Table 2.
Sill intrusion density observations.
| Basin location | ID | Survey name | Distance (km) | Area (km2) | Nobs | Ncorr | Area density, ρ |
|---|---|---|---|---|---|---|---|
| (10–3 sills km–2) | |||||||
| Rockall | 1 | NEROCK | 280 ± 50 | 493 | 36 | – | 73 |
| Faroe-Shetland | 2 | Judd | 200 ± 80 | 1330 | 62 | – | 47 |
| Møre (47) | 3 | Edvarda | 630 ± 20 | 1440 | 27 | – | 30 |
| Rockall | 4 | INROCK | 800 ± 100 | 8077 | 98 | 290–340 | 39 ± 3 |
| Vøring & Møre (17) | 5 | Various | 750 ± 250 | 80,000 | 735 | 2205–3675 | 37 ± 9 |
| Rockall | 6 | DGER96 | 850 ± 150 | 38,500 | 191 | 545–610 | 15 ± 1 |
| Rockall | 7 | DGWH96 | 650 ± 150 | 19,090 | 85 | 190–230 | 11 ± 1 |
| Rockall | 8 | OGA | 475 ± 325 | 145,000 | 920 | 2786–2970 | 20 ± 1 |
| Rockall | 9 | ISROCK | 1100 ± 200 | 41,167 | 46 | 108–139 | 3 ± 0.5 |
| Porcupine | 10 | Various | 1500 ± 300 | 75,868 | 112 | 240–310 | 4 ± 0.5 |
All area density data based on our own seismic interpretations except where a reference number is given next to the basin location. ID numbers show location on Fig. 6. Distance is relative to the plume centre in Figs. 6 and 8. Nobs is the number of sills observed on the seismic data. Ncorr is the number of sills after correction for missing sills on 2D surveys (Supplementary Fig. 4); a dash in this column indicates a 3D survey that does not require a missing sills correction