| Study | Absolute Density (g/cm3) |
| Krumbein and Sloss [40] | 2.65 |
| Folk [41] [42] | 2.65 |
| Bluck [13] | 2.65 |
| Selley [14] | 2.65 |
| Konhauser et al. [15] | 2.55 |
| Platl and Legros [16] | 2.51 |