In 1968 the average salary of men teachers in maintained schools in England and Wales was Â£1,646. I estimate that the last two pay settlements have raised this figure to about Â£1,880. The comparable figure at 31st March, 1963, was Â£1,244.
Two main tectonic structures are spreading centers and subduction zones. Spreading centers occur at the boundary between two plates that are moving apart, called divergent plate boundaries. Here the plate motion opens a gap between the plates and magma from the mantle rises up through it.
10 hilariously insightful foreign words. A subduction zone is a convergent boundary where two tectonic plates collide. Plates are large, dense masses in the crust of the Earth, the lithosphere, that float on top of liquefied rock in the asthenosphere.They are constantly shifting and moving, so when they subduct, one pushes beneath the other.hen an oceanic plate encounters a continental plate, the oceanic plate plunges beneath the other plate. Subduction zones are at high risk for earthquakes. Ocean trenches are most often located parallel to volcanic islands, at the boundary of a subduction zone.