| Hyaloclastite Dam(expression, name, volcano, geology) |
| Indian Heaven(expression, name, volcano, geology) |
| Island Park Caldera(expression, name, volcano, geology) |
| Jemez Mountains(expression, name, volcano, geology) |
| Job Assemblage(expression, name, volcano, geology) |
| Juan de la Vega(expression, name, volcano, geology) |
| Kaena Ridge(expression, name, volcano, geology) |
| Ko'olau Range(expression, name, volcano, geology) |
| Koosick Bluff(expression, name, volcano, geology) |
| Kunlun Volcanic Group(expression, name, volcano, geology) |
| La Palma(expression, name, volcano, geology) |
| La Reforma(expression, name, volcano, geology) |
| Laguna Colorada(expression, name, volcano, geology) |
| Laguna Escondida(expression, name, volcano, geology) |
| Laguna Poco Sol(expression, name, volcano, geology) |
| Leon Muerto(expression, name, volcano, geology) |
| Lightning Peak(expression, name, volcano, geology) |
| Lisianski Island(expression, name, volcano, geology) |
| Little Barrier Island(expression, name, volcano, geology) |
| Little Iskut(expression, name, volcano, geology) |