Petrology 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 phase diagrams. Sedimentary petrology is, on the other hand, commonly taught together with stratigraphy because it deals with the processes that form sedimentary rock. Lithology was once approximately synonymous with petrography, but in current usage, lithology focuses on macroscopic hand-sample or outcrop-scale
The "What Time Is Love?" Story The "What Time Is Love?" Story The "What Time Is Love?" Story is a compilation album by British electronic music duo The KLF, comprising six versions of their techno track "What Time Is Love?". By 1989 (see 1989 in music), the popularity of the "Pure Trance Original" of "What Time Is Love?" in European clubs had reportedly spawned eighteen unauthorised cover versions and sound-alikes. In a novel move, some of these were collated by The Orb's Alex Paterson at The KLF's behest, and released as a compilation album entitled "The "What Time Is Love?" Story", which was sold commercially for