Table S3.

Trace metal geochemistry of euxinic sediments

Site	Al, wt%	Mo, ppm	U, ppm	V, ppm	Mo/Al, ×10−4	U/Al, ×10−4	V/Al, ×10−4	Reference
Black Sea Sta 6 (380 m)
Unit 1	4.07	69.7	13.1	116	16.6	3.23	28.1	(63)
Unit 2a	6.21	152	17.2	136	24.5	2.77	21.9	(63)
Black Sea Sta 7 (1,176 m)
Unit 1	3.29	39.4	13.1	102	12.0	3.99	30.9	(63)
Unit 2a	4.86	108	17.9	124	22.3	3.67	48.2	(63)
Cariaco Basin (Holocene average)	4.90	75.0	—	149	15.3	—	30.3	(23)
Saanich Inlet (top 10 m)	5.24	44.9	—	141	8.6	—	26.9	(64)
Crustal average	8.15	1.1	2.7	97	0.135	0.331	11.9	(61)