Igneous rocks are also formed when volcanoes erupt, causing the magma to rise above the earth's surface.
(Igneous rocks; are formed; T:when volcanoes erupt; causing the magma to rise above the earth's surface) (volcanoes; erupt; )
Igneous rocks volcanoes
are formed erupt
T:when volcanoes erupt causing the magma to rise above the earth's surface