What is the difference between mid-ocean ridges and trenches?
Mid-ocean ridges (eg. Mid Atlantic Ridge) are formed at constructive plate boundaries, where magma is welling up between two diverging plates and forming new plate materiel. Trenches (eg. Marianas Trench) are formed at destructive plate boundaries where an ocean plate is being subducted below a continental plate.Chariotmender · 8 years ago.id Atlantic Ridge) are formed at constructive plate boundaries, where magma is welling up between two diverging plates and forming new plate materiel. Trenches (eg. Marianas Trench) are formed at destructive plate boundaries where an ocean plate is being subducted below a continental plate. Chariotmender · 8 years ago. A subduction zone occurs at convergent plate margins where an oceanic plate is going underneath a continental plate or a less dense oceanic plate. A mid-ocean ridge is a diver … gent plate boundary on the ocean floor with a mountain range and a rift running through the center of it.hat is the difference between volcanism at a hotspot and volcanism at mid-ocean ridge? At a hotspot, a plume of hot magma comes up through the mantle, causing vulcanism. Ridges are NOT formed by collision-they are formed by separation of ocean crust-by two plates pulling apart. Running down the centre of the Atlantic is the Mid Atlantic Ridge. This is formed where the Eurasian plate on one side and the North American separate.The tension of this breaks the crust and forms a diverging boundary-which as the third answer clarifies is then filled by upwelling got material.id Atlantic Ridge) are formed at constructive plate boundaries, where magma is welling up between two diverging plates and forming new plate materiel. Trenches (eg. Marianas Trench) are formed at destructive plate boundaries where an ocean plate is being subducted below a continental plate. Chariotmender · 8 years ago. Report Abuse. A trench is due to the convergence of two oceanic plates. One is subducted under the other and forms a deep trench. A mid-ocean ridge is due to sea floor spreading.There, two oceanic plates are being pushed apart due to the formation of new sea floor. This new sea floor creates a large ridge.eport Abuse. A trench is due to the convergence of two oceanic plates. One is subducted under the other and forms a deep trench. A mid-ocean ridge is due to sea floor spreading. A mid-ocean ridge is a volcanic mountain range in the middle of the ocean that is formed by hot magma pushing up under a divergent boundary. Between these mountain ranges is a place on the ocean floor where the lava comes out of the mantle, this is called a rift valley.eport Abuse. A trench is due to the convergence of two oceanic plates. One is subducted under the other and forms a deep trench. A mid-ocean ridge is due to sea floor spreading. What is the difference between volcanism at a hotspot and volcanism at mid-ocean ridge? At a hotspot, a plume of hot magma comes up through the mantle, causing vulcanism.At a mid-oceanic ridge, two plates move away from eachother, leaving space that is filled by … magma. Hotspots and mid-oceanic ridges can exist together at the same place, Iceland being a prime example of this.hat is the difference between volcanism at a hotspot and volcanism at mid-ocean ridge? At a hotspot, a plume of hot magma comes up through the mantle, causing vulcanism. Mid-ocean ridges are geologically important because they occur along the kind of plate boundary where new ocean floor is created as the plates spread apart. Thus the mid-ocean ridge is also known as a spreading center or a divergent plate boundary..The plates spread apart at rates of 1 cm to 20 cm per year. As oceanic plates move apart, rock melts and wells up from tens of kilometers deep.he mid-ocean ridge wraps around the globe for more than 65,000 km like the seam of a baseball. The average depth to the crest (top) of the ridge is 2500 m, but it rises above sea-level in Iceland and is more than 4000 m deep in the Cayman Trough. The buoyant melt rises as magma at a linear weakness in the oceanic crust, and emerges as lava, creating new crust upon cooling. A mid-ocean ridge demarcates the boundary between two tectonic plates, and consequently is termed a divergent plate boundary.ceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. There are two processes, ridge-push and slab pull, thought to be responsible for the spreading seen at mid-ocean ridges, and there is some uncertainty as to which is dominant. Ridge separating the Antarctic Plate from the Australian-Indian Plate; its topography is more regular than the topography of the Southwest Indian and Mid-Indian ridges. Trench located south of Indonesia, between the Australian-Indian and the Eurasian Plates; it is the deepest point in the Indian Ocean (24,440 ft).rench (26,460 feet) bordering South America; the world&#8217s longest trench (3,700 mi), it is located on the boundary between the Nazca Plate and the South American Plate. Mountain range separating the Pacific and Antarctic plates; it joins the eastern Pacific Ridge off the coast of South America. Divergent-where two plates are moving away from one another. (Mid-ocean Ridge)   Convergent-where two plates are moving towards one another. (Ocean Trench) found at bo … th O/O converge and O/C converge.hat is the difference between volcanism at a hotspot and volcanism at mid-ocean ridge? At a hotspot, a plume of hot magma comes up through the mantle, causing vulcanism.
Mid-ocean ridges (eg. Mid Atlantic Ridge) are formed at constructive plate boundaries, where magma is welling up between two diverging plates and forming new plate materiel. Trenches (eg. Marianas Trench) are formed at destructive plate boundaries where an ocean plate is being subducted below a continental plate.Chariotmender ·