1. In profile, the syncline is asymmetrical and called inclined fold.

2. The compact fold structure area , anticline and. syncline in North Guizhou are often in opposite arrangement.

3. Anticline and syncline, geometrical elements of fold, description and recognition of fold in the field.

4. In addition to these two types of folds, however, we must mention another one, which is not easily classifiable as either anticline or syncline and is referred to as a monocline .

5. This fold is an anticline and that one is a syncline. a fold has two limbs.

6. The gravity slide structures occurred in both limbs of coal measure synclines will give rise to complicated structural image in the axial part of the syncline.

7. This zone has little folds includes huangshan anticline, laiwu syncline and fangzhen syncline.

8. CBM sealed condition is bad under neutral plane at axial part where shows tensile stress in syncline structure.