xenoblast
/ˈzɛnəˌblæst/
noun
- A mineral crystal in a metamorphic rock that does not have its own characteristic shape because it grew in a crowded space.
- The presence of a xenoblast suggests the rock underwent intense pressure during formation.
- Under the microscope, the xenoblast appeared irregular because it formed between other minerals.
- Geologists identified the rock as having many xenoblasts that grew without clear crystal faces.
Antonyms