There are three types of reservoirs in the lithospheric cycle: igneous, metamorphic and sedimentary rocks. various processes, such as burial and melting, volcanism, or erosion move this material from one reservoir to another. the major process that drives the rock cycle is plate tectonics, the movement of earth's crustal plates that is driven by convection currents of the magma within the earth itself. students are investigating the types of rocks found in various locations throughout california, the state where they live and attend school. what hypothesis might the students formulate to guide their research on rock formation, given that they live in california?