At bott...

Participation of planktonic and benthic bacteria in accumulation of polyphosphates in conditions of nitrates and phosphates overload was investigated in model mesocosms with natural water containing hydrobionts and curtains of Typha angustifolia. Experiments were performed in seasonal dynamics. Dynamic of number of bacterioplankton and benthic bacteria was studied in ecosystems of water and gro...

This study describes seasonal changes in the fluxes of planktonic foraminifera response to environmental conditions during Asian Monsoon. Sediment trap systems were deployed for a period 1 year at two locations Maldives: Kardiva Channel and Inner Sea. Twenty-six (26) recognized, which six species ( Trilobatus sacculifer , Globorotalia menardii Globigerinoides ruber Globigerina siphonifera Neogl...

[1] Fossil foraminifera are critical to paleoceanographic reconstructions including estimates of past episodes of methane venting. These reconstructions rely on benthic foraminifera incorporating and retaining unaltered the ambient isotopic compositions of pore fluids and bottom waters. Comparisons are made here of isotopic compositions of abundant live and fossil foraminifera (Uvigerina peregr...

Abstract. Applications of fossil shells planktonic foraminifera to decipher past environmental change and plankton evolution require a robust operational taxonomy. In this respect, extant provide an opportunity for benchmarking the dominantly morphological species concepts classification group by considering ecological, physiological genetic characters. Although basic framework taxonomy has bee...

in order to study biostratigraphy of the surgah formation in zagros sedimentary basin, two subsurface sections of this formation in maleh kuh and sarkan oil fields at pol-e-dokhtar area, lorestan province, have been selected. the thickness of surgah formation at maleh kuh and sarkan, was 82 and 46 meters respectively and is composed of shale with intercalation of limestone and calcareous shale....