Table 3.

Results of attempts to replicate ages of proposed YDB layers for sites in Fig. 1, group 3a

Site	Age of YDB originally reported	Predicted age of proposed YDB layer, unweighted	Age difference (column 3 minus column 2)	Predicted age of proposed YDB layer, weighted	Age difference (column 5 minus column 2)
Abu Hureyra*	12,900	13,082	182	13,044	144
		12,658	−242	12,763	−137
Arlington Canyon	12,800	13,106	306	13,108	308
Barber Creek	12,800	12,100	−700	12,100	−700
Blackville	12,800	12,960	160	12,960	160
Blackwater Draw	12,900	12,860	−40	12,866	−34
Kimbel Bay	12,800	18,106	5,306	12,094	−706
Lake Cuitzeo	12,900	19,725	6,825	15,916	3,016
Melrose†	12,900	12,300	−600	–	–
Murray Springs	12,900	12,847	−53	12,809	−91
Talega	12,800	13,030	230	13,030	230
Topper	12,800	11,773	−1,027	11,098	−1,702

^*Ages given for Abu Hureyra are for the reported 284.29 m and 284.70 m depths of the supposed YDB layer.

^†A weighted model is not possible for Melrose because one of the data points is the ground surface, not a date with an error term.