clast

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clast

(klăst)

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

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

clast

(klæst)

(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]

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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"

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References in periodicals archive ?

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)

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.

La erupcion estromboliana violenta y freatomagmatica de 1723 en el volcan Irazu, Costa Rica

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.

Iron nodules in ferric soils of the Fraser Coast, Australia: relicts of laterisation or features of contemporary weathering and pedogenesis?

In some sedimentary breccias, termed 'granite conglomerate', they are the dominant clast type.

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

It is noteworthy that CLAST members will save money in adopting hands-on, inquiry-driven science kit curricula.

Science project

Clasts (size > 2 mm) of conglomerates are composed of limestone, marble, quartzite, sandstones, schist, phyllite, granite and gneiss.

Morfometria y dinamica de los sedimentos en el area Del Rio Churiya, Serrania De Siwalik en Nepal

The lawsuit led the system in the mid-1990s to introduce two alternatives to the CLAST.

Testing: some colleges have recently embraced standardized tests, while others still reject them. As the story continues, will the tests be coming to a community college near you?

The high clast content, poor sorting, numerous angular clasts, and absence of bedding (Fig.

Clastic dikes in Middle Devonian sandstones of the Gauja Formation, southeastern Estonia/Settesooned Kesk-Devoni Gauja kihistu liivakivides Kagu-Eestis

This document addresses the CLAST results for Miami-Dade Community College (M-DCC) in June 2002.

CLAST Results, June 2002. Information Capsule

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

COMPARATIVE ANALYSIS OF BUSINESS AND NON-BUSINESS STUDENTS' PERFORMANCES IN FINANCIAL ACCOUNTING: PASSING RATES, INTEREST AND MOTIVATION IN ACCOUNTING, AND ATTITUDES TOWARD READING AND MATH

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.