Defining Characteristics: This type was usually made on a expended core or large chunk. Any somewhat flat surface even with cortex would suffice for a ventral surface.
|
Total Number |
62 |
|
Weight(oz) |
8.3 |
|
Circumference(cm) |
22.3 |
|
Thickness(cm) |
39.0 |
|
Min. Angle(average) |
69.9 |
|
Max. Angle(average) |
87.3 |
Notes: The quality of the material did not seem to matter all of the time. Many examples of material were extremely poor for it’s flaking qualities. One well used example was fire cracked, even though this could have happened after it was discarded. Overall, this type is the heaviest. The Ridge-Backed type(discussed later) on average weighed more but was a sample of only five, it most likely would lower if more samples were included. This type also was the thickest on average.
Description of Figures:
a1: A large example of a Core/Chunk Scraper-Plane. Made of good quality quartzite. Notice two flat areas used as ventral surface. Most of the smoothing occurred on the larger side.
a2: Examples
of Core/Chunk Scraper-Planes. Top
left; Cobble of quartzite with cortex remaining on both sides.
Top right: Quartzite core with multiple working edges.
Bottom: Side view of quartzite chunk showing worked edge.
a3: Close-up of Core/Chunk Scraper-Plane, showing retouched edges. Average number of edges used per plane: 2.4
|
Total |
Percent |
|
|
Convex |
50 |
33% |
|
Concave |
39 |
26% |
|
Straight |
62 |
41% |
Number of working surfaces totaled for type and percentages
.