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.
Â· just now. Report Abuse. Tectonic plate movement creates ocean basins at mid-oceanic ridge by vulcanism from due to decompression of upwelling of convecting mantle. It is not the tectonic plates that create this movement; convection of the mantle does that. Since tectonic plates are mechanically coupled to the aesthenosphere they are pulled along as the mantle convects.