局限海盆 meaning in English

restricted sea basin

Now it is thought that two formations were formed in the same period from early cambrian to early ordovician and were deposited in different parts of sea basin on the northern edge of the north china platform , based on the acritarchs contained in these formations
通过对以上两个组中疑源类化石进行研究，认为阿牙登组应从白云鄂博群中分出，与腮林忽洞组一同划归早寒武世至早奥陶世的地层中，阿牙登组与腮林忽洞组为同一时期不同局限海盆的沉积，是早古生代华北地台最北部边缘的沉积产物。