Sign In
Ask Question
Cash Powers
Geography
19 May, 17:05
What volcanoes are on a divergent plate boundary
+2
Answers (
1
)
Jimmy Schwartz
19 May, 17:17
0
Places where plates are coming apart are called divergent boundaries. As shown in the drawing above, when Earth's brittle surface layer (the lithosphere) is pulled apart, it typically breaks along parallel faults that tilt slightly outward from each other. As the plates separate along the boundary, the block between the faults cracks and drops down into the soft, plastic interior (the asthenosphere). The sinking of the block forms a central valley called a rift. Magma (liquid rock) seeps upward to fill the cracks. In this way, new crust is formed along the boundary. Earthquakes occur along the faults, and volcanoes form where the magma reaches the surface. Where a divergent boundary crosses the land, the rift valleys which form are typically 30 to 50 kilometers wide. Examples include the East Africa rift in Kenya and Ethiopia, and the Rio Grande rift in New Mexico. Where a divergent boundary crosses the ocean floor, the rift valley is much narrower, only a kilometer or less across, and it runs along the top of a midoceanic ridge. Oceanic ridges rise a kilometer or so above the ocean floor and form a global network tens of thousands of miles long. Examples include the Mid-Atlantic ridge and the East Pacific Rise. Plate separation is a slow process. For example, divergence along the Mid Atlantic ridge causes the Atlantic Ocean to widen at only about 2 centimeters per year
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Find an answer to your question 👍
“What volcanoes are on a divergent plate boundary ...”
in 📗 Geography if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
Blank is thought to be another factor that'll affect climate change a global warming b carbon monoxide c the nitrogen cycle d the coriolis effect
Answers (1)
What is the greatest negative environmental impact that occurs when people live in suburbs instead of living in cities? a. Suburbanites do not recycle. b. Suburbanites have higher rates of cardiovascular disease. c.
Answers (2)
Explain the environmental issues faced by the society due to rapid industrialization and raise in population? (3m)
Answers (1)
What is so unusual about the motions of Venus and Uranus
Answers (1)
Average temperature of a tropical savanna
Answers (1)
New Questions in Geography
What map is used to make road and weather map
Answers (1)
What were the Egyptian political and religious leaders called? A. kings B. pharaohs C. emperors D. sultans
Answers (1)
What do you think what do you notice about population distribution and settlement location in ancient Egypt
Answers (1)
How high does the earth's atmosphere extend? A. 100 m B. 1,000 m C. 10 km D. 100km
Answers (2)
How to grow plants in space?
Answers (1)
Home
»
Geography
» What volcanoes are on a divergent plate boundary
Sign In
Sign Up
Forgot Password?