Plate tectonics stuff is below. Follow this link for Large Igneous Provinces and Mantle Plumes.
The brick and sandpaper earthquake machine. An explanation of why large earthquakes occur at tectonic plate boundaries.
An easy non-technical look at earthquakes and plate tectonics for the budding amateur seismologist.
That worlds (also Races) are periodically destroyed by fire (volcanoes and earthquakes) and water, in turn, and renewed, is a doctrine as old as man. . . . Twice already has the face of the globe been changed by fire, and twice by water, since man appeared on it. As land needs rest and renovation, new forces, and a change for its soil, so does water. Thence arises a periodical redistribution of land and water, change of climates, etc., all brought on by geological revolution, and ending in a final change in the axis. (H.P. Blavatsky, The Secret Doctrine, 2:725-6)
In the latter half of the 19th century, when the above passage was written, the idea of submerged continents was accepted by many prominent geologists. This continued to be the case well into the 20th century, though the idea gradually began to go out of fashion. In the mid-1960s came the plate-tectonics ‘revolution’ in the earth sciences. Plate tectonics firmly denies that large landmasses can be elevated from the ocean floor or submerged to oceanic depths.
According to plate tectonics, the earth’s outer shell, or lithosphere, is divided into a number of large, rigid, moving plates that interact at their boundaries, where they converge, diverge, or slide past one another. Such interactions are believed to be responsible for most of the seismic and volcanic activity of the earth. Plates cause mountains to rise where they push together, and continents to fracture and oceans to form where they rift apart. The continents, sitting passively on the backs of the plates, drift with them, at the rate of a few centimeters a year. At the end of the Permian, some 250 million years ago,* all the present continents are said to have been gathered together in a single supercontinent, Pangaea, consisting of two major landmasses: Laurasia in the north, and Gondwanaland in the south. Pangaea is believed to have started fragmenting in the Early Jurassic, leading to the configuration of oceans and continents observed today.
There is now a thread on Above Top Secret discussing these matters so some of the material here will probably be outlines of what is being discussed there.
And the conventional view!
Plate Tectonics by Mark W. Williams Ph.D. (PPT)
The slide towards the end that says there will be a new super-continent in 250 years should obviously say 250 million years!