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 ?
The Coal-bearing Member is dominated by gray-gray black siltstone, silty mudstone and carbonaceous shale and is intercalated with coal seams (M1-M5), while coal seam M5 is recoverable throughout the area.
Core samples of mudstones and limy mudstones were collected from three boreholes: Ispas-1, Krekhiv-1 and Sushne-1.
MUDPIES" The mineral compositions of mudstones at 10 of Curiosity's drill sites differ significantly.
The Curiosity rover has already found proof of ancient lakes in older, lower-lying rocks on Mars, according to reports, as well as a mudstone above Old Soaker.
Capping the whole succession are radiolarian-rich mudstones of the Puig de Ses Fites Formation.
Moreover, it is known that sandstones show strong rigidity, while mudstones show plasticity.
The two sandstone bed zones are located 1,100 to 1,200 meters below the ground and 2,400 to 3,000 meters below the ground, respectively, as there are mudstones on the surface of each of the sandstone beds to seal CO2 and prevent it from emitting outside.
Recently, Edmonton, Canada sub-contractor In-Line Contracting needed a durable, cold-resistant solution to effectively dig through the mudstones and clays common to the area, while maintaining the strict line and grade requirements needed for a gravity sewer.
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.
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.
The silty mudstones and mudstones have flat beddings which reflects the oxidate brink meare lake environment.