chert clause [经] 燧石条款
bedded chert 层状燧石
welded chert 熔合燧石 ; 玉髓燧石
bone chert [岩] 骨状燧石 ; 骨燧石
oolitic chert 鲕状燧石
oocastic chert 空鲕状燧石
oolicastic chert 空鲕状燧石
diatomaceous chert 硅藻燧石
The strata were metamorphised at a low grade and some radiolarian chert beds areintercateted in the upper and middle parts.
2.该套地层为一套浅变质岩系,中上部夹放射虫硅质岩。
参考来源 - 海南屯昌南棍园地区晚古生代地层特征及其构造意义·2,447,543篇论文数据，部分数据来源于NoteExpress
N a microcrystalline form of silica usually occurring as bands or layers of pebbles in sedimentary rock. Formula: SiO2. Varieties include flint, lyddite (Lydian stone) 燧石 (Also called hornstone)
Paleontologists know chert as a good place to look for fossils.
古生物学家以黑硅石为化石采集地点的标志。
Thus we can better understand the deformation of chert in a highly fluid form.
这样我们就能更好地理解燧石在高度流体状态时的变形情况。
The thin-beded siliceous -rocks include chert and depositional quartz with textures of oolite and pebble.
矽质岩包括燧石和沈积石英岩，呈薄层状产出，沈积石英岩具鲕状、砾状结构。
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