HyperDic: humic_shale

English > 1 sense of the expression humic shale:
NOUNsubstancehumic shaleshale that is rich in humic acids
English > humic shale: 1 sense > noun 1, substance
Meaningshale that is rich in humic acids.
Broaderhumatematerial that is high in humic acids
shaleA sedimentary rock formed by the deposition of successive layers of clay

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