Two remarkable geological features present themselves in this little valley: one, the occurrence of the Upper Coal Measures of Bewdley, together with the well-known Spirorbis Limestone; the other, that of the Bone-bed, succeeded by the no less interesting Passage-beds, forming connecting links between the Old Red, Sandstone and Upper Ludlow Limestone. The order in which these occur, taking both banks of the brook, appears to be this.