| Shale adjacent to ironstone is ferruginized, strongly foliated and complexly folded where it contains chert layers. |
| The sedimentary lenses are composed of limestone, sandstone, siltstone, mudstone, shale, chert and well-bedded calci-turbidite. |
| Lead ore, pig lead, timber and chert stones from Flintshire were the other significant cargoes. |
| Hopewellian chert tool industries consist of three discrete manufacturing trajectories, resulting in tools made on cores, flakes, and blades. |
| Geologically the axes from the New Guinea Highlands comprise thermally metamorphosed basalt, chert and greywacke depending on quarry source. |
| The vast majority of chert tools found at Hopewell sites are not made from blades, but from reduction flakes derived from multidirectional cores. |
