The Pacific Rim Complex is exposed in a fault-bounded slice along the west coast of Vancouver Island. It is divided into two parts: (I) the Ucluth Formation, a basement unit composed of lower Mesozoic arc-volcanic rocks, and (2) a suprajacent sedimentary se­ quence, more than 2 km thick, composed of Lower Cretaceous olistostromal melanges. An unconformity is present, at least locally, at the Uc...

The lithofacies assemblages in the lacustrine shale of Shahejie Formation Dongying Depression have different compositions due to complex depositional climate, lake water conditions, and sediment supply. Hence, types conditions were analyzed based on parasequence division classification. According gamma ray integrated prediction error filter analysis (INPEFA), handheld x-ray fluorescence (XRF) m...

-This paper based on crossplot and core data,analysis the Pu Xi oilfield ,Putao Hua oil layer ‘s conventional logging response characteristic.Based on the describe of the three cored wells, Putao Hua oil layer is mainly made up with siltstone, muddy siltstone, silty mudstone,. First normalized the well logging curves, elimination the influence of the nongeological factors to the well logging cu...

The petroleum industry’s use of horizontal drilling and hydraulic fracturing technologies has changed organic-rich mudstones, like the Devonian Marcellus Formation, from conventional hydrocarbon sources and seals to unconventional ‘shale gas’ reservoirs. Organic-richness and formation brittleness are two principal components of reservoir quality assessment, as the former is indicative of the am...

THE SANDU FORMATION, consisting mainly of mudstone and marl, crops out sparsely in Guole Township, Jingxi County, southwestern Guangxi Province, China (Fig. 1). It yields a rich fauna of trilobite fossils, including species belonging to Shergoldia, Tamdaspis and Sinosaukia, which together indicate a late Furongian (latest Cambrian) age. These fossils are both abundant and well preserved. A larg...

Sea urchins are dominant members of rocky temperate reefs around the world. They often occur in cavities within the rock, and fit so tightly, it is natural to assume they sculpted these "pits." However, there are no experimental data demonstrating they bore pits. If they do, what are the rates and consequences of bioerosion to nearshore systems? We sampled purple sea urchins, Strongylocentrotus...

As a natural building material and environment, red-bed mudstone has special engineering properties due to its formation conditions. The disaster caused by these is becoming increasingly prominent. Therefore, it of great theoretical significance practical value study the macro- micromechanical mudstone. Nanoindentation mechanical tests are carried out on from Chuxiong, Jingdong, Nanhua in Yunna...