siltstone

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  • noun

Words related to siltstone

a fine-grained sandstone of consolidated silt

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References in periodicals archive ?
- Strong Zn in soil anomalism occurs over an area 800m by 400m in shales and siltstones.with maximum Zn to 373ppm and Pb to 248ppm.
Where breccias were initially identified in core as weakly to very strongly silicified units of siltstone and mudstone, surface exposures have identified that the main Percival breccia also includes altered and silicified banded iron formation (BIF) and BIF slump breccias where magnetite appears to be replaced by pyrrhotite.
The Ishim sedimentary rhythm is crowned by a quite distinct unit of lacustrine fine-dispersed ("mealy") pelitic siltstones, pale gray to nearly white, velvety soft, massive without visible bedding or with indistinct irregular parallel bedding.
Within these deposits four lithostratigraphic units composed of conglomerates, sandstones, siltstones, shales, marls, gypsum, bioclastic and hippuritic limestones are recognized.
The second body is gray-greenish to yellow-greenish siltstones and fine sandstones and conglomerates exhibiting rather round clasts with cross-bedding and ripple marks.
The following unit, Member 6 at the base of the Vtorye Utyosy Formation, is represented by highly foliated dark shales and siltstones with a total thickness of about 250 m (Sennikov et al.
Rocks in the lower part consist in general of mauve sandstones, siltstones and greyly green siltstones interbedded with a few intercalated mud boulder horizons.
The drilling at Red Hills has shown that the Palapye Group comprises conglomerates, sandstones and siltstones up to 8 m thick overlying basement granite.
It features a 3,000ft succession of sandstones, mudstones and siltstones.
In red and green siltstones, and in sandstones of the Upper Triassic estimated to be 200 million years old, they found an abundance of fossils.
The [E.sub.1][F.sup.1] is about 500~600m thick with vary thick alternate layers of light grey and light brown sandstones, siltstones and silty mudstones.
Fossil megaripples were accidentally discovered during expansion of a factory car park as workers used a backhoe to remove rock from a northwest dipping sequence of alternating coarse sandstones and siltstones within the Hampton Formation (Lower Cambrian).