This heating and crushing was due to nearby igneous volcanic activity about 400 million years ago.

During the early part of the era, considerable igneous activity took place in neighboring states to the east.

A period of widespread igneous activity began about 40 million years ago.

The Waziristan hills were subject to igneous activity during the late Cretaceous period.

There is little evidence of subsequent igneous activity on the Moon.

Deformational events are often also associated with volcanism and igneous activity.

Continued extension leads to accelerated igneous activity, including repeated eruptions.

In addition, mantle plumes may heat the lithosphere and cause prodigious igneous activity.

Laccolith formations are caused by igneous activity otherwise known as melting within the earth.

Intrusive igneous activity involves the movement of rock bodies towards the Earth's surface.