"Table 15. Statistics for 60 bulk crusts and nodules from Tables 12 and 13.
[Std. Dev., Standard deviation; wt%, weight percent ppb, parts per billion; ppm, parts per million]"						
	Count	Mean	Std. Dev.	Median	Minimum	Maximum
Fe wt.%	60	19.4	3.96	19.7	8.42	33.7
Mn	60	15.9	5.39	16.6	3.15	26.1
Fe/Mn	60	1.5	1.4	1.2	.4	11
Si	60	10.2	4.20	9.75	2.70	25.0
Na	60	1.82	.20	1.78	1.35	2.66
Al	60	1.94	.89	1.89	.52	4.89
K	60	.79	.25	.73	.42	1.61
Mg	60	1.12	.29	1.04	.73	2.05
Ca	60	1.79	.37	1.87	.69	2.40
Ti	60	.56	.19	.54	.21	1.04
P	60	.38	.13	.37	.14	.89
H2O+	60	9.38	2.01	9.19	5.00	16.8
H2O-	60	18.3	4.80	18.4	8.00	25.6
CO2	60	.38	.15	.38	.12	.82
						
As  ppm	60	254	91	250	65	582
Ba	60	"3,549"	"8,768"	"1,666"	741	"65,651"
Cd	60	3.0	3.0	1.9	.12	13
Ce	60	"1,091"	408	"1,085"	296	"1,998"
Co	60	"2,891"	"1,623"	"2,771"	535	"10,458"
Cr	60	30	30	21	5.8	180
Cu	60	702	570	574	45	"3,825"
Mo	60	331	188	329	5.9	740
Ni	60	"3,017"	"1,949"	"2,489"	449	"8,565"
Pb	60	"1,254"	500	"1,268"	391	"2,847"
Sr	60	"1,281"	491	"1,283"	522	"4,220"
V	60	571	156	580	211	"1,024"
Y	60	162	53	169	54	254
Zn	60	634	178	593	261	"1,098"
						
Pd  ppb	15	4.1	1.3	4.1	2.0	7.2
Pt	15	69	30	72	37	141
Rh	15	6.0	1.4	6.3	3.0	7.8
						
La  ppm	13	343	91.1	378	168	472
Ce	13	"1,161"	281	"1,199"	686	"1,622"
Pr	12	77.3	26.0	85.2	36.5	109
Nd	13	314	98.2	341	150	440
Sm	12	68.9	23.8	74.8	33.8	97.7
Eu	13	16.8	5.52	17.9	8.42	23.4
Gd	12	66.0	20.8	70.5	33.9	93.7
Tb	12	10.7	3.36	11.4	5.49	15.1
Dy	12	62.4	18.2	67.4	34.2	87.3
Ho	13	12.1	3.23	13.2	6.65	17.0
Er	12	31.9	7.92	35.0	18.5	44.7
Tm	12	4.79	1.12	5.28	2.91	6.60
Yb	13	31.4	7.75	33.3	18.6	44.0
Lu	12	4.11	.89	4.35	2.61	5.71