"Table 13. Rare-earth element concentration (in ppm) of Fe-Mn crust and nodule samples from six seamounts, normalized to 0% H2O-.
[Rare earth element concentrations determined by inductively couple plasma mass spectrometry
(ICPMS); -- means not analyzed.  Ce anomaly calculated from chondrite-normalized values:  
Ce* =2Ce/(La+Pr).  Thickness of crust intervals measured in millimeters;  L, crust layer; B, bulk
crust;  BN, bulk nodule; ·REE, sum of the rare-earth elements.]"								
	San Marcos Seamount				Adam Seamount			
	D5-1A	D5-1B	D5-1C	D6-10	D7-8	D8-2A	D8-3A	D8-3B
	B(0-25)	L(0-15)	L(15-21)	B(0-30)	B(0-24)	BN(0-65)	B(0-36)	L(0-5)
LaÊ	393	366	465	168	340	379	352	344
Ce	"1,199"	"1,136"	"1,250"	686	"1,228"	"1,046"	"1,083"	"1,385"
Pr	105	99.9	127	36.5	92.0	91.7	86.1	88.1
Nd	409	397	513	150	361	366	338	351
Sm	96.1	94.7	119	33.8	87.0	82.1	76.0	80.6
Eu	23.2	22.7	28.7	8.42	20.8	19.5	17.9	18.7
Gd	85.4	86.1	111	33.9	79.5	79.6	67.6	73.3
Tb	13.8	14.2	18.1	5.49	13.1	13.1	10.6	11.6
Dy	80.3	82.2	105	34.2	74.9	74.8	57.9	64.6
Ho	13.7	14.4	18.6	6.65	13.2	13.8	9.65	10.9
Er	36.5	38.4	50.2	18.5	35.1	36.9	25.5	28.6
Tm	5.50	5.73	7.40	2.91	5.26	5.44	3.76	4.15
Yb	34.0	34.8	45.6	18.6	33.3	34.7	23.2	26.5
Lu	4.40	4.51	5.72	2.61	4.30	4.53	3.16	3.50
·REE	"2,499"	"2,398"	"2,863"	"1,206"	"2,388"	"2,247"	"2,155"	"2,490"
Ce*	1.40	1.41	1.22	2.03	1.64	1.32	1.46	1.88
								
	Adam Seamount							
	D8-3C	D8-3D	D8-5	D9-16A	D9-16B	D9-16C	D9-21A	
	L(5-17)	L(17-36)	BN (0-25)	B(0-55)	L(0-10)	L(10-55)	B(0-50)	
La	497	260	237	197	235	250	286	
Ce	"1,455"	564	813	729	926	819	880	
Pr	118	62.4	56.3	39.7	49.0	47.0	55.2	
Nd	467	249	218	164	200	191	227	
Sm	105	55.5	48.6	36.1	44.0	41.8	47.8	
Eu	24.2	13.0	10.8	8.69	10.4	9.91	11.6	
Gd	97.1	50.5	41.4	36.8	44.1	42.7	50.1	
Tb	15.4	7.89	6.29	6.02	6.95	6.78	8.15	
Dy	82.9	43.5	32.7	36.8	42.1	41.8	50.3
Ho	13.6	7.48	5.60	7.64	8.12	8.46	10.4
Er	34.4	19.2	14.4	21.6	21.6	24.5	29.4
Tm	5.05	2.85	2.04	3.32	3.27	3.69	4.48
Yb	31.4	18.5	13.5	21.7	21.1	23.9	27.9
Lu	4.22	2.49	1.85	3.03	3.00	3.34	3.92
·REE	"2,951"	"1,356"	"1,502"	"1,311"	"1,615"	"1,514"	"1,692"
Ce*	1.41	1.04	1.65	1.89	1.99	1.71	1.59




							
	Hoss Seamount		Little Joe	Ben Seamount		Flint	
	D11-4D	D11-11A	D14-4	D17-4	D17-6A	D21-1A	
	B(0-36)	B(0-70)	B(0-40)	B(0-25)	B(0-18)	B(0-15)	
La	378	409	389	437	472	259
Ce	"1,143"	"1,240"	"1,358"	"1,536"	"1,337"	"1,622"
Pr	79.2	--	84.2	102	109	47.2
Nd	321	369	341	404	440	186
Sm	68.5	--	73.6	89.7	97.7	38.7
Eu	16.1	20.0	17.8	21.6	23.4	9.14
Gd	68.7	--	72.3	85.2	93.7	39.5
Tb	11.1	--	11.7	13.6	15.1	6.43
Dy	66.7	--	68.1	77.9	87.3	40.2
Ho	13.0	16.0	13.3	14.6	17.0	8.54
Er	35.0	--	36.3	39.1	44.7	24.3
Tm	5.33	--	5.30	5.77	6.60	3.78
Yb	32.9	44.0	34.2	36.8	42.2	24.6
Lu	4.56	--	4.71	4.94	5.71	3.47
·REE	"2,244"	"2,098"	"2,509"	"2,868"	"2,791"	"2,312"
Ce*	1.52	--	1.74	1.70	1.37	3.31