"Table 16.  Statistics for crust layer data 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%	22	19.6	3.28	19.6	12.2	25.5
Mn	22	17.1	5.69	17.2	6.10	25.2
Fe/Mn	22	1.3	.6	1.2	.6	2.7
Si	22	9.28	4.72	8.48	3.69	22.0
Na	22	1.80	.27	1.76	1.48	2.55
Al	22	1.80	1.03	1.60	.37	4.32
K	22	.72	.20	.73	.45	1.24
Mg	22	1.09	.21	1.03	.67	1.50
Ca	22	1.85	.29	1.80	1.23	2.44
Ti	22	.54	.13	.55	.25	.79
P	22	.35	.07	.33	.23	.48
H2O+	22	9.99	1.91	9.56	7.10	14.0
H2O-	22	19.9	5.08	21.5	8.00	25.8
CO2	22	.43	.31	.37	.21	1.69
						
As  ppm	22	255	54	256	144	346
Ba	22	"2,344"	"1,320"	"2,096"	"1,042"	"6,598"
Cd	22	3.4	3.5	2.1	.41	13
Ce	22	"1,012"	272	"1,042"	427	"1,455"
Co	22	"2,655"	"1,072"	"2,673"	998	"4,717"
Cr	22	16	9.6	13	3.7	44
Cu	22	901	607	788	177	"2,689"
Mo	22	397	244	422	57	916
Ni	22	"3,283"	"2,197"	"2,878"	510	"9,056"
Pb	22	"1,184"	403	"1,098"	556	"1,887"
Sr	22	"1,309"	303	"1,295"	754	"1,781"
V	22	602	151	583	322	891
Y	22	171	50.1	162	85	254
Zn	22	715	213	729	299	"1,190"
						
Pd  ppb	15	4.8	2.1	4.3	1.9	9.3
Pt	15	77	27	79	28	124
Rh	15	6.1	1.2	6.2	3.1	8.1
						
La  ppm	7	345	105	344	235	497
Ce	7	"1,076"	322	"1,136"	564	"1,455"
Pr	7	84.5	32.5	88.1	47.0	127
Nd	7	338	129	351	191	513
Sm	7	77.3	30.8	80.6	41.8	119
Eu	7	18.2	7.33	18.7	9.91	28.7
Gd	7	72.1	27.2	73.3	42.7	111
Tb	7	11.5	4.49	11.6	6.78	18.1
Dy	7	66.1	25.1	64.6	41.8	105
Ho	7	11.7	4.09	10.9	7.48	18.6
Er	7	31.0	10.9	28.6	19.2	50.2
Tm	7	4.59	1.59	4.15	2.85	7.40
Yb	7	28.8	9.29	26.5	18.5	45.6
Lu	7	3.83	1.08	3.50	2.49	5.72