Скачать или смотреть Seafloor spreading Theory/সমুদ্র বক্ষের বিস্তৃতি || GeographyataGlance || Geography at a Glance

‪@GeographyataGlance‬
Hi,this is Today I have discussed the seafloor spreading theory by Harry Hess.

What is Seafloor Spreading?
The seafloor spreading hypothesis was proposed by the American geophysicist Harry H. Hess in 1960.
Seafloor spreading is the process of magma welling up in the rift as the old crust pulls itself in opposite directions. Cold seawater cools the magma, creating a new crust.
The upward movement and eventual cooling of this magma has created high ridges on the ocean floor over millions of years.However, the seafloor is destroyed in subduction zones, where oceanic crust slides under continents and sinks back into the mantle, and is reforged at seafloor spreading ridges. The East Pacific Rise is a site of major seafloor spreading in the Ring of Fire.It is located on the divergent boundary of the Pacific Plate, the Cocos Plate (west of Central America), the Nazca Plate (west of South America), the North-American Plate and the Antarctic Plate.

The body bounded below by a core and above by a crust.Mantle convection describes the movement of the mantle as it transfers heat from the white-hot core to the brittle lithosphere.The mantle is heated from below, cooled from above, and its overall temperature decreases over long periods of time.What can be the Impact of Seafloor Spreading?Seafloor spreading influences sea level and carbon cycles.

Sea Level:Increasing the rate of seafloor spreading inflates the ridge. A hot, young lithosphere is forming and moving away from the ridge at a faster rate and moving a greater distance from the ridge before it cools and contracts. So sea level rises

Carbon Cycle-Faster rates mean more volcanic activity, which injects greenhouse gases into the atmosphere. || #GeographyataGlance || #Geography at a Glance