Petrology description of rocks while petrography is the speciality that deals with microscopic details. In the petroleum industry, lithology, or more specifically mud logging, is the graphic representation of geological formations being drilled through, and drawn on a log called a mud log. As the cuttings are circulated out of the borehole they are sampled, examined (typically under a 10× microscope) and tested chemically when needed. Petrology utilizes the fields of mineralogy, petrography, optical mineralogy, and chemical analysis to describe the composition and texture of rocks. Petrologists also include the principles of geochemistry and geophysics through the study of geochemical trends
Empirical study of literature when it is concerned with questions of reading. In these two areas research and studies based on the framework are steadily growing. Further fields where the framework in various revised and expanded versions attracts scholarship is (comparative) cultural studies and pedagogy. One of several dictionary definitions of the field is as follows: “Movement within the study of literature concerned with the study of literature as a social system of [inter]actions. The main question is what happens to literature: it is written, published, distributed, read, censored, imitated, etc. The empirical study of literature originated as a reaction to, and an attempt