The Permian in Huainan coalfield is a set of deltaic coastaldeposition.
淮南煤田二叠系是以三角洲—滨岸平原相为主的沉积。
2
Slightly higher than the territory lying North-East, south-west gradually lower deposition for coastal plains, a coastline of 23.5 kilometers.
境内地势东北略高，西南渐低，为海滨淤积平原，海岸线长23.5公里。
3
Lagoon is the coastal landscape developed by the deposition mainly since Holocene transgression, and the stratigraphic of which contains a wealth of paleoenvironment evolution information.