ID	Occurrence note	Country	Literary source	n, n*	Middle point		Starting point
ID	Occurrence note	Country	Literary source	n, n*	δ¹⁸O	δ¹³C	δ¹⁸O	δ¹³C	⁸⁷Sr/⁸⁶Sr
1	2	3	4	5	6	7	8	9	10
1	InOuzzal	Algeria	Ouzegane et al., 1988	7	9.38	−7.72	7.65	−7.72	˗
5	Bailundo	Angola	Pineau et al.,1973; Alberti et al., 1999	8*	9.60	−5.34	6.70	−6.50	˗
6	Monte Verde	Angola	Pineau et al.,1973; Alberti et al., 1999	15*	9.01	−4.53	5.30	−6.21	˗
10	Tchivira-Bonga	Angola	Alberti et al., 1999	7*	12.28	−3.74	9.42	−4.51	˗
15	Lupongola	Angola	Alberti et al., 1999	10*	9.23	−7.37	7.52	−7.88	˗
16	Matongo	Bourundi	Dolenek et al., 2015; Decree et al., 2015	13*	7.54	−5.21	6.53	−5.63	˗
19	Lueshe	Congo	Самойлов, 1984	2	7.90	−5.85	7.80	−5.85	˗
21	Wadi Tarr	Egypt	Shimron, 1975	3*	6.43	−7.67	5.20	−6.76	˗
29	Rangwa	Kenya	Suva et al., 1975	5*	15.10	−5.56	10.10	−4.22	0.7042
33	Homa Mountain	Kenya	Dennis and Schrag, 2010	8*	8.51	−3.36	7.70	−3.52	˗
34	Buru-siderite	Kenya	Onuonga, 1997	16	14.48	−3.94	12.61	−3.94	˗
39	Kangankunde	Malawi	Dennis and Schrag, 2010; Nelson, 1987; Broom-Fendley et al., 2017	9	8.49	−4.79	5.50	−4.79	0.7016
47	Chilwa Island	Malawi	Simonetti and Bell, 1994	16	11.48	−2.61	7.90	−2.61	0.7032
48	Tundulu	Malawi	Самойлов, 1984	2	12.35	−3.25	10.40	−3.25	˗
51	Songwe Hill	Malawi	Broom-Fendley et al., 2016	4*	11.13	−4.00	7.80	−3.40	˗
64	Tamazert	Morocco	Bouabdellah et al., 2010; Marks et al., 2009	42	8.60	−5.62	6.94	−5.62	0.7033
73	Xiluvo	Mozambique	Melluso et al., 2004	3*	9.63	−5.32	7.50	−5.10	0.7032
75	Swartbooisdrif	Namibia	Thompson et al., 2002	2	8.01	−7.37	7.90	−7.37
78	Okorusu	Namibia	Le Roex and Lanyon, 1998	2	8.80	−4.64	8.11	−4.64	0.7043
79	Ondurakorume	Namibia	Le Roex and Lanyon, 1998	2	8.80	−4.64	6.47	−4.64	0.7035
82	Lofdal	Namibia	Vistorina Nandigolo, 2013	3*	8.08	−5.13	6.43	−5.57	0.7027
89	Dicker Willem	Namibia	Reid and Cooper, 1992	2	8.00	−5.00	7.00	−5.00	˗
103	Phalaborwa	S. Africa	Suwa et al., 1975	4	9.05	−3.85	8.00	−3.85	0.7039
105	Spitskop-calcite	S. Africa	Harmer, 1999; Suwa et al., 1975	8*	14.14	−2.86	11.70	−2.80	0.7028
105	Spitskop-dolomite	S. Africa	Harmer, 1999; Suwa et al., 1975	7	16.72	−1.99	15.97	−1.99	˗
108	Nooltgedacht	S. Africa	Clarke, 1989	2	9.05	−4.30	8.20	−4.30	˗
109	Kruidfonten	S. Africa	Clarke, 1989	5*	13.32	−2.40	10.90	−3.14	˗
113	Premier Mine	S. Africa	Suwa et al., 1975	4*	11.93	−6.50	11.40	−6.84	˗
122	Zandkopsdrift	S. Africa	Ogungbuy et al., 2015	10	14.95	−5.77	13.20	−5.77	˗
126	Oldoinyo Lengai	Tanzania	Bell and Keller, 1995; Halama et al., 2007	9	7.47	−6.86	5.78	−6.86	0.7044