It depends on the volcano. There's no Bureau of Volcanoes that goes around enforcing that every volcano conforms to the VLCNO-9001 standard or something.
Yellowstone
The opening of a volcano is known as a crater. There are also vents found in volcanic mountains from which lava flows.
a volcano is formed when the plates hit each other.
A cinder cone volcano
A shield volcano.
Vent .
The opening of a volcano is called the caldera.
The opening in the center of a volcano is a crater.
It is the volcano.
The opening of a volcano is called the vent.The opening of a volcano is called a vent.
A shield volcano is low and wide.
The opening of a volcano is known as a crater. There are also vents found in volcanic mountains from which lava flows.
the mouth of the volcano, or caldera.
volcano
a volcano is formed when the plates hit each other.
A cinder cone volcano
A shield volcano.
Vent .