clast


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clast

 (klăst)
n.
A rock fragment or grain resulting from the breakdown of larger rocks.

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

clast

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

clast

(klæst)

n.
a fragment of a clastic rock formation.
[1950–55; probably back formation from clastic]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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"
References in periodicals archive ?
Boulder and cobble conglomerates of the Rangeley Formation contain clasts derived from the adjacent pre-Late Ordovician Boundary Mountains terrane.
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.
The differences between the two types of pyroclastic surge deposits at Irazu are not due to an inherent difference in the eruptive mechanisms but can probably be correlated to different water contents in the moving cloud preventing the elutriation of the fine ash in the case of wet surge, thus preserving the clast size distribution during the fragmentation.
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.
In some sedimentary breccias, termed 'granite conglomerate', they are the dominant clast type.
It is noteworthy that CLAST members will save money in adopting hands-on, inquiry-driven science kit curricula.
Clasts (size > 2 mm) of conglomerates are composed of limestone, marble, quartzite, sandstones, schist, phyllite, granite and gneiss.
This document addresses the CLAST results for Miami-Dade Community College (M-DCC) in June 2002.
18 Enrolled 78 62% Spring Semester 1997 Average Average Students Students Math Semesters Repeated Took Major Level Taken Course Course CLAST Business 3 3rd 8 8 Enrolled Non-Business 2 6th 22 64 Enrolled
Plus, they lack the motivation of my community college students, many of whom see the correct use of the language as important to getting the job of their choice or to passing Florida's CLAST (College Level Academic Skills Test), a more immediate goal for them.