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
This Is What the Truth Feels Like listed it at number 18 out of the year's 20 best and wrote, "Stefani has never sounded more vulnerable than she does on "This Is What the Truth Feels Like", a vivid assortment of urgent, top 40 goods". Notes Credits adapted from the liner notes of the international deluxe edition of "This Is What the Truth Feels Like". Musicians Technical Artwork This Is What the Truth Feels Like This Is What the Truth Feels Like is the third studio album by American singer Gwen Stefani. It was released on March 18, 2016, by Interscope Records. Initially, the album was scheduled