Since projectile points as a general class have proved to be the best criteria for establishing the stratigraphic differences whereby Topanga Phase I and Phase II may be distinguished, and because projectile points, to some measure, provide useful comparative data, it seems advisable to illustrate all the complete and near-complete specimens collected during both seasons. With additional information some modification has been made over last seasons presentation. Here are included two groups of projectile points, each of which is associated with a definite phase of the Topanga Culture. Phase I is characterized by large blades and large points, most of which are composed of a highly patinated basalt and have been manufactured through the percussion or rough pressure-flaking technique (pl. 21, _a-l_). Phase II is characterized by small projectile points of the "dart" class which in material range through slightly patinated basalt, glassy basalt, obsidian, chalcedony, and chert. All have been finished in a rough to medium pressure technique (pl. 22, _c-u_). Totally absent in either phase is the light, thin, finely pressure-flaked "arrow point" of the historic or protohistoric periods. Table 3 Frequency of Flaked Artifacts by Depth ========================================================================= | Depth (in in.) | |---------------------------------------------------------| Type |0-6 6-12 12-18 18-24 24-30 30-36 36-42 42-48 48-54 54-60|Total ---------|---------------------------------------------------------|----- Side | | scrapers|178 129 73 37 12 5 7 3 2 1 | 447 Straight-| | edge | | knives | 75 42 42 19 12 3 ... 2 1 ... | 196 Ovate | | scrapers| 9 10 5 8 1 1 1 ... ... ... | 35 End | | scrapers| 11 14 10 8 2 4 ... ... ... ... | 49 Snub-nose| | scrapers| 8 15 6 1 2 ... ... ... ... ... | 32 Flake | | scrapers| 25 20 14 8 2 1 3 ... ... ... | 73 Cobble | | scrapers| 2 1 3 ... 1 1 ... ... ... ... | 8 Concave | | scrapers| 3 3 2 1 ... ... ... ... ... ... | 9 Thumbnail| | scrapers| 1 ... ... ... ... ... ...