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Related to clasts: clastic rock, Lithification
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  • noun

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(geology) a constituent fragment of a clastic rock

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Carlton and others (1998) observed shocked quartz in shale clasts from polymict breccias collected from a core from the Serpent Mound central uplift, indicating peak shock pressures > 10 GPa (Koeberl and others, 1998).
5-10 cm wide dike is composed of sandy material consisting of abundant clasts of sandstone, siltstone, and claystone, resembling the rocks of the Gauj a Formation.
An exception to the fine grain sizes is a zone near the middle of the Naheola which may contain coarse-grained sand and granules or clay clasts up to boulder size (Swann, 1999).
He wrote of 'being laughed at by country people while I chipped striated clasts from tillite well within the tropics not far from plantations of bananas' (Coleman, 1939, p.
Calcium carbonate formed abundant coatings beneath surface clasts and around many profile clasts, but a cohesive surface crust was lacking and the surface and subsurface soil was loose except where it was frozen.
Breccia clasts consist of microcrystalline dolostone petrographically identical to the upper entirely dolomitized portion of the Fenestral Lithofacies.
The coarse nature of the "Lafayette" as well as the presence of boulders and clay clasts suggests shorter transport and possibly a smaller basin.
Additional observation about the colors of the organic clasts, which can be used as thermal alteration indices (TAI: scale of 1 to 5), was made in this study.
According to Hallet, large rocks, or clasts, commonly freeze up through the soil.
La Negra is a strong and explosive diatreme breccia as evidenced by the strong tourmaline-sericite-quartz alteration throughout the matrix and dominant sericite alteration of clasts and textures and variety of clasts.
These clasts must have been bored in shallow water and transported downslope.
Limestone clasts inherent in the ore combined with waste dilution from mining created excessive grade dilution.
Massive cement is mainly found in the fine-grained sand matrix, or in the absence of sand a thin cement crust surrounds coarse gravel and pebble clasts.
The link between dark material on Vesta and dark clasts in HED meteorites provides us with direct evidence that these meteorites are indeed from Vesta.
It was in an area with abundant limestone clasts and the sedimentary matrix was stained with parches of red ochre.