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1. Separable into parts or having removable sections: a clastic anatomical model.
2. Geology Made up of fragments of preexisting rock; fragmental.

[From Greek klastos, broken; see clast.]

clas′tic n.


1. (Geological Science) (of sedimentary rock, etc) composed of fragments of pre-existing rock that have been transported some distance from their points of origin
2. (Biology) biology dividing into parts: a clastic cell.
3. (Medicine) able to be dismantled for study or observation: a clastic model of the brain.
[C19: from Greek klastos shattered, from klan to break]


(ˈklæs tɪk)

1. composed of fragments or particles of older rocks or previously existing solid matter; fragmental.
2. pertaining to an anatomical model made up of detachable pieces.
3. Biol. breaking up into fragments or separate portions; dividing into parts.
[1870–75; < Greek klastós broken, v. adj. of klân to break + -ic]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.clastic - of or belonging to or being a rock composed of fragments of older rocks (e.g., conglomerates or sandstone)
geology - a science that deals with the history of the earth as recorded in rocks
disintegrative - tending to cause breakup into constituent elements or parts
2.clastic - capable of being taken apart; "the professor had a clastic model of the human brain"
detachable - designed to be unfastened or disconnected without damage; "shirts with detachable collars"
References in periodicals archive ?
In North Greenland the southern carbonate platform and the northern clastic trough are exploration targets.
Presents overviews of sequence stratigraphy in rifts and structural controls on clastic and carbonate sedimentation-critical to the exact mapping of the most lucrative hydrocarbon locations by exploration geologists
Analysis of the integration of this seismic data with regional well data identified gas prospects AO1 and AO2 in the Aptian clastic onlap play.
The Early Triassic clastic and carbonate mixed lithologies of Mianwali Formation of the Musa Khel Group is well exposed in the Nammal gorge section in the Western Salt Range Pakistan.
The oilfields in West Java and its offshore are reservoired in clastic and carbonate rocks and in fractured volcanics.
5m cubic feet of natural gas per day, creating the highest capacity of clastic rocks in Bohai.
The first book- length history of clastic sedimentology, it provides students, general readers and specialists with a clear understanding of the contribution of sedimentology to the science of geology.
Alex Brown in his chapter "Redbeds: source of metals for sediment-hosted stratiform copper sandstone copper, sandstone lead, and sandstone uranium-vanadium deposits" reviews conventional genetic models for the deposit types listed in the title, illustrated by some case examples, For all deposit types, the ore-forming process involves the early oxidative diagenesis of first-cycle continental clastic sediments; the leaching of metals from labile minerals by saline groundwaters; and the transport of the metals by groundwater flow to a reductive subsurface environment, such as beds containing organic detritus or digenetic pyrite, where the metals are precipitated.
Until the early 1990s, little was known of the pre-Permian section but it was already supposed that clastic sediments were better represented than they were in the younger section.
Tertiary volcanics dominate the area and are underlain by a variety of clastic sediments and, in part, by gypsumbearing redbeds that are poorly exposed.
PART 1 MAKING SEDIMENT Chapter 1 Clastic sediment as chemical and physical breakdown products.