Experiments on microorganisms capable of surviving silicification are often conducted to gain a better understanding of the process of silica biomineralization and to gain insights into microbially influenced rock formations and biofabrics like those found in ancient deposits such as the Early Archean Apex Chert formation (Schopf, 1993; House et al., 2000). An ideal microorganism for studying s...

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...

Late Cretaceous coastal plain deposits of the Prince Creek Formation (PCF) offer a rare glimpse into an ancient, high-latitude, arctic greenhouse ecosystem for which there is no modern analog. Here, we employ quantitative biofacies analysis to explore spatio-temporal variability in PCF palynomorph and microbiota assemblages from nine paleosol horizons exposed along Colville River, North Slope, ...

Faunal analysis of modern (Benguela upwelling system, Namibia) and ancient (upper Cretaceous, Israel) sedimentary records rich in organic matter, biogenic silica, carbonate, and phosphate indicates that, contrary to stereotypes of upwelling systems as dead zones, macrobenthic communities are present but highly variable. Biofacies vary with distance from the upwelling core and as a function of b...

Abstract. Albian to Turonian carbonate deposits at three different locations of the Lower Saxony Cretaceous and thereby European mid-Cretaceous epeiric shelf sea were investigated for their fossil agglutinated foraminiferal fauna. In this study, 71 samples from two quarries drill cores treated with formic acid, which enabled study assemblages even in highly lithified limestones. total, 114 spec...

At Podsused near Zagreb, in an abandoned surface excavation of cement marls, near Kostanjek (Fig. 1) an 83 m thick lithostratigraphical column was investigated comprising layers of Sarmatian and Pannonian age. Five lithofacies units (A, AB, B, C, D) were separated on the basis of their structural-petrographic characteristics. From layers with greater concentrations of fossils, a rich community ...

microfacies and depositional environments interpretation of asmari and jahrum were studied in boreholes 2, 10 and 11 in gol- khari oil field. based on petrographic criteria, fauna assemblages, biofacies and sedimentary textures, 21 carbonate microfacies and 3 non- carbonate petrofacies were recognized. these microfacies were deposited in distinct depositional environments including tidal flat, ...

Biofacies and lithofacies analysis of one hundred ninety-two (192) ditch cutting rock samples from well x, onshore Niger Delta was carried out for the purpose paleoenvironmental reconstruction succession. The objectives were to identify units species foraminifera use both quantitave qualitative foraminiferal assemblage recognise benthonic biofacies integrate results delineation paleobathymetric...