| Contra Costa |
| 2500-1500 B.P. |
| Outline Representative of Shape and Size | Point Characteristics and Information |
| Size | Medium to Large |
| Shape | Triangular |
| Notch Type | Side Notched |
| Shoulder | Straight to slight barb |
| Shoulder Edge | Straight |
| Stem | Expanded |
| Base | Convex |
| Comments |
| Double Notched |
| May be serrated |
| Rare |
| Distribution |
