煤线 meaning in English
coal streak
layer of coal
Examples
- From the beginning of sq9 ' s development , the sedimentary environment turn to be lake basin bog . with water becoming shallow , coal seam appeared in lowstand system tract , delta plain and delta front are the main sedimentary bodies in highstand system tract
从层序9开始，水体开始变浅，向湖沼环境过渡，低水位体系域和水进体系域出现了煤线，高水位体系域以三角洲平原及三角洲前缘沉积为主。