The exposure at the Meishan D section contains only the uppermost part of the Longtan Formation. These beds include earthy yellow, calcareous siltstone and mudstone with horizontal beds of increasing thickness that contain ammonoids and brachiopods. This bed appears to be conformable with the overlying Baoqing Member of the Changxing Limestone.
The lowest bed (Bed 2) of the Changxing Limestone at section D, which is represented by dark grey, thick-bedded silty wackestone, appears to form the upper part of a cycle or parasequence. Bed 3 contains greyish black calcareous mudstone and thin-bedded argillaceous mudstone that may represent the flooding unit of a second parasequence in the section. Beds 4 and 5 include thin to medium bedded wackestone and represent the regressive portion of this second parasequence.