Why are rocks so close to a mid-ocean ridge younger than the ones that are farther away?
Mid-ocean ridges are basically underground volcanoes that lava from the Earth's Mantle can breach. The ocean, however, freezes the lava and that in turn forms rock. If this happens repeatedly, then the older rock gets pushed away from the source, and the younger, just formed rock is, therefore, closer to the ridge. So the younger rock being formed by the ridge is pushing away the older, previously made, igneous rock.
The evidence that supports Wegner's hypothesis is that in 1947 , a group of scientisits noticed two things about the Mid- Atlantic Ridge. The first thing that the scientists noticed was the sediment that covers the sea floor is thinner and younger closer to a ridge than it is farther from a ridge. Second, scientists learned that the ocean floor is very young. Radiometric dating shows that the sea floor closer to the mid-ocean ridge…
Is the oceanic crust near the mid-ocean ridge younger or older than the oceanic crust farther away from the ridge?
What is the difference between a rift valley and a mid ocean ridge and what kinds of boundaries do they form at?
Harry Hess was mapping the floor of the ocean when he found a mountain range in the middle of the ocean. He found that the land nearest to the ridge was younger compared to the fact that the farther away land was from the ridge, the older it dated. He used this to find that the mountain ridge was creating new land and pushing aside the old land.
The Oceanic Plates are younger than the continental because they are "recycled"; think of the oceanic ridges, such as the mid Atlantic oceanic ridge, that is where a hot spot under diverging plates (plates moving apart) push magma up, causing new young ocean floor to spread from this spot, and pushing the old floor into trenches and other continents, being destroyed. Another point to remember is that the ocean crust is thicker the farther away…
What is the relationship between the age of rocks on the ocean floor and the distance from the Mid-Atlantic ridge?
The farther away the rocks are, the older they are. When the lava bubbles up from the ridge, the tectonic plates move outward. As the process repeates itself and new lava comes up, the rocks are pushed farther and father away. As a result, the closest rocks are the newest, and the farthest rocks are the oldest!
they are related because they all have to do with the oceanic lithosphere.The convection causes the lithosphere to move sideways and away from the midocean ridges.The ridge push makes the oceanic lithosphere slide downhill under the force of gravity. The slab pull:the old lithosphere is denser than asthenosphere so, the edge of the tectonic plates that contains oceanic lithosphere sinks and plls the rest of the tectonic plate.