A rich record of specimens with slightly sclerotised skeletal parts or even soft−bodied fossils have been established from several well−known lower and middle Cambrian Lagerstätte, e.g., Bur− gess Shale of the Stephen Formation, Kinzers, Marjum, and Wheeler formations in North America; Buen Formation in North Greenland; Doushantuo, Chengjiang, and Kaili in China; Emu Bay Shale in Australia and ...

Deep-water massive (featureless) sands are commonly interpreted as indicators of flow conditions during or shortly after deposition and are almost never interpreted to reflect post-depositional homogenization due to bioturbation. Deep-water deposits of the lower Rio Dell Formation (Pliocene), Eel River basin (NW California), however, reveal previously unrecognized cryptically bioturbated fabric...

Abstract The present work aims to investigate the reservoir characterizations of Lower Cenomanian Baharyia Formation by creating isoparametic maps calculate petrophysical parameters and detect favorable parts for oil accumulations using available well logging data. is one main hydrocarbon sandstone reservoirs in northern Western Desert Egypt. About 90% field produces form Formation. This has be...

In order to clarify the characteristics of fine-grained sedimentary lithofacies and depositional models in lacustrine environments Chang 7 Member Upper Triassic Yanchang Formation Ordos Basin, we focus on classification controlling factors. Based typical field sections southern combined with methods organic geochemical analysis, polarizing microscopic observation, XRD elemental geochemistry, su...

Grupi and Kashkan marl formations comprise a considerable part of Zagros region. These formations have a considerable erodibility and sedimentation potential because of their special geological and mineralogical characteristics. The objective of this study was to compare the erosion and sediment yield of Kashkan and Grupi formations in Merk watershed located in southeast Kermanshah, using the M...

the present study was carried out to determine the possible origins of sediments entering taleghan dam in northern part of iran, in order to avoid further sedimentation and helping in extension of the useful life of the proposed dam. this was performed by xrd analysis. to do so, first of all, sediment sampling points were positioned along the taleghan river. the collected samples, after coding,...

On 22 May 2017, a groundwater inrush accident occurred in the gob area of coal floor at Dongyu Coal Mine Qingxu County, Shanxi Province, China. The water caused great damage, among which six people died and direct economic loss was about CNY 5.05 million. An elliptical permeable passage appeared point, lithology outburst is mainly fragmented sandy mudstone siltstone roof No.2 lower layer seam N...

Drilling during Ocean Drilling Program Leg 160 (April–May, 1995) revealed important new evidence concerning the internal composition, depositional processes, and age of two mud volcanoes within the Mediterranean Ridge accretionary complex. Holes were drilled at ca. 2000 m water depth on the crest areas, across the flanks of the mud volcanoes, and onto adjacent deep-sea sediments. The main depos...

Comparisons of paleofaunas from different facies are often hampered by the uncertainty in the variation of taphonomic processes biasing the paleoecological parameters of interest. By examining the taphonomic patterns exhibited by different facies in the same stratigraphic interval and area, it is possible to quantify this variation, and assess inter-facies comparability. The fossil assemblages ...