Table 4 Regional variations in numbers of tephra recovered by OD.
From: VOLCORE, a global database of visible tephra layers sampled by ocean drilling
Atlantic | Caribbean | East Pacific | Gulf of Mexico | Indian Ocean | Mediterranean | Southern Ocean | West Pacific | |
|---|---|---|---|---|---|---|---|---|
No. of drill holes | 1094 | 37 | 1002 | 62 | 364 | 116 | 250 | 961 |
No. holes with tephra | 200 | 20 | 309 | 17 | 95 | 51 | 54 | 413 |
Total no. tephra | 2,594 | 2,093 | 4,359 | 99 | 1,260 | 759 | 824 | 22,708 |
Max. tephra per hole | 127 | 921 | 161 | 28 | 211 | 164 | 195 | 2,526 |
Mean tephra per hole | 13 | 105 | 14 | 6 | 13 | 15 | 15 | 55 |
Median tephra per hole | 3.5 | 15.5 | 5 | 2 | 5 | 3 | 3 | 9 |
Mode tephra per hole | 1 | 3 | 1 | 2 | 1 | 1 | 1 | 2 |
