0
Why are the Oceanic ridges elevated compared to the surrounding ocean floor?
Wiki User
∙ 12y ago
It's believed in some instances that the Pacific Ocean is once where ancient civilisations of Mu and lemuria were located. Some ancient myths suggest an extinction level event occurred where a comet didn't Impact earth but passed by. The gravitational pull of the comet could in theory (depending on it's size) have torn part of the earth away from itself billions of years ago leaving the ridges as sign of the earths past torment.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What is a oceanic ridges?
a ridge in the ocean
What is oceanic ridges?
a ridge in the ocean
Where are the youngest portion of Earth's crust found?
The youngest parts of the Earth's crust are found in the oceanic crust. This crust is continuously being created at the mid-oceanic ridges.
What is mid - oceanic ridges?
mountainous topography
Where is oceanic crust created?
New oceanic crust is created at the mid-oceanic ridges, a divergent plate boundary.
What is the relationship between distance from the ridges and age of the crust?
At the oceanic ridges the age of igneous basalt rocks is approximately zero (as that is where they formed) and the rocks get older the farther away. The ages of sedimentary and metamorphic rocks does not correlate reliably with distance from the oceanic ridges like the ages of igneous rocks, because they can form anywhere not mainly at oceanic ridges. Igneous granite rocks are generally formed around continental volcanos not oceanic ridges.
What feature forms at diverging oceanic plates?
Ridges of buoyant oceanic crust form at diverging oceanic plate boundaries.
Is it true that The Atlantic and Pacific basins have oceanic ridges and the Indian Ocean has no oceanic ridge?
yah
What type of magmatic activity is characteristic of mid oceanic ridges?
At mid-oceanic ridges, plates are pulled apart in two separate directions. This creates a gap (rift valley), allowing for warm, buoyant magma to rise to the surface and cool. As the magma cools, it creates ridges along the rift valleys. The elevation is caused by the excess amount of newly created, less dense oceanic crust. This crust occupies more volume, which causes it to be higher up than the surrounding, older crust.
Why does oceanic lithosphere sink at subduction but not at mid ocean ridges?
oceanic lithosphere sinks at subduction zones but not at mid ocean ridges because at subduction zones the oceanic lithosphere is subducted, or sinks, under another plate. Oceanic Lithosphere sinks at subduction zones which are usually at convergent boundaries, but at mid-ocean ridges the plates are actually separating not coming together
Where can the youngest oceanic crust be found?
The youngest oceanic crust can be found near the mid-ocean ridges.
What are places where oceanic crust sinks back to the mantle?
No. Mid oceanic ridges are the places where new oceanic crust are forming.
