Table T6. Volcanic ash layers observed at Site 1146.

Core, section,
interval (cm)		 Top
Bottom Thickness
(cm)
Depth
(mbsf)		 Depth
(mcd)
Depth
(mbsf)		 Depth
(mcd)		 Remarks/comments
184-1146A-






2H-2, 102 6.42 7.37   6.42 7.37 <1 Isolated black pumice clast
6H-1, 76-79 42.66 45.91   42.69 45.94 3 Strongly bioturbated ash layer
7H-6, 91-93 59.81 62.31   59.83 62.33 2 Light gray graded ash
8H-5, 17-19 67.07 70.07   67.09 70.09 2 Light gray graded ash
9H-7, 28-29 79.68 83.28   79.69 83.29 1 Graded fine-grained black ash layer
12H-1, 47-48 99.37 105.17   99.38 105.18 1 Black pumic fragment
12H-7, 27-28 108.17 113.97   108.18 113.98 1 White pumice fragment
19H-5, 10-14 171.50 181.65   171.54 181.69 4 Ash layer with basal black pumice fragments
26X-CC, 30-33 241.87 256.42   241.90 256.45 3 Dark gray altered ash layer with zeolites
33X-6, 98-99 307.98 326.73   307.99 326.74 1 Green ash layer at the top of a foraminifer turbidite
36X-5, 143 335.83 357.93   335.83 357.93 <1 Green, volcanic glass layer ending a foraminifer turbidite
184-1146B-




 
2H-2, 30 9.10 10.35   9.10 10.35 <1
7H-3, 49-50 58.29 62.29   58.30 62.30 1
12H-5, 57-60 108.87 115.87   108.90 115.90 3 Dark ash layer with 1-cm-long glass shards
12H-6, 133 111.13 118.13   111.13 118.13 <1 Ash-filled bioturbations
19H-2, 58-62 170.88 181.63   170.92 181.67 4 Black ash layer with basal pumice fragments
26X-4, 95-98 240.95 256.50   240.98 256.53 3 Graded volcanic ash with pyrite
184-1146C-




 
3H-3, 55-57 23.55 24.35   23.57 24.37 2 Pumice lump
5H-4, 9-11 43.59 45.79   43.61 45.81 2 Light gray ash layer
7H-2, 3-7 59.53 62.18   59.57 62.22 4 Light gray ash layer
7H-7, 30-31 67.30 69.95   67.31 69.96 1 Bioturbated ash layer
9H-2, 103-104 79.53 83.58   79.54 83.59 1 Light gray ash layer
9H-4, 65-68 82.15 86.20   82.18 86.23 3 Black patch with volcanic fragment
19X-1, 0-4 172.10 182.40   172.14 182.44 4 Black ash layer with basal pumice fragments
25X-4, 1-11 238.21 249.76   238.31 249.86 10 Dark interval between 1 and 11 cm containing ~35% of altered and fresh volcanic glass mixed with clay (and a lesser amount of nannofossils)
29X-2, 142-145 275.02 292.17   275.05 292.2 3 White ash layer on top of a foraminifer turbidite, with gradational upper boundary