When magma beneath Earth's surface is forced up due to pressure, it flows out to Earth's surface through openings.
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The rim of a volcano is called the crater. It is the opening at the top of the volcano where gases and lava can escape during an eruption.
the rim of a volcano is called a caldera formed when igneous rock (formed when lava is cooled) is piled on top of each other causing a rim called a caldera.
The volcano belt around the Pacific Rim is known as the "Ring of Fire." This area is characterized by frequent seismic and volcanic activity due to the movement of tectonic plates.
they test the rim for burns
A live volcano is simply called an active volcano.
It is called a crater. The area around the sides is the crater rim. If the volcano has collapsed into an empty magma chamber, this is called a caldera, and can exist for both tall or wide volcanoes.
it is called a dormat volcano