| Saint George(expression, name, volcano, geology) |
| Salar Grande(expression, name, volcano, geology) |
| Sezill Volcano(expression, name, volcano, geology) |
| Shield Nunatak(expression, name, volcano, geology) |
| Snake River Plain(expression, name, volcano, geology) |
| Spectrum Dome(expression, name, volcano, geology) |
| Spectrum Range(expression, name, volcano, geology) |
| Squamish volcanic field(expression, name, volcano, geology) |
| Steamboat Springs(expression, 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) |
| Tweed Volcano(expression, name, volcano, geology) |
| Twin Peaks(expression, name, volcano, geology) |
| Udokan Plateau(expression, name, volcano, geology) |
| Uinkaret volcanic field(expression, name, volcano, geology) |
| Volcanic Eifel(expression, name, volcano, geology) |
| Waianae Range(expression, name, volcano, geology) |
| Wells Gray-Clearwater volcanic field(expression, name, volcano, geology) |
| Wolverine Formation(expression, name, volcano, geology) |