Bowen's reaction series describes:

Correct option is D

Bowen's Reaction Series is a concept in geology that explains the systematic crystallization of minerals from magma as it cools. The series is divided into two branches: the discontinuous series and the continuous series.
1. Discontinuous Series:
Minerals like olivine, pyroxene, amphibole, and biotite crystallize in a sequence where the earlier mineral phases react with the cooling magma to form the next stable mineral.
2. Continuous Series:
Plagioclase feldspar changes composition from calcium-rich varieties (like anorthite) to sodium-rich varieties (like albite) as the magma cools.
3. As cooling progresses, minerals such as quartz, muscovite, and potassium feldspar crystallize last in the remaining silica-rich magma.
Bowen's Reaction Series provides insights into the mineralogical composition of igneous rocks, helping geologists predict the mineral assemblages in different rock types based on their cooling history.
Information Booster: 1. Discontinuous Series: Minerals form and then react to form new minerals (e.g., olivine → pyroxene → amphibole → biotite).
2. Continuous Series: Plagioclase feldspar evolves in a gradual transition from calcium-rich to sodium-rich as cooling continues.
3. Final Crystallization: Minerals such as quartz and potassium feldspar form in the last stages of magma cooling.
4. Applications: Bowen's Reaction Series is fundamental to understanding igneous rock formation and magma evolution.
5. Significance: Helps predict rock types and their mineral compositions in varying tectonic and magmatic settings.