| 词汇 | sedimentary |
| 释义 | sedimentary adjective geology specializeduk /ˌsed.ɪˈmen.tər.i/ us /ˌsed.əˈmen.t̬ɚ.i/ (of rock) made from sediment left by the action of water, ice, or wind: （岩石）沉积的 sedimentary rock沉积岩 Geology: types of rock agglomerate arenaceous arenite asthenosphere asthenospheric emery flinty gneiss haematite indurated intrusive lahar limestone lodestone magma marl marmoreal obsidian sandstone schist sedimentary | American Dictionarysedimentary adjective[ not gradable ] us/ˌsed·əˈmen·tə·ri, -ˈmen·tri/ earth science describes rock made from solid material left by the action of water, ice, or wind Examples of sedimentarysedimentary Obviously, a considerable selective assimilation of specific particles is taking place following ingestion of the bulk sedimentary organic matter. However, we interpret the veins to be a product of extensional deformation and fluid flow, rather than a sedimentary feature. The sharp-based sandstones with traction-generated internal sedimentary structures represent storm eventbeds emplaced by episodic storm-generated currents. In such cases, matching the sedimentary characters is the only way to correlate litho-sections. Higher up in the sedimentary record, calcite becomes the most prominent carbonate mineral. Its imager has recently discovered evidence of ancient lakes with layering features indicative of erosion and sedimentary deposition owing to the action of water. Image processing was applied to find the fringes of characteristic etch pits that are typical for aqueous sedimentary grains. The book is far more than a mere description of sedimentary indicators of facies and of fossils as tracers of environment. Formation by marine and littoral processes is inferred from marine fossils, glauconite and sedimentary features in the basal sedimentary cover. He then seamlessly explains sequence stratigraphy, with the emphasis on how biostratigraphy is an integral part of this unifying theory of sedimentary geology. Stratigraphic models depict continental margin sedimentation in ever greater numbers, but studies of their real sedimentary sequences have, with exceptions, gently slipped into the background. Most of these sedimentary rock fragments are restricted to coarse arenites and fine diamictites. The sedimentary record shows a hierarchical sequence stratigraphic organization, which implies sea-level changes of different frequencies. Indeed, this signal may ' ' be influenced locally by other parameters such as sedimentary sorting and/or reworking of old taxa into younger strata. Although this book focuses on one relatively limited topic, its significance is far wider and touches on many aspects of sedimentary geology. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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