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.
They are determined by their direction relative to one another. Divergent: The plates are moving away from each other. This results in plate margin ridges. Example: The Mid-Atlantic Ridge. Convergent: The plates are moving towards each other. This results in mountains and subduction zones. Example: Ocean trenches and chains of volcanoes. The Andes Mountain chain and off-shore ocean trench. Transform: The plates are sliding against each other in opposite directions.