Worn surface breakage, worn to roundness 0.4 or greater. No indication of breakage. Boulders from category 3 have covered the longer distance of transportation because of their rounded shape. Also, because they would break and would not appear in the category of boulders, due to their smaller size. Table 5 illustrates that basalt and granite P indicate long distance of transportation.
Discs are more abundant than rods.
In Drake's study, the blades disappear within 9mi from the rock source, rods and discs extended to 14mi, and spheres persist to 21 mi. They are mainly spheres. Blades do not exist in the population of this rock. The basalt came from the second most distant source. A large percentage of these rocks have a roundness above 0.5, in general there is no indication of fresh breakage, mostly they are spheres.