In geology, the term "xenolith" is almost exclusively used to describe inclusions in igneous rock during its formation and cooling process, but a broad definition could include rock fragments which have become encased in sedimentary rock.
In geology, the term "xenolith" is almost exclusively used to describe inclusions in igneous rock during its formation and cooling process. A broad definition could include rock fragments. These rock fragments have become encased in sedimentary rock.