单词	mudstone
释义	mudstone /ˈmʌdstəʊn / noun [mass noun] A dark sedimentary rock formed from consolidated mud and lacking the laminations of shale.The sedimentary lenses are composed of limestone, sandstone, siltstone, mudstone, shale, chert and well-bedded calci-turbidite.... The matrix varies in composition from black shale to carbonate mudstone and quartzose siltstone. The upper contacts are mostly sharp and overlain by interbedded mudstone, dark brown mudstone, laminated mudstone and occasionally fine-grained sandstone. Rhymes bloodstone
随便看	pulse point pulse position modulation pulse pressure pulse radar pulse radiolysis pulse repeater pulse-taker pulse-taking pulse-time-modulated pulse time modulation pulse tracing pulse watch pulse wave pulse width pulse width modulation pulse-wise pulsific pulsimeter pulsion thereat there but for the grace of God (go I) thereby thereby hangs a tale the Reconstruction the red planet

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