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 ?
These conglomerates include angular to sub-rounded heterometric clasts of igneous rocks, dolomites, argillites and quartzites (Fig.
The Eskay Creek deposit in the Iskut River area consists of precious metal-rich sulfide-sulfosalt lenses in argillite and veins in a footwall rhyolite.
5 metres of steeply dipping, interbedded, light yellow-grey to light grey argillite, calcareous argillite and minor siltstone.
The occurrence of Middle Cambrian to Late Ordovician organic-rich black shale deposits in an extensive area of Sweden (alum shale [1]), the Oslo region [2], Bornholm [3], Estonia (known as graptolite argillite, "Dictyonema shale" [4], and kukersite as proper oil shale), Poland [5] and NorthWest Russia [6] has been known for a long time.
On the geochemistry of postsedimentary mineral formation in the Tremadoc graptolitic argillites of North Estonia.
Geological horizons can be recognized clays Plicatules the Aptian, argillites Callovian-Oxfordian clays and marls of the Gault, clays and marls domeriennes without this list being exhaustive.
Surface mapping and prospecting on the Dewdney Trail Property have identified areas with anomalous gold mineralization along a 13 kilometre trend of quartz-sericite-carbonate altered quartzite and interbedded argillites.
The Kurejka Fm (up to 104 m thick) is represented by grey, green and red argillites and marls.
Geological horizons can be recognized clays Plicatules the Aptian, Callovooxfordien argillites, clays and marls Gault clays Domerian, without this list being exhaustive.