Constructive.
...at constructive plate margins / boundaries.hence the term contructive, new crust is "contructed" here.(and destructed at a destructive plate margin / boundary / subduction zone.)
that it caused sea floor spreading
spreading boundary
Spreading is generally thought of when speaking of sea-floor spreading. Sea-floor spreading takes place at the mid-ocean ridge where two oceanic plates are spreading/pulling apart from one another.
Subduction and sea floor spreading are both a result of the movement of the tectonic plates.Plate Tectonics
...at constructive plate margins / boundaries.hence the term contructive, new crust is "contructed" here.(and destructed at a destructive plate margin / boundary / subduction zone.)
DA ANSWER ISseafloor spreadingThe_process_by_which_molten_material_adds_new_oceanic_crust_to_the_ocean_floor_is_calledThe_process_by_which_molten_material_adds_new_oceanic_crust_to_the_ocean_floor_is_called
sea floor-spreading..;)
A sea cave is destructive. It is a sign that the sea has found a weakness in the rock/cliffs at the edge of the land. Over millions of years, the sea will cut even deeper, and maybe the roof of the cave will collapse, and a cove or inlet is formed.
Sea floor spreading occurs at the mid ocean ridges.
Sea floor spreading occurs at mid-ocean ridges
The Super Continent was broken apart, in part by sea-floor spreading.Scientists discovered that sea-floor spreading continues to move the continents.Sea-floor spreading can be measured using specialized equipment.
They could help in creating new lithospheric (crust) plates. As in the case of divergent boundary, where new ocean floor is produced and expanded (sea-floor spreading).
Creation of new crust through up swelling and out rising of magma to cover areas of sea floor spreading or lithospheric seperation.
Spreading Of ocean floor
sea-floor spreading
the sea floor is spreading about 3cm every year answers will vary but it is usually around 3cm