• Approximately 3 m of stratigraphic section isexposed in the borrow pit, but the exposure is nolonger fresh. The exposed beds consists of, fromthe base, approximately 0.5 m of massive,carbonate-cemented quartz sandstone,approximately 0.5 m of fossiliferous calcareousconglomerate, and approximately 2 m of highlyweathered calcareous sandstone in which nofossils or other primary depositional features areevident. A veneer of Quaternary red aeolian sandcaps the exposure (Fig. 2A).The basal sandstone unit is composed ofpoorly-sorted, angular to well-rounded, medium-to coarse-grained quartz and lithic quartz,cemented by calcium carbonate (Fig. 3D). Manyquartz grains have dark, micrite rims. No bioclastsor sedimentary structures were observed in it.The little that could be seen of the contactof the sandstone with the overlyingconglomerate was distinct though irregular. Theconglomerate bed is characterised by anabundance of fragmented and mostlyindeterminate bone mixed with very well-rounded, commonly polished, pebbles of highlysilicified, fine to gravelly sandstone (Fig. 2B).The sand fraction of the conglomeratecompositionally and texturally resembles that ofthe underlying unit (e.g. Fig. 3A). Calcite cementslithify the bed.