Stidolph (1977) assigned these outcrops to the lower unit of the Shamvaian Group which consists of volcaniclastic sediments and pyroclastic rocks devoid of granitic clasts. These rocks form an extensive belt stretching across much of the south-eastern limb of the Shamva Belt.

Mixtures of sedimentary and pyroclastic deposits can be seen over scattered outcrops at this locality, indicating reworking of fine pyroclastic material and agglomerates. Some unusual textures of debateable origin are present.