mudstone

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mudstone

[′məd‚stōn]
(geology)
An indurated equivalent of mud in the form of a blocky or massive, fine-grained sedimentary rock containing approximately equal proportions of silt and clay; lacks the fine lamination or fissility of shale.
References in periodicals archive ?
These finely laminated mudstones are very similar to those we see on Earth," says Woody Fischer, professor of geobiology at Caltech and coauthor of the paper.
oil-saturated argillaceous limestone and mudstone rock sections, which
Comparison of geochemical indices used for the interpretation of palaeoredox conditions in ancient mudstones.
This section, which consists of light-coloured uppermost Hirnantian mudstones with Hirnantia fauna and M.
In fact the peds will rub down to silty clay loam - quite a fine texture - as the original soil particles are rich in clay and silt derived from mudstones.
Core samples of the crossing area found clay with layers of fractured, hard mudstone 20-feet below the surface.
This mineralization consisting of finely bedded sphalerite and pyrite with minor galena and chalcopyrite occurs below the main exhalite (red jasper/green to grey chert) horizon and is located within mudstones, mudstone breccias and dacite breccias.
They state that in Tasmania, sodic soils have formed predominantly from Triassic and Permian mudstones and sandstones, Tertiary clays, and unconsolidated Quaternary deposits and reported surface horizon pH values of 5.
The material will include soil, clay, sand, gravel and mudstones.
It features a 3,000ft succession of sandstones, mudstones and siltstones.
Fabrics defined by the alignment of clay particles are widely reported from mudstones, and generally attributed, if they are bedding-parallel or sub-parallel, to compaction during dewatering and diagenesis (see review in Kisch 1991 and papers by Oertel and Curtis 1972, Moon 1972, Krizek et al.
A SPECIAL one-mile walk will let people discover the sandstones, mudstones and fossils around Brockholes.