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.
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They measure how far away the rock is from the mid-ocean ridge. The farther, the older.
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.
Sediment closer to mid-ocean ridges is typically younger, coarser, and consists of more volcanic material compared to sediment farther away. This is because the closer proximity to the ridge results in a higher input of freshly erupted material from the underlying volcanic activity.
the ages of the rocks become increasingly older in samples obtained farther from the ridge and the younger had just come out the ridge.
the ages of the rocks become increasingly older in samples obtained farther from the ridge and the younger had just come out the ridge.
Sediment closer to a mid-ocean ridge is typically younger, thinner, and composed of more volcanic material compared to sediment farther away. This is because the ridge is a site of active seafloor spreading where new oceanic crust is formed, leading to a higher rate of sedimentation near the ridge.
Scientists discovered that rocks farther away from the mid-ocean ridge were older through radiometric dating of the rocks. By analyzing the age of the minerals within the rocks, researchers found that the rocks closest to the ridge were younger, while those farther away were older, supporting the theory of seafloor spreading.
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.