| Asymmetrical folds and axial planar quartz veins, isoclinal and rootless folds and boudinage of chert layers are common. |
| The vast majority of chert tools found at Hopewell sites are not made from blades, but from reduction flakes derived from multidirectional cores. |
| The fine preservation is due to the silicification of chert in which it was embedded. |
| Subsequently the massive sulfide deposit and surrounding metalliferous sediment apron were covered by oceanic radiolarian chert sediments. |
| The sedimentary lenses are composed of limestone, sandstone, siltstone, mudstone, shale, chert and well-bedded calci-turbidite. |
| Larger village sites have yielded a much wider range of chert tools than have smaller encampments. |
