Download A Late Paleozoic association of plants found only on the

A Late Paleozoic association of plants found only on the Southern Hemisphere continents and India; named for its best‐known genus, Glossopteris. The theory that the continents were joined into a single landmass that broke apart with the various fragments (continents) moving with respect to one another. The name Alfred Wegener proposed for a supercontinent consisting of all Earth’s landmasses at the end of the Paleozoic Era. A physical phenomenon resulting from moving electricity and the spin of electrons in some solids in which magnetic substances are attracted toward one another. The area in which magnetic substances are affected by lines of magnetic force emanating from Earth. Residual magnetism in rocks, studied to determine the intensity and direction of Earth’s past magnetic fi eld. The temperature at which ironbearing minerals in cooling magma or lava attain their magnetism. The phenomenon involving the complete reversal of the north and south magnetic poles. The theory that the seafloor moves away from spreading ridges and is eventually consumed at subduction zones. A type of circulation of material involving only the asthenosphere or the entire mantle during which hot material rises, moves laterally, cools and sinks, and is reheated and continues the cycle. Any deviation, such as a change in average strength, in Earth’s magnetic field. The theory holding that large segments of Earth’s outer part (lithospheric plates) move relative to one another. The boundary between two plates that are moving apart. The boundary between two plates that move toward each other. A convergent plate boundary along which two oceanic plates collide and one is subducted beneath the other. A convergent plate boundary along which oceanic lithosphere is subducted beneath continental lithosphere. A convergent plate boundary along which two continental lithospheric plates collide. A plate boundary along which plates slide past one another and crust is neither produced nor destroyed. A fault along which one type of motion is transformed into another; commonly displaces oceanic ridges; on land, recognized as a strikeslip fault, such as the San Andreas fault. A localized zone of melting below the lithosphere that probably overlies a mantle plume; detected by volcanism at the surface.