Table of Contents
- 1 Why are mid ocean ridges elevated quizlet?
- 2 What is the function of the oceanic ridge quizlet?
- 3 What happens at an oceanic ridge?
- 4 What feature of the ocean floor develops where the oceanic lithosphere?
- 5 Why does the oceanic lithosphere Subduct while continental lithosphere does not quizlet?
- 6 Why are mid-ocean ridges elevated above the surrounding seafloor?
- 7 What is the primary reason for the elevated position of the ridge?
- 8 Why does the Mid Atlantic Ridge have a slow spreading rate?
Why are mid ocean ridges elevated quizlet?
Where in the oceans are biological communities thriving without sunlight? Why are mid ocean ridges elevated compared to the surrounding ocean floor? Because newly formed lithosphere is hotter and therefore less dense than the surrounding rocks. Which of the following is not part of an ophiolite complex?
What is the function of the oceanic ridge quizlet?
A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.
Why does the lithosphere thicken as it moves away from the ridge as a result of seafloor spreading quizlet?
Newly created oceanic lithosphere is hot and therefore less dense than cooler rocks of the deep ocean basin. Why does the lithosphere thicken as it moves away from the ridge as a result of seafloor spreading? Because it is cooled from above as seawater circulates through the pore spaces and fractures in the rock.
Why does the lithosphere thicken as it moves away from a mid-ocean ridge?
The oceanic lithosphere thickens as it ages and moves away from the mid-ocean ridge. This thickening occurs by conductive cooling, which converts hot asthenosphere into the lithospheric mantle, and causes the oceanic lithosphere to become increasingly dense with age.
What happens at an oceanic ridge?
Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth’s tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.
What feature of the ocean floor develops where the oceanic lithosphere?
Oceanic lithosphere forms at midocean ridges, where hot magma upwells, and then cools to form plates as the material moves away from the spreading center. As the plate cools, heat flow decreases and the seafloor deepens (Figure 3).
Which is characteristic of mid-oceanic ridges?
A mid-ocean ridge (or mid-oceanic ridge) is an underwater mountain range, typically having a valley known as a rift running along its axis, formed by plate tectonics. This type of oceanic ridge is characteristic of what is known as an oceanic spreading center.
Why are oceanic ridges more elevated than the rest of the sea floor?
The asthenosphere tends to break, while the lithosphere tends to flow. Why are oceanic ridges more elevated than the rest of the sea floor? A. Ridges are elevated because the rocks are hot.
Why does the oceanic lithosphere Subduct while continental lithosphere does not quizlet?
Why does oceanic lithosphere subduct while continental does not? Oceanic lithosphere subducts because its overall density is greater than that of the underlying mantle. slab-pull sinking of cold dense slab, ridge-push elevated position of ridge.
Why are mid-ocean ridges elevated above the surrounding seafloor?
At the ridge, new crust forms by igneous intrusion and extrusion. Since hot rocks are in a more expanded state and then contract as they cool (as they spread away from the ridge), the midocean ridges stand up high above the surrounding seafloor. The seafloor depth increases with distance away from the midocean ridges.
Which of the following increases with distance from the Mid oceanic ridge?
The age, density, and thickness of oceanic crust increases with distance from the mid-ocean ridge.
Which of the following increases with distance from the Mid Oceanic Ridge?
What is the primary reason for the elevated position of the ridge?
Along the axis of some segments of the oceanic ridge system What is the primary reason for the elevated position of the oceanic ridge system? Newly created oceanic lithosphere is hot and therefore less dense than cooler rocks of the deep ocean basin.
Why does the Mid Atlantic Ridge have a slow spreading rate?
Because it is cooled from above as seawater circulates through the pore spaces and fractures in the rock. Compare and contrast a low spreading center such as the Mid Atlantic Ridge with one that exhibits a faster spreading rate, such as the East Pacific Rise. Slow develops rift valley along ridge crust.
Why does the lithosphere thicken as it moves away from the ridge?
Why does the lithosphere thicken as it moves away from the ridge as a result of seafloor spreading? Because it is cooled from above as seawater circulates through the pore spaces and fractures in the rock.
What features on the ocean floor most resemble flood basalt provinces?
What is?.. What features on the ocean floor most resemble flood basalt provinces on the continents? Using Darwin’s hypothesis, place these coral reefs in order from youngest to oldest: Barrier Reef, Atoll, and Fringing Reef.