| 词汇 | sandstone |
| 释义 | sandstone noun[ U ] uk /ˈsænd.stəʊn/ us /ˈsænd.stoʊn/ a type of rock formed from sand砂岩 DonNichols/iStock/Getty Images Plus/GettyImages Geology: types of rock agglomerate arenaceous arenite asthenosphere asthenospheric emery flinty gneiss haematite indurated intrusive lahar limestone lodestone magma marl marmoreal obsidian schist shale sandstone | American Dictionarysandstone noun[ U ] us/ˈsændˌstoʊn/ a soft, yellow or red rock, often used as a building material Examples of sandstonesandstone A package of impure fine sandstone with poorly developed bedding follows in the succession. As a result, joints that traverse impermeable deformation band shear zones may provide the primary pathways for fluid flow in sandstones compartmentalized by these zones. Numerous thin sandstone beds (in general about 10 cm thick) are separated by thicker units of flaser-bedded siltstones and mudstones. Incubation vessels inside the chamber were filled with sterile sand, inoculated with crushed sandstone-based biofilms and allowed to incubate for 5.5 months. The c. 25 m of purple, fine-grained sandstones below include quartz-arenitic intercalations and have an essentially calcareous matrix. In the channel casts, the sandstone packages are separated by oscillation wave ripples and microbial structures. The sharp-based sandstones with traction-generated internal sedimentary structures represent storm eventbeds emplaced by episodic storm-generated currents. Some conglomerates contain thin (< 10 cm) lenses of sandstone. These conglomerates are composed of clasts of basalt, volcaniclastic sandstone, alkaline lava and sub-rounded chert. This consists of coarse-grained sandstones with frequent pebbles or thin interbeds of small pebble conglomerates. This second phase of electron microscopy was carried out to determine accurate percentages of each mineral phase present in the different sandstones. This facies occurs as beds of coarse or medium to fine, normally graded sandstone between 0.3 and 1.0 m thick. Interbedded thin fine-grained sandstone and siltstone layers are laminated and wavy in nature. The siltstones commonly contain detrital white mica flakes that are generally lacking in the sandstones, and are possibly of distal continental origin. The sandstones are the more reliable indicators of the state of evolution of arcs of this type, as they represent near-source deposition. 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. Collocations withsandstonesandstoneThese are words often used in combination with sandstone. Click on a collocation to see more examples of it. massive sandstone Its lower levels are built of cyclopean masonry - massive sandstone blocks that were quarried on site. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. red sandstone In an image containing these rocks, the computer vision system found several of them to be more interesting than the surrounding redsandstone. sandstone arch Its stage is under a sandstone arch and its seats are carved from wood. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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. See all collocations with sandstone |
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