1. During the Upper Paleozoic in Huabei there were 3 main times of sea level eustacy which caused different deposits in research area.
华北晚古生代经历了3次大的海平面升降旋回，不同海侵事件在研究区内留下了不同的沉积纪录。
youdao
2. Three main factors including basement subsidence, sediment supply and eustacy affect the accommodation space, structure dominated in the evolution of both the accommodation and sedimentary facies.
基底沉降、沉积物供给和湖平面升降是影响断陷湖盆可容空间发育的主要因素，其中构造活动的影响最为明显。
youdao
3. Three main factors including basement subsidence, sediment supply and eustacy affect the accommodation space, structure dominated in the evolution of both the accommodation and sedimentary facies.
