shale 
(shāl)
(shāl)n.
A fissile rock composed of layers of claylike, fine-grained sediments.
[Probably from Middle English, shell, from Old English scealu; see skel-1 in the Appendix of Indo-European roots.]
shaley adj.
shale
| 单词 | shale |
| 释义 | shale (shāl)n. A fissile rock composed of layers of claylike, fine-grained sediments. [Probably from Middle English, shell, from Old English scealu; see skel-1 in the Appendix of Indo-European roots.] shaley adj. shale |
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