Table 11. Major and trace element composition of volcanic ash layers from Site 1001.
Notes: Shipboard XRF data. LOI = loss on ignition.

Major oxide (wt%)
Core, section, interval (cm)	Depth (mbsf)	SiO2	TiO2	Al2O3	Fe2O3	MnO	MgO	CaO	Na2O	K2O	P2O5	Total	LOI

165-1001A-
24R-1, 14-16	208.54	62.8	0.71	16.5	7.37	0.01	6.75	3.17	2.08	1.12	0.02	100.5	10.86
50R-3, 103-106	462.43	63.1	0.52	18.1	6.82	0.03	6.77	3.20	1.80	0.83	0.07	101.2	13.73
50R-5, 78-81	465.18	58.8	1.25	15.9	9.66	0.05	6.91	4.19	1.82	1.08	0.39	100.0	11.22

165-1001B-
31R-3, 37-39	474.03	53.8	1.12	13.8	13.40	0.11	8.40	6.34	2.15	1.19	0.11	100.4	15.28

Trace element (ppm)
Core, section, interval (cm)	Depth (mbsf)	Nb	Zr	Y	Sr	Rb	Zn	Cu 	Ni	Cr	V	Ba	

165-1001A-									
50R-3, 103-106	462.53	34.1	498	46	315	7	75	20	26	5	29	65
50R-5, 78-81	465.18	25.6	366	66	332	12	105	31	62	3	90	67

165-1001B-
31R-5, 37-39	474.03	4.0	83	15	293	13	142	132	74	52	266	91