The calcarenites carbonate rocks of the Quaternary ridges, which extend along the northwestern Mediterranean coastal plain of Egypt, represent an excellent model for the transformation of loose sediments to real sedimentary rocks by the different stages of meteoric diagenesis. The depositional and diagenetic fabrics of the rocks, in addition to the strata orientation, highly affect their ultima...

the sarghaye-sarnish watershed, with elongated shape and about 70.654 km2 area, is located in south of mashhad. sarghaye and sarnish rivers are the main ones in this watershed. the purpose of this study is to investigate grain size varietions based in sedimentary links and its relation to textural parameters such as sorting, skewness and kurtosis, as well as identification of sedimentary lithof...

 Mineralogical Association of Canada Short Course 43, Winnipeg MB, May 2013, p. xx-xx INTRODUCTION The direct disposal of spent nuclear fuel in geologic repositories, built several hundred metres underground, has been under consideration internationally for 20 to 30 years. Various geologic formations are being, or have been, studied including tuff rock, salt domes, sedimentary clay deposits an...

Study of the interaction between uplift and erosion is a major theme of our science, but our understanding of their interplay is often limited by a lack of quantitative data. A classic example is the Colorado Plateau, for which the starting and ending points are well known: The region was at sea level in the Late Cretaceous, and now, the deeply eroded land surface is at ~2 km. The path of the l...

Soluble and insoluble fractions of the Jet Rock sedimentary organic matter have been subjected to hydropyrolysis to evaluate their biomarker content. Hydropyrolysis is the temperature-programmed pyrolysis of organic matter in an open system fixed bed reactor under high hydrogen pressure in the presence of a sulfided molybdenum catalyst. The hydrocarbon products contain fossil lipids and biomark...

Sedimentary beds of alternating red and green colour are commonly interpreted to reflect orbitally-forced cyclic climatic, syn-depositional conditions, although changes caused by post-depositional fluids also documented. Results from IODP Hole U1502A marine sediments in the South China Sea exemplify reducing fluid–rock interactions that locally changed sediment green. Petrographic, rock magneti...

INTRODUCTION The redox state of sillimanite zone (650–700°C, 5–6 kbar) metasediments of the Barrovian type area, Scotland, was investigated The chemical and mineralogical evolution of the crust using estimates of metamorphic oxygen fugacity (fO2 ), sulfur fugacity during orogenesis is critically dependent upon the redox (fS2 ), and fluid chemistry based on new determinations of mineral state of...

Introduction: Over 13 years after landing at Meridiani Planum and in her 10 extended mission, Mars Exploration Rover Opportunity continues to explore the rim of ~22 km diameter Endeavour crater [1]. The rim exposes material that is older than the S-rich, layered sedimentary rock covering the Meridiani plains and filling much of the interior of Endeavour. Clay mineral exposures at the rim have b...