Table 3 Physical characteristics of volcanoes in each age group at Harrat Khaybar
From: Spatio-temporal forecasting of future volcanism at Harrat Khaybar, Saudi Arabia
Age Group | Age Range | Eruptive style | Number of vents | Number of fissures | Spatial Distribution | Orientation | Recurrence rate (eruptions/10 kyr) |
|---|---|---|---|---|---|---|---|
1 | 1.7 Ma - 600 ka | Shield volcanoes | 62 | 3 | Scattered | NW | 0.55 |
2 | 600–450 ka | Lava domes | 20 | – | Clustered | NW | 1.27 |
3 | 450–300 ka | Scoria cones | 268 | 28 | Alignment | NNW | 17.8 |
4 | 300–150 ka | Explosive volcanoes | 5 | – | Clustered | – | 0.27 |
5 | 150–0 ka | Shield volcanoes and a composite volcano | 29 | 6 | Alignment | NNW | 1.87 |
All Age groups | 1.7 Ma – 0 | Diverse | 384 | 37 | Alignment | N-S | 2.25 |