Lebanon County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 133,568. Its county seat is Lebanon. The county was formed from portions of Dauphin and Lancaster counties in 1813, with minor boundary revisions in 1814 and 1821. Lebanon County comprises the Lebanon, PA Metropolitan Statistical Area, which is also included in the Harrisburg-York-Lebanon, PA Combined Statistical Area.
sedimentary rocks change with heat and pressure and become metamorphic rock then rocks melt into magma.
It wouldn't have to in the case of an instant melting from a meteor impact. Normally though, the evolution of a magma from sedimentary rock would include a very long process i â¦ nvolving the gradual introduction of heat and/or pressure, causing the sedimentary rock to first metamorophose into a different type of rock.