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.
Igneous rock forma- tion involves melting, while the formation of metamorphic rocks does not. Compare and contrast igneous and metamorphic rocks. The sedimentary rock could become buried at depths where temperatures and pressures were great enough to cause melt- ing. When the melted material (magma) cooled and hardened, an igneous rock would form.