shale |
1. A shell or husk; a cod or pod. "The green shales of a bean." 2. [G. Shale. <geology> A fine-grained sedimentary rock of a thin, laminated, and often friable, structure. Bituminous shale. See Bituminous. Origin: AS. Scealy, scalu. See Scalme, and cf. Shell. Source: Websters Dictionary (01 Mar 1998) |
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alum shale |
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