intrusive rock- Lord of Light (Wikipedia)
Lord of Light (1967) is a science fantasy novel by American author Roger Zelazny. It was awarded the 1968 Hugo Award for Best Novel, and nominated for a Nebula Award in the same category. Two chapters from the novel were published as novelettes in the Magazine of Fantasy and Science Fiction – “Dawn” in April 1967, and “Death and the Executioner” in June 1967.
- Igneous rock (Wikipedia)
Igneous rock (igneous from Latin igneus ‘fiery’), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava.