antiformal syncline背形向斜;背斜型向斜
carinate syncline脊状向斜
closed syncline闭合向斜
pitching syncline伏向斜
Kaiping syncline开平向斜
inclined syncline斜歪向斜
entrant syncline伸入向斜
Renheping syncline仁和坪向斜
N（名词） a downward fold of stratified rock in which the strata slope towards a vertical axis 向斜 → compare anticline