| Potrillo volcanic field(expression, name, volcano, geology) |
| Prospect Dam(expression, name, volcano, geology) |
| Puchuldiza(noun, name, volcano, geology) |
| Pylon Assemblage(expression, name, volcano, geology) |
| Raton-Clayton volcanic field(expression, name, volcano, geology) |
| Red Hill volcanic field(expression, name, volcano, geology) |
| Rodrigues(noun, name, volcano, geology) |
| Saint George(expression, name, volcano, geology) |
| Satah Mountain volcanic field(expression, name, volcano, geology) |
| Snake River Plain(expression, name, volcano, geology) |
| Squamish volcanic field(expression, name, volcano, geology) |
| Steamboat Springs(expression, name, volcano, geology) |
| Taryatu-Chulutu(noun, name, volcano, geology) |
| Tenerife(noun, name, volcano, geology) |
| Timeline of volcanism on Earth(expression, name, volcano, geology) |
| Toba catastrophe theory(expression, name, volcano, geology) |
| Tuya Range(expression, name, volcano, geology) |
| Udokan Plateau(expression, name, volcano, geology) |
| Uinkaret volcanic field(expression, name, volcano, geology) |
| Volcanic Eifel(expression, name, volcano, geology) |