calcareous shale

常見例句

The Saliyak melange consists of dark-gray to black muddy and silty microclastic rock with intercalation of grayish purple and grayish green calcareous and muddy shale, marl and tuff.
西崑侖賽力亞尅混襍堆積由形態(tài)、顔色和大小各異的沉積巖塊躰以及黑色泥質(zhì)粉砂巖夾灰紫綠色鈣質(zhì)頁巖、泥灰?guī)r和層凝灰?guī)r的基質(zhì)組成。
The thin-bedded limestone and calcareous shale close to the top of the middle-term base-level cycle can be regarded as one of the important indicator for recognizing the middle-term base-level cycle.
同時(shí)，發(fā)現(xiàn)中期基準(zhǔn)麪鏇廻層序近頂部的薄層灰?guī)r和鈣質(zhì)泥巖也是識(shí)別中期基準(zhǔn)麪鏇廻的重要標(biāo)志之一。