clay shale

clay shale

[¦klā ¦shāl]
(geology)
Shale composed wholly or chiefly of clayey material which becomes clay again on weathering.
Consolidated sediment composed of up to 10% sand and having a silt to clay ratio of less than 1:2.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
There are three types of oil shale: clay shale, siliceous shale and calcareous shale.
Among them are the experimental study of static disintegration on unsaturated soil, the numerical simulation analysis of bearing characteristics on super-large diameter rock socketed pile, physical and mechanical features of clay shale in the Bayingobi Basin of Inner Mongolia, the status of research and remaining problems in the nondestructive testing of bolts, the seismic response of assembled precast concrete residences, the numerical simulation of the flow field in a micro-pressure inner loop reactor, calculating and analyzing gravity head coefficient in a hot water heating system, and the mechanical behavior of concrete short columns pushed out from over-thick steel tubes.
Nichols (1980) reviewed the literature concerning valley-floor expansion in terrains composed of clay, clay shale, and shales interbedded with limestones and dolomites.
Valley floor rebound due to stream incision in Tertiary and Cretaceous siltstones, clay shales, and sandstones of the Great Plains of Canada and the western United States is well documented in engineering literature concerning damsite investigations.
Soil Types: Sand site--(SP/SP-SM) uniform, medium dense, clean to silty (13.5 m) over clay shale (16.5 m).
Overall, the subsurface profile showed that most of the tunnel could be constructed within low-strength clay shale. In the downstream 350 ft, at the north end, are alluvial deposits and mixed-face conditions.
The tunnel's vertical alignment was designed to remain within the unweathered clay shale to the greatest extent possible.
The classification is as follows: shale is called "black shale" when sapropel content is less than 5% [6]; and it is known as clay shale with rot when sapropel component content is between 5 ~ 25%; when sapropel content is between 25 ~ 50%, we call it rot muddy shale/sapropelic shale.
and Malis, J.: 2012, Determination of chlorite, muscovite, albite and quartz in claystones and clay shales by infrared spectroscopy and partial least-squares regression.
This volume also contains the 33 keynote presentations on recent advances in geotechnics, covering such topics as developments in understanding soil behavior, ground performance and building response due to tunneling, comparative study between liquefaction and instability of sand, inherent anisotropic stiffness of decomposed tuff and alluvium, and mechanical behavior of highly fissured sheared clay shales, to cite a few.
Although the quartz content of clay shales of the Dividal Group is slightly higher (secondary silicification?), the Si[O.sub.2]: [Al.sub.2][O.sub.3] ratio in both cases is similar to the original illitic composition of the clay mineral.
The aim of this study is the determination of majority minerals (chlorite, muscovite, albite and quartz) in claystones and clay shales by IR spectroscopy combined with partial least-squares regression.