Table 1.

Table 1. Feldspar size measurements of tephra fall layers, Site 998.

Core, section	Layer (cm)				Size (µm)
Core, section	Top	Base	Thickness	Age (Ma)	Median	Average	Standard deviation	Maximum	Minimum
165-998A-
3H-4	18	30	12.0	0.9	195	203	38	345	157
13H-3	18	33	15.0	7.6	219	226	35	320	184
13H-5	106	124	18.0	7.8	202	206	34	277	154
14H-6	0	21	21.0	8.7	181	181	36	257	127
16H-6	73	83	10.0	10.0	213	218	21	264	187
17H-4	119	129	10.0	10.7	219	223	41	328	157
20X-1	132.5	135	2.5	11.9	215	210	32	267	153
20X-2	3	14	11.0	14.0	205	215	41	309	145
20X-2	73	77	4.0	14.7	150	150	21	189	109
21X-1	125	132	7.0	15.1	198	199	32	267	144
21X-3	45	52	7.0	15.5	198	199	32	267	144
21X-4	60	80	20.0	15.6	305	309	46	459	259
23X-4	77	81	4.0	16.6	162	176	58	386	100
23X-5	36	50	14.0	16.7	150	156	24	217	132
24X-1	91	99	8.0	17.0	167	168	26	229	133
25X-1	90	108	18.0	17.5	47	52	22	108	24
25X-2	90	106	16.0	17.6	139	148	32	213	100
27X-1	115	121	6.0	18.8	288	294	45	389	195
27X-2	78	85	7.0	19.1	218	225	28	311	196
27X-3	21	22	1.0	19.2	165	167	19	200	135
27X-4	0	14	14.0	19.0	157	159	24	205	116
28X-1	100	115	15.0	22.1	229	223	37	277	155
28X-3	97	103	6.0	21.6	192	196	25	253	155
29X-3	68	70	2.0	20.1	298	318	80	551	232
36X-2	81	87	6.0	23.8	147	143	25	176	80
37X-1	140	148	8.0	24.5	175	175	22	223	146

Notes: Minimum size is of the 20 smallest feldspar crystals. All other measurements are of the 20 largest feldspar crystals. All measurements taken along the long axis.