The “neck” – also called the “plug” – is the solidified remains of a volcano’s conduit and plumbing system and is the last impression an extinct volcano leaves. Geologists say that ...

"This signal may indicate magma accumulation in a shallow magma source or pressurization of a magmatic conduit beneath the ...

solid rocks incorporated into the magma from along the conduit or reservoir; and dissolved gases. Magma collects inside a volcano's magma chamber before it erupts. Nyiragongo's magma chamber is ...

is defined by the National Park Service as the solidified remains of a volcano’s conduit and plumbing system that endures after the rest of the volcano has faded away. There are volcanic necks ...

is defined by the National Park Service as the solidified remains of a volcano’s conduit and plumbing system that endures after the rest of the volcano has faded away. There are volcanic necks ...

New Jersey was once home to a fiery volcano roughly the size of Mount St. Helens – that sits in the same county as a newly ...