It is called the crater
The opening of a volcano is called the caldera.
The opening of a volcano is called the vent.The opening of a volcano is called a vent.
It is the volcano.
Vent .
It is the volcano.
If you look at the volcano side ways that little curve on top is called a cradle i think
that would be a volcano
The opening in a volcano is called the mouth.
a volcano is formed when the plates hit each other.
You are asking about the mouth.
volcano is my answer
The opening top of the volcano is called a crater. The super-heated gases and ash billows out of the mouth of hell before the magma erupts out destroying all in its path.