A trip to the hills west of Copley revealed a fascinating array of sedimentary rock formations. Within an approximate 100 metre square area, extensive layering was apparent. Dolomite layers were dominant to the south, typical of the local magnesite bearing formation. Within these layers were granular conglomerates with silicified seams.
Further along to the north were finely banded dolomites.
Evidence of glacial deposits was seen in tillite, pebbly layers and a course sandy / silty matrix.
This formation contained a dazzling array of coloured siltstone with seams of iron oxide and concretions.
The hillside was scattered with claystone and variously coloured siltstones, sandstones, chert nodules and iron oxides, with a concentrated area of sculptural iron oxide concretions.
