Questions and Answers
What is subduction?
Subduction is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate and sinks into the mantle as the plates converge.
What is a rift valley?
A rift valley is a linear-shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault.
What is a volcanic arc?
A volcanic arc is a curved chain of volcanoes in the overriding tectonic plate of a subduction zone formed by rising magma from the melting of the downgoing plate.
Which of the following best describes subduction?
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Study Notes
Subduction
- Occurs at convergent boundaries where one tectonic plate sinks under another.
- Involves the movement of the subducting plate into the mantle.
- Plays a critical role in geological processes such as earthquakes and volcanic activity.
Rift Valley
- Characterized as a linear lowland between highlands or mountain ranges.
- Formed by geological rifting or faulting, where tectonic forces pull apart the Earth's crust.
Volcanic Arc
- Consists of a curved chain of volcanoes on the overriding tectonic plate in a subduction zone.
- Result of magma rising due to the melting of the downgoing plate.
- The curvature of volcanic arcs is influenced by the Earth's spherical shape.
- The Andes mountains in South America exemplify a major volcanic arc.
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Description
Explore key concepts related to subduction, volcanic arcs, and rift valleys with these flashcards. Each card provides definitions and visual aids to enhance your understanding of tectonic processes and landforms.
