Andesiitit

I’m not aware of a widely recognized subject named “andesiitit.” To generate an accurate wiki-style article under 300 words, I need a bit more context. Could you clarify what andesiitit refers to—such as a place, organization, concept in a field, a person, a term from a language, or a fictional element? If you’d prefer, I can also create a concise, fictional encyclopedia entry for Andesiitit, clearly labeled as fictional. Please specify your preference and any desired scope or audience.