| 单词 | chert |
| 释义 | chert (once / 45285 pages) n WORD FAMILY chert: cherts, cherty USAGE EXAMPLES“If you look at the actual tomb, you have these inclined limestone layers with dark nodules of chert—exactly as drawn in the tomb plan.” National Geographic(Jul 25, 2016) Some can be spotted because freshly worked flint, also called chert, will have a slightly lighter color than the rest of the point. Washington Times(Jul 03, 2016) Her team excavated and radiocarbon-dated the river’s sediment layers with meticulous care, and the chert knife and flakes are clearly human artifacts. National Geographic(May 13, 2016) n variety of silica containing microcrystalline quartz Hypo|Hyper taconite a variety of chert containing magnetite and hematite; mined as a low-grade iron ore silica, silicon dioxide, silicon oxide a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite |
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