Full Definition of PRECEDING. See preceding defined for English-language learners. See preceding defined for kids. ADVERTISEMENT. I have had a fever of about three weeks during the last and preceding month, from which I am entirely recovered except as to strength. â 2 Thomas Jefferson, letter, 4 Sept. 1823.
This commonly happens along volcanoes. When lava comes out of the volcano, the rocks there melt, usually forming different rocks. If you are asking on the chemical basis as to why they melt, it's because rocks are formed from minerals crystals. These crystals are formed from elements, which in turn also melts (some rocks are made of carbon, and since carbon melts, rock melts too). Source(s): Gsevilla Â· 7 years ago.
Igneous rocks are those rocks that have cooled from magma either deep within the Earth or near or on Earth's surface. The temperatures required to melt rock to form magma are enormous and originate from a number of processes.Roughly 20% of Earth's heat is left over from Earth's formation.gneous rocks are those rocks that have cooled from magma either deep within the Earth or near or on Earth's surface. The temperatures required to melt rock to form magma are enormous and originate from a number of processes.