Xenolithic

[Gregory]

[Xenolithic] adj. Geological descriptive terminology of a foreign, rocky material that has fallen into, or become [embedded] into, [magma] before it solidifies. Much later, when seen in microscopes or visible ground exposures, the appearance is strikingly distinctive; often of a different color or texture when compared to the surrounding material. Thus,[xeno] meaning strange or foreign or alien, and [lithic], meaning rock or rock-like substance, was combined to describe these aberrations.
The word [xenolithic] is now used as an adjective or adverb to describe a substance or article or situation or action that is strikingly out of place or extremely unexpected based upon common experience and expectations.