Fabric. Foliation is any penetrative planar fabric present in rocks.Foliation is common to rocks affected by regional metamorphic compression typical of orogenic belts. Each layer can be as thin as a sheet of paper, or over a meter in thickness. means planar arrangement of structural or textural features in any rock type. Generally two types of foliation, namely, transverse and longitudinal with respect to the direction of ice flow can be observed. Foliation in geology refers to repetitive layering in metamorphic rocks. Define foliation. Rocks exhibiting foliation include the typical metamorphic rock sequence of slate, phyllite, schist and gneiss.The slatey cleavage typical of slate is due to the parallel growth of microscopic mica crystals. This was Periglacial Processes 24 Terms. A foliation is any sort of fabric-forming planar or curved planar geologic structure in a metamorphic rock, ... because they may provide clues about the history of the geology surrounding them. If a book is unillustrated, the physical description jumps straight from the statement of extent to the statement of size and format. These foliation plains of ice often exhibit a highly folded nature. A foliation in this sense is called a topological foliation. Learn more. Transverse Foliation: Transverse foliation perpendicular to the linear movement of the ice. Antonio_D. Sierra Nevada and Owen's Valley History 19 Terms. “g Au/tonne” or “g Au/t” means grams of gold per tonne. foliate; foliated. Definition of foliation A general term for a planar arrangement of textural or structural features in any type of rock; esp., the planar structure that results from flattening of the constituent grains of a metamorphic rock. Most people chose this as the best definition of foliation: The state of being in lea... See the dictionary meaning, pronunciation, and sentence examples. A penetrative secondary foliation and lineation, defined by tectonically flattened and elongated fragments, are present in the Onaping Formation of the South and East Ranges of the Sudbury Basin. The fabric referred to in this definition is a geometrical order of component features in the rock (Wilkerson Pers. Glaciers and Ice Sheets 39 Terms. The word comes from the Latin folium, meaning "leaf", and refers to the sheet-like planar structure. Adj. “fold” is a bend or flexure in a rock unit or series of rock units caused by crust movements. Comm., 2019). The notion of a foliation evolved in the 1940s in a series of papers of G. Reeb and Ch. ... 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