detritus

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Related to detrital: detrital minerals, Detrital sediment

detritus

1. a loose mass of stones, silt, etc., worn away from rocks
2. the organic debris formed from the decay of organisms

Detritus

 

(1) In biology, dead organic or partially mineralized matter suspended in water in the form of particles measuring from several microns to several centimeters. Detritus forms from moribund plants and animals or their excretions, and frequently the organic matter is adsorbed on the surface of mineral suspensions. Microorganisms are al-ways present in detritus, which serves as the principal food for the water animals known as detritophages.

(2) In geology, detritus is organogenetic fragmentary material found in sediments or sedimentary rocks and composed of shell fragments; the skeletal fragments of sponges, bryozoans, corals, or other invertebrates; and the bones of vertebrates (bone detritus) and fragments of plant tissue (plant detritus).

detritus

[də′trīd·əs]
(ecology)
Dead plants and corpses or cast-off parts of various organisms.
(geology)
Any loose material removed directly from rocks and minerals by mechanical means, such as disintegration or abrasion.

detritus

Loose material which results from the disintegration of rock.
References in periodicals archive ?
7) is the only place where there is clearly no tectonic discontinuity between the limestones and the underlying detrital sediments.
Specifically, detritus based food webs are not isolated from aboveground consumption; and, aboveground predators are quite capable at feeding at the belowground interface, making use of that majority of ecosystem production that has become a part of the detrital pathway.
Although some lines of reasoning lead to the conclusion that detrital food webs should exhibit strong donor control (Pimm 1982), examination of the complexity of possible trophic interactions leads to the prediction that either an increase, no change, or even a decrease in predators is a possible outcome to enhancement of the resource base of a detritus-based web (Abrams 1993, Persson et al.
47) contents further indicate that weathering clay minerals with more radiogenic Sr and lower Sr content should have had an important role in the detrital input to oil shale.
No regularity over space and time exists in the transportation between the initial erosion and final deposition of the detrital material.
Layer D is rich in clay minerals, but in IR no particles similar to terrigenous detrital quartz grains were found.
2007) reported a prominent Ordovician population of detrital zircons in the Berwick Formation probably derived from an emergent Casco Bay/Falmouth-Brunswick terrane.
The deltaic sandstone of the Khojak Formation, turbidite succession of the Panjgur Formation and molasse strata of the Muree Formation (Himalayan fore lands) have recorded outstandingly similar detrital modes (Critelli and De Rosa, 1987; Critelli et al.
Besides pyrite, all of the studied samples also contain iron-titanium oxides with a variable Fe/Ti ratio scattered as micrometre-sized or smaller possibly detrital particles within the calcite or dolomite matrix (Fig.
The results revealed that detrital input is possibly the main source of kaolinite, chlorite and illite, while in situ neoformation during the Tertiary shallow saline and alkaline environment could be the dominant cause of palygorskite occurrences in the sedimentary rocks.