Asked by Hannah Saskowski on Jun 15, 2024
Verified
Which of the following processes could result in a felsic magma?
A) partial melting of an intermediate-composition source
B) partial melting of continental crust
C) formation and settling of mafic crystals in an intermediate magma
D) all of these
Felsic Magma
Magma that is high in silica and light in color, typically associated with explosive volcanic eruptions.
Intermediate-Composition
Refers to igneous rocks with a silica content between mafic and felsic rocks, often associated with volcanic activity.
- Discuss the pathways through which magma comes into existence and evolves over time, specifically through partial melting and differentiation of magma.
Verified Answer
AT
ambrea trionfoJun 19, 2024
Final Answer :
D
Explanation :
All of the listed processes can lead to the formation of felsic magma. Partial melting of an intermediate-composition source or continental crust can directly produce felsic magma due to the lower melting point of felsic minerals. The formation and settling of mafic crystals in an intermediate magma can concentrate the remaining melt in silica, thus making it more felsic.
Learning Objectives
- Discuss the pathways through which magma comes into existence and evolves over time, specifically through partial melting and differentiation of magma.