Table 1 Results of the heating proxy analysis of silcrete from Hoedjiespunt.

From: When was silcrete heat treatment invented in South Africa?

Silcrete from HDP, total of analysed artefacts: 121

Count

Percent total

Percent det.

Percent HT

Indeterminate artefacts

12

9.9%

  

Not-heated artefacts

30

24.8%

27.5%

 

Artefacts with post-heating removal scars

79

65.3%

72.5%

 

Of which:

 Diagnostic artefacts (pre- and post-HT scars)

24

  

30.4%

 Artefacts with HINC-fracture surfaces

7

  

8.9%

 Artefacts with black tempering residue

0

  

0%

  1. Percentages under ‘Percent total’ refer to the total of analysed artefacts, percentages under ‘Percent det.’ refer to all determinable artefacts in the assemblage but exclude indeterminate artefacts. Percentages under ‘Percent HT’ refer to the number of heat-treated artefacts in the assemblage. Percentages in the section ‘of which:’ are calculated to the base of all artefacts with post-heating removal scars (79). Note that percentages below ‘of which:’ are not exclusive, i.e., there are diagnostic artefacts that also contain HINC fractures or tempering residue.
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