clast

Also found in: Thesaurus, Acronyms, Encyclopedia, Wikipedia.

clast

(klăst)

A rock fragment or grain resulting from the breakdown of larger rocks.

[From Greek klastos, broken, from klān, to break.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

clast

(klæst)

(Minerals) a fragment of (sedimentary) rock broken off from a larger rock

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

clast

(klæst)

n.

a fragment of a clastic rock formation.

[1950–55; probably back formation from clastic]

ThesaurusAntonymsRelated WordsSynonymsLegend:

Switch to new thesaurus

Noun

clast - (geology) a constituent fragment of a clastic rock

geology - a science that deals with the history of the earth as recorded in rocks

clastic rock - (geology) a rock composed of broken pieces of older rocks

fragment - a piece broken off or cut off of something else; "a fragment of rock"

Mentioned in ?

References in periodicals archive ?

(a) Spectacular image of the ash cloud erupted by the volcano during the early stage of the 2010 activity (https://hiticeland.com/places_ and_photos_from_iceland/eyjafjallajokull causing); (b) back-scattered electron microscope images of different clast types sampled in the basal level of the fallout deposit related to the open phase of the 2010 eruption.

High-Precision In Situ [sup.87]Sr/[sup.86]Sr Analyses through Microsampling on Solid Samples: Applications to Earth and Life Sciences

All samples are characterized by a very heterogeneous fabric with a variety of different clasts embedded in a fine-grained matrix framework.

Using BIB-SEM Imaging for Permeability Prediction in Heterogeneous Shales

Boulder and cobble conglomerates of the Rangeley Formation contain clasts derived from the adjacent pre-Late Ordovician Boundary Mountains terrane.

Provenance and paleogeography of post-Middle Ordovician, pre-Devonian sedimentary basins on the Gander composite terrane, eastern and east-central Maine: implications for Silurian tectonics in the northern Appalachians

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.

Depositional architecture and peculiar sedimentary features of Late Cretaceous Utrillas formation at Tamajon (Guadalajara, Spain)

Figure 7 demonstrate the proportion of the different clasts in each site.

The variation of riverbed material due to tropical storms in Shi-Wen River, Taiwan

Hard mineral clast sediments applied to dry archaeological fields in the distant apical islands of the Polynesian triangle are frequently associated with sweet potato / kumara (Ipomoea batatas (L) Lain.) cultivation.

Molluscan mulching at the margins: investigating the development of a South Island Maori variation on Polynesian hard mulch agronomy

"Clast Label Company is very proud to have earned the Eugene Singer Award for 2011.

Award winners

A variety of clast types is found in the breccia--conglomerate units, especially rocks from the footwall of the deposits (e.g.

Great Mining Camps of Canada 3. the history and geology of the Buchans Mine, Newfoundland and Labrador

This is why we are pleased to announce the formation of the Center for Lane Active-learning of Science and Technology, or CLAST. A consortium of Lane County school districts, the Lane Education Service District and science and math educators from the UO, CLAST provides infrastructure for sharing and refurbishment of instructional materials that focus on science, engineering and related technology.