| Hell's Half Acre Lava Field(expression, name, volcano, geology) |
| Henry's Fork Caldera(expression, name, volcano, geology) |
| Huckleberry Ridge Tuff(expression, name, volcano, geology) |
| Island Park Caldera(expression, name, volcano, geology) |
| Itcha Range(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) |
| La Reforma(expression, name, volcano, geology) |
| Laguna Colorada(expression, name, volcano, geology) |
| Laguna Escondida(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) |
| Lone Butte(expression, name, volcano, geology) |
| Lord Howe Island(expression, name, volcano, geology) |
| Los Colorados(expression, name, volcano, geology) |
| Lyttelton Harbour(expression, name, volcano, geology) |