Read Edit View history 泥岩 níyán mudstone Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 泥岩 · níyán · mudstone 2026/03/04 泥岩 níyán mudstone A fine-grained sedimentary rock whose original constituents were clays or muds, including shale. 这里的地层主要由泥岩和砂岩交替组成。 noun created sense Mar 4, 2026, 02:25 AM