groove mark A linear groove, cut in a muddy substrate by the dragging of an object through the sediment by flowing water. The orientation of the groove will be parallel to the current direction. Subsequent infilling of the groove by sediment will result in a groove cast being preserved on the base of the overlying bed.

groove mark A linear groove, cut in a muddy substrate by the dragging of an object through the sediment by flowing water, the orientation of which is parallel to the direction of the current. Subsequent infilling of the groove by sediment results in a groove cast being preserved on the base of the overlying bed.