coal-accumulating period是什么意思

用法例句

The evolutionary processes of thedepression can be divided into four epochs: Early Jurassic to early Middle Jurassic, MiddleJurassic, Late Jurassic and Early Cretaceous, of which, Early Jurassic to early Middle Jurassicis an important coal-accumulating period.

其演化过程可分为早侏罗世-中侏罗世早期、中侏罗世、晚侏罗世和早白垩世4个阶段，旱侏罗世-中侏罗世早期为重要的聚煤期。

Syndepositional structure and coal accumulation in Tiefa basin;

铁法盆地同沉积构造与聚煤

Palaeo environments and coal accumulation of Early Jurassic Badaowan Formation in Turpan-Hami oil basin northwestern China;

吐哈盆地早侏罗世八道湾组古环境与聚煤作用分析

Study on coal accumulation under marine transgression events in the epicontinental basin of North China;

华北陆表海盆地海侵事件聚煤作用研究

Late Triassic sequence stratigraphy and coal accumulation in Baoding Basin of Sichuan Province;

四川宝鼎盆地晚三叠世层序地层与聚煤作用

Sequence stratigraphy and coal-forming laws in Pingzhuang basin of Inner Mongolia;

内蒙古平庄盆地层序地层与聚煤规律

Study on iate paleozoic coal-forming law in eastern henan;

豫东地区晚古生界聚煤规律研究

Four genetic types were divided; coal-accumulating patterns and controlling factors in the area were analyzed.

并且通过对西山窑组中段煤层厚度和地层厚度的分析,对该区的聚煤规律和控煤因素进行了研究。