Table 1 Typological, compositional, stratigraphic, and metric data for the Gorgora MSA material.

From: MIS 3 innovative behavior and highland occupation during a stable wet episode in the Lake Tana paleoclimate record, Ethiopia

 

L12

L11

L10

L9

L8

L7

L6

L5

L4

Points (%)

0

22.22

26.76

17.14

15.38

15.32

19.48

9.45

5.04

Backed pieces (%)

0

0

0

0

1.7

1.1

1.3

5.5

3.7

Scrapers (%)

0

0

5.6

3.6

3.4

0

1.3

0

0

Notched/dent (%)

25

5.5

2.8

2.8

7.7

1.8

2.6

1

3.7

Misc. retouched (%)

0

5.5

21

8.6

0.8

0

14.2

1.5

0

Retouched total

2

6

40

45

34

20

30

35

16

Flakes/blades (%)

12.5

5.5

21

10

13

11

31.2

5.5

13.3

Cores (%)

0

0

1.4

0.7

0

0

0

0

0.7

Ochre

0

0

1

4

1

0

5

1

1

Debitage (lost)

5

11

16

80

70

83

23

153

101

Total Debitage

6

12

31

94

83

91

47

164

119

Grand total

8

18

71

140

117

111

77

201

135

TCSA (Mean ± StDev)

n.a

126 ± 9

141 ± 12

139 ± 8

149 ± 11

154 ± 12

134 ± 14

135 ± 12

111 ± 19

TCSP (Mean ± StDev)

n.a

60.6 ± 2

59.8 ± 3

62 ± 1.8

59 ± 2.4

62.4 ± 2

57.5 ± 2.5

56.5 ± 2

56.7 ± 4.5

Retouched tool:Debitage

0.33

0.50

1.29

0.48

0.41

0.22

0.64

0.21

0.13

Points:total retouched tool

0.00

0.67

0.48

0.53

0.53

0.85

0.50

0.54

0.38

Accumulation Span (kyr)

16.5

16.5

16.5

16.5

16.5

16.5

16.5

16.5

16.5

Artifact vol. density (cm−3)

8

18

71

140

117

111

77

201

135

Artifact accum rate (cm−3/kyr−1)

0.48

1.09

4.30

8.48

7.09

6.73

4.67

12.18

8.18

Retouched tool:Artifact vol density

0.25

0.33

0.56

0.32

0.29

0.18

0.39

0.17

0.12

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