Namenda XR. Uses. Memantine is used to treat moderate to severe confusion (dementia) related to Alzheimer's disease. It does not cure Alzheimer's disease, but it may improve memory, awareness, and the ability to perform daily functions.
Where the plates meet, their relative motion determines the type of boundary: convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically ranges from zero to 100 mm annually.
The red arrows show the direction of drift at the plate boundaries. (N.B. The fact that large portions of the ocean floor, as well as continental expanses, seem to be solid plates has tended to discredit the term - continental drift - and to establish the alternative term - plate tectonics. The three main Tectonic Plates boundary types. The tendency for volcanoes to erupt and for earthquakes to impact in various parts of the world seems to relate directly to the existence of underlying tectonic plates and the type of plate movements:-.