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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.
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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.
Mid-ocean ridges are actually underwater mountain ranges?
Yes, mid-ocean ridges are elevated areas on the ocean floor where tectonic plates spread apart, creating new oceanic crust. These ridges can indeed be considered underwater mountain ranges due to their topographic relief and the volcanic activity associated with them.
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.
Is the oceanic lithosphere thick and brittle?
Yes, the oceanic lithosphere is relatively thinner and more brittle compared to the continental lithosphere. This is due to the cooling and solidifying processes that occur at mid-ocean ridges, which result in a thinner and more rigid lithosphere in oceanic regions.
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
How are oceanic ridges form?
divergent boundaries
