Table 2.

Comparison of other MSA middens close to YFT1 in age, and their accumulation characteristics

Site	Layers or midden thickness (m)	Age range (ka, 95% CI)	Accumulation duration (ka)	Accumulation rate (m/ka)
YFT1	Entire midden (3.8 m)	119.9 to 113.1	2.3 to 6.8 (mean and 95% CI, respectively)	1.7 to 0.6 (95% CI and mean, respectively)
BBC	0.24 m (unit M2 upper, for layer CFB/CFC) and 0.86m for unit M3 (for layer CI)	76 ± 6 to 74 ± 6 (unit M2 upper); 98 ± 10 to 82 ± 8 (unit M3)	2 ± 4.2 and 16 ± 6.4, respectively	0.12 and 0.05, respectively (mean)
KRM	Entire midden (20 m)	∼101 to 66	65	0.3
PP13B	Upper roof spall and shelly brown sand (est. 0.4 m)	∼115 to 90	25	0.02