The genesis of the sutures has not been completely resolved, but it tends to be thought that their formation is related to the diagenetic-post-stage pressure solution. ; Specifically, the formation of sutures is due to the selective dissolution of adjacent rock formations under pressure during the shoaling-epigenetic stage. Under directional stress conditions, where the rock components have different stress solubility, one component will dissolve faster than the other. For example, the calcareous biogenic bone debris in carbonate rocks is less soluble than the crystalline matrix under stress conditions. Therefore, when the adjacent rock and stone components dissolve by stress, the more soluble parts are dissolved away, while the less soluble parts are left and extended into the space generated by the dissolution accordingly, thus forming Undulating toothed dissolving seam. The dissolved material is moved along this dissolution joint in the state of solution, or re-precipitated as cement in nearby rock formations. The insoluble residue remains in this gap.
Causes of sutures