Petrology and cycles and the use of thermodynamic data and experiments in order to better understand the origins of rocks. There are three branches of petrology, corresponding to the three types of rocks: igneous, metamorphic, and sedimentary, and another dealing with experimental techniques: Petrology Petrology (from the Greek πέτρος, "pétros", "rock" and λόγος, "lógos", "subject matter", see -logy) is the branch of geology that studies rocks and the conditions under which they form. Petrology has three subdivisions: igneous, metamorphic, and sedimentary petrology. Igneous and metamorphic petrology are commonly taught together because they both contain heavy use of chemistry, chemical methods, and
What U See Is What U Get the music videos for Xzibit's songs "Paparazzi" and "The Foundation". The music video peaked at 1 during 6 weeks at BET's "Rap City". 12" Promo What U See Is What U Get "What U See Is What U Get" is the first single from Xzibit's second album, "40 Dayz & 40 Nightz". In its first week the song peaked at #50 on the "Billboard" Hot 100, being Xzibit's highest charting single. It peaked at #3 on Hot Rap Singles, his highest on that chart. A music video directed by Gregory Dark was filmed in Los Angeles. The deceptively simplistic premise