Question

Which of the following changes occurred to the crust as this collisional mountage range formed?

Choose one or more:

A.creation of a fold-thrust belt

B.suturing

C.regional metamorphism

D.creation of a new continental volcanic arc

E.widespread hydrothermal metamorphism

F.formation of a new continental rift

Answer 1

A collisional mountain range may result in the creation of a fold-thrust belt, regional metamorphism, and suturing of tectonic plates.

Step-by-step explanation:

As a collisional mountain range forms, several changes can occur to the crust. These include the creation of a fold-thrust belt, which is a series of mountains created by the compression of two colliding tectonic plates, and regional metamorphism, a process where rock minerals and textures are changed due to exposure to extreme pressure and temperature within the Earth's crust. Moreover, there can also be the occurrence of suturing, which is the joining of two continental plates after collision, evidenced by the presence of suture zones. While other phenomena like volcanic arcs and rifts can form due to tectonic activities, they are more common in other contexts such as subduction zones and rifting events, respectively.

Answer 2

Changes to the crust during the formation of a collisional mountain range include the creation of a fold-thrust belt, suturing of continental plates, and regional metamorphism. These changes contribute to the development of the mountain range's distinctive structural features.

Step-by-step explanation:

As a collisional mountain range formed, several changes occurred to the crust, which can be exemplified by the formation of the Appalachian/Caledonide Mountains. The following changes are likely to have occurred:

• Creation of a fold-thrust belt: When two continental plates collide, the crust buckles and folds, leading to the formation of ridges and valleys in a fold-thrust belt.
• Suturing: This refers to the process where two colliding continental plates eventually merge to form a single landmass.
• Regional metamorphism: The intense pressure and temperature changes during the collision can lead to regional metamorphism, altering the mineralogy and texture of rocks.

These processes result in the characteristic features of collisional mountain ranges, such as the Appalachian/Caledonide Mountains, and are observed in other mountain-forming events on Earth and even on other planets.