| 词汇 | diamictite |
| 释义 | BETA Examples of diamictitediamictite isn’t in the Cambridge Dictionary yet. You can help! The uppermost diamictite is also inversely (bottom) to normally graded (top). These they ascribed to the pressing of clasts from the diamictite into the substrate as flow ceased. This indicates that at the time of diamictite deposition a polished surface was not (or was no longer) present over the whole pavement. This mudstone is overlain by the upper diamictite. Intercalations of diamictite facies are the result of debris flows. Nevertheless, they noted that the diamictite may be composed of glacially derived material that was subsequently reworked by debris-flow action. Fourth, the significance of conspicuous disconformities in a diamictite succession is not always clear in terms of sea-level history, particularly in dominantly continental successions. Third, if marine fossils are absent, it might be difficult to establish with certainty if a particular diamictite unit is of continental or marine origin. Both these directions pass under the diamictite. However, as a polished surface is preserved within some striations, it was presumably originally present everywhere, but was generally weathered or eroded away prior to deposition of the diamictite. That the striations had a glacial origin does not prove that the overlying diamictite is a tillite or, if it is, was in any way related to striation formation. The unlithified equivalent of a diamictite is known either as a diamicton or diamict. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These glacial deposits include diamictite, varved shale and mudstone with dropstones, fluvioglacial gravel and conglomerates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The age of the diamictite is not certain. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The beds of puddingstone are complexly interbedded with layers of massive diamictite and laminated and graded argillite and sandstone. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Lithified diamicton is referred to as diamictite. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Although the term diamictite is often used for poorly sorted, lithified glacial deposits, this term is applied to this type of sedimentary rock of any origin. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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