Biology 210 with Walsh at Trident Technical College *. * The material on this site is created by StudyBlue users. StudyBlue is not affiliated with, sponsored by or endorsed by the academic institution or instructor.
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 Â· 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 Â· 8 years ago.
Seamount and Guyot. Mid-Oceanic Ridges  1.These are the most conspicuous features of the ocean basins.  2.The mid-ocean ridge is a continuous chain of mountains that runs from the central Arctic Ocean down through the Atlantic, through the Indian Ocean and northward through the eastern Pacific.  3.The mid-ocean ridge is approximately 1000 km wide and rises 1000 to 3000 m above the adjacent seafloor.  4.The mid-ocean ridge is 60,000 km long and covers 21% of Earth's surface.  5.