Table 3.

Summary of grain size (maximum breadth) data from archaeological pearl millet across western and Saharan Africa. Desiccated grins (Qasr Ibrim) and estimates from pottery impression spikelets corrected by −10% to improve comparability to charred grains. In some cases measurements have been estimated from photographs in the original source

No	Site	Median age (-BC/ AD)	Breadth Ave	Stdev	Min	Max	n	Source
1	AZ22	−4500	0.803	0.082	0.692	1.077	28	This study
2	MT25	−3500	0.870	0.158	0.630	1.080	6	This study
3	Karkarichinkat Nord (KNO5)	−2500	1.110			1.110	1	Manning and Fuller (2014)
4	MK36	−2200	1.046	0.208	0.931	1.526	9	This study
5	Winde Koroji	−2025	0.770		0.770		1	MacDonald et al. (2017)
5	Winde Koroji	−2025	0.825			0.825	1	MacDonald et al. (2017)
6	Er Negf (EN07)	−1800	1.530			1.530	1	Manning and Fuller (2014)
7	Djiganyai	−1795	1.54			1.540	1	Fuller et al. (2007)
7	Djiganyai	−1795	1.181		1.181		1	Fuller et al. (2007)
8	Ounjougou	−1725	1.371			1.371	1	Ozainne et al. (2009)
8	Ounjougou	−1725	1.200				1	Ozainne et al. (2009)
9	Birimi	−1700	0.900	0.220	0.600	1.900	376	D'Andrea et al. (2001)
10	Boase: B5C	−1665	2.100			2.100	1	D'Andrea et al. (2006)
11	Bosumpra cave	−1500	1.400				1	Oas et al. (2015)
12	Ti-n-Akof	−1450	1.300	0.330	1.000	2.100	18	Kahlheber (2004)
13	Gajiganna	−1150	1.530	0.374	0.800	2.500	30	Kahlheber (2004)
14	Kursakata (weighted ave)	−800	1.142	0.346	0.500	2.000	41	Zach and Klee (2003)
15	Walalde	−675	1.500				1	Murray and Déme (2014)
16	Oued Bou Khzama	−500	1.081	0.457	0.758	1.404	3	After Fuller et al. (2007)
17	Bwambe-Sommet	−425	1.500	0.346	0.900	2.100	15	Kahlheber et al. (2009)
18	Oursi West	−300	1.200	0.252	0.600	2.200	800	Kahlheber (2004)
19	Abang Minkoo	−260	1.500	0.214	1.100	1.900	18	Kahlheber et al. (2009)
20	Old Jarma	−100	1.062	0.278	0.500	1.600	21	Pelling (2007); Fuller et al. (2007)
18	Oursi West	200	1.200	0.270	0.600	2.200	400	Kahlheber (2004)
20	Old Jarma	300	1.625	0.250	1.500	2.000	4	Pelling (2007); Fuller et al. (2007)
21	Cubalel	400	1.562	0.340	0.951	2.360	35	New metrics; cf. Murray et al. (2007)
22	Qasr Ibrim	450	1.620	0.185	1.320	1.890	10	Steele and Bunting (1982)
23	Arondo	500	1.280				1	Zach and Klee (2003)
20	Old Jarma	600	1.082	0.176	0.600	1.800	254	Pelling (2007); Fuller et al. (2007)
24	Tongo Maare Diabal (1–2)	625	1.256	0.166	0.938	1.688	41	Champion (2019)
25	Oursi North	750	1.300	0.256	0.700	2.600	60	Kahlheber (2004)
24	Tongo Maare Diabal (3)	825	1.383	0.292	0.750	1.875	25	Champion (2019)
25	Oursi North	1000	1.200	0.410	0.700	2.600	262	Kahlheber (2004)
24	Tongo Maare Diabal (4–5)	1025	1.304	0.333	0.813	1.875	30	Champion (2019)
26	Saouga	1050	1.400	0.300	0.600	2.300	90	Kahlheber (2004)
27	Toguere Doupwil	1325	1.500	0.385	0.600	2.500	143	Bedaux et al. (1978)
11	Bosumpra Cave	1500	1.700	0.646	0.600	4.000	5	Oas et al. (2015)