Volcano type
Maars and tuff cones
Flat craters and low rings of tuff, blasted out when magma meets water.
When magma meets groundwater or seawater, the water flashes into steam and phreatomagmatic explosions follow. They blast out wide, shallow craters – maars – surrounded by a rim of shattered rock, or build tuff cones and tuff rings. Many maars were later filled by lakes, as in Germany's Eifel.
- Volcanoes
- 17
- Confirmed eruptions
- 17
| Volcano | Country | Elevation | Eruptions | Last |
|---|---|---|---|---|
| Isla San Luis | Mexico | 183 m | 3 | 1,141 BCE |
| Dallol | Ethiopia | −48 m | 2 | 2011 |
| Megata | Japan | 160 m | 2 | 2,050 BCE |
| Ukinrek Maars | United States | 91 m | 2 | 1977 |
| Yonemaru-Sumiyoshiike | Japan | 40 m | 2 | 6,200 BCE |
| Blue Lake Crater | United States | 1,136 m | 1 | 680 |
| Buzzard Creek | United States | 830 m | 1 | 1,050 BCE |
| Dotsero | United States | 2,230 m | 1 | 2,200 BCE |
| Kinenin | Russia | 583 m | 1 | 850 |
| Tutuila | American Samoa | 653 m | 1 | 440 |
| Ubehebe Craters | United States | 752 m | 1 | 150 BCE |
| Cerro Tujle | Chile | 3,550 m | 0 | — |
| Korath Range | Ethiopia | 912 m | 0 | — |
| Laguna Aramuaca | El Salvador | 181 m | 0 | — |
| Lake Turkana Central Island | Kenya | 518 m | 0 | — |
| Lake Turkana North Island | Kenya | 490 m | 0 | — |
| Soda Lakes | United States | 1,251 m | 0 | — |