| 词汇 | cementation |
| 释义 | cementation noun[ U ] geology specializeduk /ˌsiːˌmenˈteɪ.ʃən/ us /ˌsiːˌmenˈteɪ.ʃən/ the process by which solid material that has been dissolved in water sticks together to form rock when the water evaporates (= changes to a gas)胶结 Geology - general words aeolian Anthropocene anticline apophysis auriferous biozone carboniferous continental plate geomorphic gully erosion henge Holocene hoodoo petrographic petrographically petrography petrological petrologically Precambrian rockfall cementation | American Dictionarycementation noun[ U ] us/ˌsiˌmenˈteɪ·ʃən/ earth science the process by which solid material that has been dissolved in water sticks together to form rock when the water evaporates (= changes to a gas) Examples of cementationcementation These smallest fabric elements most likely are formed by the early cementation of a complex consortium of mat-building cyanobacteria, heterotrophic bacteria and eucaryotic algae. Only one of the socalled 'cement-like' bands is laterally extensive, and other 'cement-like' bands are localized due to groundwater cementation. Cementation seems to have occurred after considerable compaction, since adjacent grains are frequently in contact, with the syntaxial growth infilling corners between grains. A method which played a significant role in the development of the concept of the chemical compound, was the extraction of copper through cementation. Loose packing of framework grains shows that quartz cementation was initiated prior to major compaction but probably continued until relatively recent times. Conglomerates show a low to medium degree of cementation. Presumably, as deformation continues, new fracture pathways develop, replacing those which become sealed by cementation and pressure solution. The carbonate cementation as well as the carbonate in the cavities is derived from local circulation of hydrothermal fluids. Magnetic-susceptibility and gamma-ray values for this lithology are variable and partly depend on the degree of cementation. The origin of large-scale quartz cementation: evidence from large data sets and coupled heat-fluid mass transport modelling. Fixing resulted from the processes of trapping and binding of traction-transported sediments, and early cementation. Milky quartz and trace ankerite showing several phases of brecciation and cementation associated with the major phase of fault activity. In such an increasingly siliciclastic environment the number of topographic relief-developing structures is limited as the mobility of the sea-bottom increases and the potential for early cementation decreases. I was a little disappointed that there was no discussion of the need for integrated scanning cathodoluminescence imagery, especially to reveal the extent of silica grain cementation in sandstones. This is the cementation of reaction for ever. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 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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