Is it possible for 2 igneous rocks to have the same mineral composition but be different rocks?

Question:

Is it possible for 2 igneous rocks to have the same mineral composition but be different rocks?

Rock

A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included its chemical composition and how it is formed. Rocks are usually grouped into three main groups: igneous rocks, metamorphic rocks, and sedimentary rocks.

Answer and Explanation:

Yes, in particular, it was that minerals that form in the same general range on Bowen's reaction series are found together in the same igneous rocks. e.g 2- Gabbro and basalt are two igneous rocks having the same chemical composition, and the same minerals (plagioclase feldspar + pyroxene), but are of different origins. Gabbros form at depths and cool slowly, whereas basalts are volcanic rocks that crystallize rapidly at the surface of the earth.


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Classification of Igneous Rocks: Textures and Composition

from Earth Science 101: Earth Science

Chapter 7 / Lesson 4
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