Definition: Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.
Input: original question: Which rock type has the parent rock type of [Trondhjemite]?
answer: igneous rock
answer type: Rock type.
auxiliary information: Trondhjemite is a leucocratic intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites. Trondhjemite is common in Archean terranes occurring in conjunction with tonalite and granodiorite as the TTG orthogneiss suite. Trondhjemite dikes also commonly form part of the sheeted dike complex of an ophiolite.

The parent rock type of which rock type is [Trondhjemite]?