Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| Retouched blade | Stage A | Stage B | Stage C | Stage D | |
| BF | 0 | 3 | 13 | 0 | 16 |
| RF | 0 | 4 | 16 | 0 | 20 |
| Q | 0 | 0 | 0 | 0 | 0 |
| 0 | 7 | 29 | 0 | 36 | |
| Retouched flakes | Stage A | Stage B | Stage C | Stage D | |
| BF | 4 | 14 | 14 | 12 | 44 |
| RF | 8 | 10 | 5 | 4 | 27 |
| Q | 8 | 5 | 8 | 5 | 26 |
| 20 | 29 | 27 | 21 | 97 |
Frequencies of retouched blanks and their reduction stage attribution, from Shizitan 29, layer 7 Top according to raw materials: (BF) Black flint; (RF) River flint; (Q) quartz/quartzite; (O) other materials.
