Similitudes y diferencias entre profesores de una misma categoría.

Just as stated earlier, the tool types categorized as “other pieces” here includes cores, grindstones and hammerstones. Just like other tool types discusses above, this class is made up of a number of raw materials. Cores are the major sub class of this class. Different types of cores are identified in both the two sites. Some of these core classes include casual cores, single platform cores, double platform cores, multiplatform cores among others.

Obsidian cores are more predominant in GxJj 12 than in FxJj 12. There is only one pieces of casual core (the only obsidian piece) in the entire FxJj 12 collection which account for 14.3% of all the cores analyzed from the site as shown on figure 5.14. There is however no casual core of obsidian from GxJi 4.

0 10 20 30 40 50 60 70 % f re q u e n cy c or e s Cores

% frequency of quartz cores in the two sites

GxJi 4 Fxjj 12

Figure 5.14 % frequency of obsidian cores Figure 5.15 % frequency of chert cores in the two sites in the two sites.

Single platform cores, double platform cores, multiplatform, core fragments and flake cores of obsidian in GxJi 4 are at a frequency of 27.7%, 50%, 47.5%, 20% and 15.5%

respectively. A ANOVAs table for the frequency of obsidian cores in the two sites can be summed up as follows: taking H0: percentage usage of obsidian on cores in the two sites is significantly similar and H1: percentage usage of obsidian on cores in the two sites is significantly different. With an alpha of 0.05, the p-value 0.2549>0.05, hence reject the H0: and conclude that percentage usage of obsidian on cores in the two sites is significantly different (see appendix 11).

Chert is also largely a raw material in the cores. Quite a huge number of cores have been made from chert in both sites. All the single platform cores from FxJj 12 are made from chert while only 58.6 % of those from GxJi 4 were made from chert as indicated on figure 5.15. The percentage frequency of the multiplatform cores from FxJj 12 is higher than that of GxJi 4 with 50% and 44.6% respectively. There is only one core fragment from FxJj 12 and it of chert while GxJi 4 has none. More information on this can be seen figure 5.15 above. 0 10 20 30 40 50 60 % f re q u e n cy o f o b si d ia n Cores

% frequency of obsidian cores in the two sites GxJi 4 Fxjj 12 0 20 40 60 80 100 120 % f re que nc y of c he rt Cores

% frequency of chert cores in the two sites GxJi 4 FxJj 12

ANOVAs table generated for the frequency of chert in cores can be summed as: Taking H0: percentage frequency of chert on cores is significantly similar and H1: percentage

frequency of chert on cores is significantly different. With an alpha of 0.05, the p-value 0.3415>0.05, hence reject the H0: and conclude that percentage frequency of chert cores in two sites is significantly different (see appendix 13).

Quartz cores are also numerous from the two sites there are no casual cores made on quartz from GxJi 4 while from FxJj 12 they make up to 28.6% of all casual core (see figure 5.13).

No single platform cores made on quartz were recovered from FxJj 12 while 13.3% of those at GxJi 4 were quartz. Core fragments and flake cores made from quartz were only

recovered from GxJi 4 as indicated on the table 5.2. Double platform cores and

multiplatform cores have a higher percentage frequency in FxJj 12 at 10.3% and 13.3% respectively as compared to those at GxJi 4 at 3.4% and 7.9% respectively. There are however no discoidal cores made on quartz from the two sites.

ANOVAs for percentage frequency of quartz cores can be summarized as: Taking H0:

Percentage usage of quartz on cores is significantly similar and H1: percentage frequency of quartz on cores is significantly different. With an alpha of 0.05, the p-value 0.2925>0.05, hence reject the H0: and conclude that the percentage frequency of quartz on cores in the two sites is significantly different (see appendix 14).

Basalt is another important raw material although not as widely used in cores in GxJi 4 as in FxJj 12. There is only 39.4% of core flakes from GxJi 4 made from basalt and none from FxJj 12 as indicated on table 5.2. Both sites have no recorded casual cores from this

raw material but, 2.6% of double platform cores, 36.7% of single platform cores and 100% discoidal cores exist from FxJj 12.

ANOVAs of the use of basalt cores can be summarized as: taking H0: percentage usage of basalt on cores is significantly similar and H1: percentage usage of basalt on cores is

significantly different. With an alpha of 0.05, the p-value 0.6166>0.05, hence reject the H0: and conclude that percentage usage of basalt on cores in the sites is significantly different. There is no recorded sandstone and clay stone core from the two sites. All grindstones and hammerstones from both sites were all made on quartz.