A crystal in an igneous rock that is not derived from the original magma.
More example sentences
- This could represent a xenocryst derived from Archaean basement rocks of the region.
- Again, the lack of zircon xenocrysts in this sample does not allow discrimination between these alternatives.
- The xenocrysts provide evidence that earlier Neoproterozoic rocks were present in the region and that locally rocks date back to 1929 Ma.
Definition of xenocryst in:
- The British & World English dictionary