Here's why:
* Magma Composition: Magma is classified based on its silica content:
* Felsic: High silica content (65-75%)
* Intermediate: Medium silica content (55-65%)
* Mafic: Low silica content (45-55%)
* Ultramafic: Very low silica content (less than 45%)
* Melting Point: Silica content directly influences the magma's melting point. Felsic magma, with its high silica content, has the highest melting point.
* Coolest Temperature: Because felsic magma has the highest melting point, it forms at the coolest temperatures compared to other types of magma.
Additional Notes:
* Felsic magmas are typically associated with continental crust and are responsible for forming granite and rhyolite.
* They tend to be more viscous (thick and sticky) than other types of magma due to their high silica content.
Let me know if you have any other questions!