Marijuana on Federal Lands. Posted: January 27, 2014. With the legalization of marijuana in the State of Colorado, Mesa Verde National Park would like to provide clarification regarding the use of possession of marijuana on Federal lands.
Plate Tectonics. Plate tectonics is the movement of the Earth's crust through convection currents that occur in the mantle. Divergent plate boundaries occur where hot magma rises to the surface, pushing the plates apart. The mid-ocean ridges form at divergent plate boundaries.
Why, then, is the inner core solid and the outer core molten instead of the other way around? The inner core of the Earth is solid in spite of the high temperature due to the high pressure. Describe the process of plate tectonics. Give specific examples of geographic features created by plate tectonics. Plate tectonics is the movement of large portions of the crust. The movement is caused by magma squeezing out along the mid-oceanic ridges pushing the plates apart in a process called seafloor spreading. Some geographical features created by plate tectonics include mountain ranges, submarine trenches, island arcs such as Hawaii, and volcanoes.