chert 
(chûrt)
(chûrt)n.
1. A variety of silica that contains microcrystalline quartz.
2. A siliceous rock of chalcedonic or opaline silica occurring in limestone.
[Origin unknown.]
cherty adj.
| 单词 | chert |
| 释义 | chert (chûrt)n. 1. A variety of silica that contains microcrystalline quartz. 2. A siliceous rock of chalcedonic or opaline silica occurring in limestone. [Origin unknown.] cherty adj. |
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