泥盆纪时期 meaning in Chinese

devonian period million years ago

The oldest exposed rocks are devonian fluvial sediments that were deposited 400 million years ago . the region was subsequently inundated by a shallow sea
年代最久远的岩石是四亿年前泥盆纪时期由河流冲积形成的沉积岩。
These geomorphic units of paleogeography constitute the basic model of paleocontinent , littoral - neritic sea and carbonate plateform at that stage , and this depositional model is similar to the pattern of the east china continent and ocean , which is the result of evolution during the past long geologic age
这些古地理地貌单元构成了湖北省泥盆纪时期古陆滨浅海和碳酸盐岩台地的基本沉积模式，这种沉积模式与现今中国东海大陆、海洋格局基本一致，亦是经过了漫长地质历史时期演化，而形成现今这种格局的。