lava
a valcano
Vent
lava
Volcanoes
An opening in Earth's crust through which lava flows is called a volcano. When pressure from molten rock beneath the surface builds up, it can erupt through the volcano, releasing lava, ash, and gases into the surrounding area.
a valcano
Valcano
A volcano erupts when molten rock, known as magma, flows through a central opening in the Earth's crust called a vent. This release of magma, gases, and ash can result in a volcanic eruption.
Crater or vent. Sometimes lava also comes from fissures as well. However crater is the most commonly used term.
Lumen
the opening where the lava flows is call a vent
it is just called molten rock, and it comes out of the Earths crust via volcanoes. you can also say that its melted lava