Author Question: Compare and contrast the formation of a primary magma to that of a secondary magma. How does each ... (Read 79 times)

faduma · **on:** Jul 15, 2018

Compare and contrast the formation of a primary magma to that of a secondary magma. How does each form?

What will be an ideal response?

Question 2

Match the geologic location with the type of mountain building. Please note that your choices may be used more than once.

A) Fault-block mountain building
B) Andean-type mountain building
C) Alpine-type mountain building
D) Cordilleran-type mountain building
E) Island arc-type mountain building

1) Sierra Nevada Mountains
2) Himalayan Mountains
3) North American Cordillera
4) Basin and Range Province
9) The Alps
5) Teton Range
6) Japanese Archipelago

phuda · **Reply #1 on:** Jul 15, 2018

Answer to Question 1

Answer: Primary magmas are generated through the partial melting of ultramafic rock. This makes a mafic magma. As this magma rises due to lower density, the ferromagnesian crystals will settle out, resulting in a more silica-rich, felsic, or intermediate magma. This would be the secondary magma.

Answer to Question 2

Answers: 1) B 2) C 3) D 4) A 5) C 6) A 7) E