clasts


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Related to clasts: clastic rock, Lithification

clasts

Rock fragments, such as those that form mud, sand, and gravel.
References in periodicals archive ?
The oldest Devonian deposits exposed in the vicinity of the Borschovo Village are siliciclastic ones, such as white sandstones with trough cross-stratification and clay clasts.
Boulder and cobble conglomerates of the Rangeley Formation contain clasts derived from the adjacent pre-Late Ordovician Boundary Mountains terrane.
Some very old mud volcano deposits, comprising mud supporting chaotically distributed angular to subrounded sandstone clasts resembling with the Dasht Murgha group and a cluster of chimney-shaped features composed of very coarse sandstone with intraclasts of the host rocks are also present.
In this sense, it is important to point out that only a very small fraction of the clasts are ventifacts; being the vast majority, however, rounded or subrounded clasts of the same lithology and size than the ventifacts.
A secondary objective is to investigate a method to mechanically sort the unmineralized clasts (cobbles and boulders) from the mineralized matrix material of the conglomerates.
The lowermost Muthaymimah Formation is massively bedded and includes large angular exotic clasts of both carbonates and reddish 'basement' lithologies which were emplaced as submarine debris flowed along a submarine slope channel (Fig.
These processes mainly reflect interaction of the basaltic glass clasts and glass rich matrix with the percolating water, including palagonitization, formation of authigenic clays, zeolites and calcite (Kabesh et al.
2 (described in the American Mineralogist article) investigate the very fine scale bonding environments of aluminum and silicon (also carbon and calcium) in poorly-crystalline C-A-S-H and crystalline Al-tobermorite in relict lime clasts, The high-pressure X-ray diffraction analyses performed at ALS beamline 12.
Following the method of Sheridan and Marshall (1983), the most representative grain size classes were first examined by stereomicroscope to distinguish glass, lithics, and crystals, and subsequently were cleaned by a weak 30 second ultrasonic treatment in distilled water, which did not modify the original features of the clasts.
The clasts, or pebbles within the rock formation, appear to have been rounded by erosion while carried through water, such as in a stream or river.
Bulk samples collected from the profile were sieved into five size fractions (<2, 2-4, 4 8, 8 16, and >16mm) to separate rock clasts and Fe nodules of different sizes from the fine earth fraction.
Conglomerate units are composed of rounded, sub- rounded and sub-angular clasts of igneous, metamorphic and sedimentary origin, which are dark-pink, dark-brown, maroon, white and green in colour.