argillite

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argillite

[′är·jə‚līt]
(petrology)
A compact rock formed from siltstone, shale, or claystone but intermediate in degree of induration and structure between them and slate; argillite is more indurated than mudstone but lacks the fissility of shale.

argillite

A rock containing chiefly clay materials; derived from claystone, siltstone, or shale; used locally as building stone, although rarely produced commercially.
References in periodicals archive ?
Unit Gh-5-3.5 m of dark grey argillites (individual beds up to 0.6 m thick) with subsidiary beds of limestone up to 0.35 m thick.
For instance, in Estonia, oil is produced only from one oil shale type, kukersite, due to its satisfactory yield (23%), whereas the processing of graptolite argillite, the other type of oil shale, gives but a low yield of the target product (1-2%) [22].
[18] analyzed deformation mechanisms induced by desiccation in Tournemire argillite specimens with a height of 200 mm and a diameter of 78 mm using the DICM.
The poor correlation within the lower subsystem is in agreement with the great heterogeneity of the bedrock, where low-permeability argillites coexist with higher permeability fractures and dissolution openings.
Caracterisation experiementale du comportement hydromecanique des argillites de Meuse/Haute Marne.
It is composed of several igneous layers emplaced into argillites. The thickness of this part increases from the SE (5-50 m in the Moncayo sector) to the NW (30-100 m in the Cameros sector) (Fig.
The Vendian sedimentary rocks (argillites and siltstones) covering the crystalline rock surface is observed only to the south of investigated area (the southern part of Bolshoy Beriozovy Island).
Multiple, banded quartz veins range from continuous veins 0.2 to 4.3 meters thick, to vein swarms and sheeted vein sets within brecciated, siliceous argillite. Vein dips range from 35 to 60 degrees, dipping to both the east and west.
2 lens and concluded that they "have developed through mineralization and silicification of schistose zones in the altered porphyrite or greenstone near its contact with the argillites".
Classification, parent materials, localisation in the Sao Paulo State, and sampling depth of soils Soil Classification Parent material 1 Typic Hapludox Sandstone 2 Rhodic Acrudox Argillites 3 Typic Hapludox Schist 4 Rhodic Acrustox Basalt 5 Rhodic Acrudox Diabase 6 Rhodic Acrudox Argillites 7 Typic Hapludox Basalt 8 Typic Hapludox Argillites 9 Xanthic Acrustox Basalt 10 Typic Hapludox Granite 11 Rhodic Acrustox Basalt 12 Xanthic Acrustox Diabase Soil Localisation Depth (m) 1 Aguai 0.80-1.00 2 Piracicaba 0.80-1.00 3 Piracicaba 1.00-1.20 4 Guaira 0.15-0.30 5 Leme 0.70-0.80 6 Cordeiropolis 0.50-0.60 7 Ribeirao Preto 0.30-0.40 8 Itirapina 0.30-0.50 9 Guaira 0.40-0.60 10 Espirito Santo do Pinhal 1.30-1.50 11 Miguelopolis 0.15-0.35 12 Ribeirao Preto 0.40-0.70 Table 2.
Different stone colors, including red and green argillites and buckskin limestone found along the alignment, were reflected in adjacent guard walls.
In Estonia the Lower Ordovician succession is represented by quartzose sandstones of the Kallavere Formation, dark laminated graptolite argillites of the Turisalu Formation, and light claystone of the Varangu Formation of the Tremadoc Age, followed by glauconitic silts, sands or calcareous sandstones of the Leetse Formation, and glauconitic limestones of the Toila Formation of the Arenig Age (Mannil & Meidla 1994).