| Geologically the axes from the New Guinea Highlands comprise thermally metamorphosed basalt, chert and greywacke depending on quarry source. |
| The Southern Highland Group, consisting of greywacke, shale, limestone and volcanic rock, forms the top of the Dalradian succession. |
| Ghanem et al. referred to the Hammamat Group as molasse-type sediments that consist of polymictic conglomerate, arkose, greywacke, siltstone and minor mudstone. |
| This comprises large olistoliths of greywacke sandstone, with interbedded mudstone and siltstone. |
| The builders used greywacke from the Rangitata River and limestone brought from Mount Somers and shaped the rocks by hand. |
| Some varieties include feldspathic greywacke, which is rich in feldspar, and lithic greywacke, which is rich in tiny rock fragments. |
