middle permian meaning in English
中二迭世
Examples
- Stratigraphic sequence of the early - middle permian reef in western east kunlun mountains
中二叠世生物礁相地层层序 - Tiaohu period in middle permian was the first period of broad lake - basin . the lake covered almost the whole basin
中二叠世芦草沟期是盆地第一个广盆发育期，湖盆面积大，覆盖范围广。 - Besides the aridity climate , the reason caused the high salinity of the lake water possibly was the frequent transgression in the early and middle permian
造成湖泊水盐度较高的原因，除了干旱的气候外，认为主要是由于早、中二叠世三塘湖地区频繁的海侵作用造成的。 - One to three karst cycles may be recognized mostly at the top of the upper permian strata , top of the middle permian maokouan strata and top of the carboniferous strata and subordinately at the top of the devonian strata
这些古岩溶作用主要存在于上二叠统顶部、中二叠统茅口组顶部和石炭系顶部，其次是泥盆系的顶部。 - Lake delta depositional systems appear from lower permian shanxi to middle permian xiashihezi phase , braided river delta in shanxi phase with delta plain subfacies sedimentary deposit , and so early xiashihezi , meandered river delta plain subfacies in later xiashihezi group
( 2 )下二叠统山西组中二叠统下石盒子组为湖泊三角洲沉积体系，其中山西期为网( braided )状河湖泊三角洲，以三角洲平原亚相沉积为主，下石盒子组早期也为网状河三角洲、晚期为曲流河三角洲平原沉积。