Question

whats the definition of xenolithic

Answer 1

It is a piece of rock that is within an igneous rock, and it was not from the original magma. It was introduced into that igneous rock later from surrounding rocks.

Answer 2

A xenolith (Ancient Greek: "foreign rock") is a rock fragment which becomes enveloped in a larger rock during the latter's development and solidification. In geology, the term xenolith is almost exclusively used to describe inclusions in igneous rock during magma emplacement and eruption.