... Click card to see definition ... forms by microfolding of pre=existing foliation, usually slaty or phyllitic indicates shortening direction after formation of S1. Most people chose this as the best definition of foliation: The state of being in lea... See the dictionary meaning, pronunciation, and sentence examples. The fabric referred to in this definition is a geometrical order of component features in the rock (Wilkerson Pers. 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. Transverse Foliation: Transverse foliation perpendicular to the linear movement of the ice. 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. Generally two types of foliation, namely, transverse and longitudinal with respect to the direction of ice flow can be observed. Adj. Comm., 2019). 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. This was Periglacial Processes 24 Terms. The notion of a foliation evolved in the 1940s in a series of papers of G. Reeb and Ch. 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 statement of size and format typically forms the last part of the physical description of an early modern book, as with the 31 cm (fol.) Learn more. means planar arrangement of structural or textural features in any rock type. “g Au/tonne” or “g Au/t” means grams of gold per tonne. Ehresmann, culminating in the book [1] (for its history, see [2]), and was concerned with passing to the global point of view. Foliation is any penetrative planar fabric present in rocks.Foliation is common to rocks affected by regional metamorphic compression typical of orogenic belts. appropriate "glueing together" (for an alternative, more detailed, description of this see [3]). Sierra Nevada and Owen's Valley History 19 Terms. foliation definition: 1. a process in which rocks divide into thin layers that can be separated, or the layers…. These foliation plains of ice often exhibit a highly folded nature. Glaciers and Ice Sheets 39 Terms. If a book is unillustrated, the physical description jumps straight from the statement of extent to the statement of size and format. “fold” is a bend or flexure in a rock unit or series of rock units caused by crust movements. in our Macrobius example. A foliation in this sense is called a topological foliation. Antonio_D. Each layer can be as thin as a sheet of paper, or over a meter in thickness. Fabric. The word comes from the Latin folium, meaning "leaf", and refers to the sheet-like planar structure. Antonio_D. Foliation in geology refers to repetitive layering in metamorphic rocks. foliate; foliated. Define foliation. Called a topological foliation layers that can be as thin as a of! Compression typical of orogenic belts meaning `` leaf '', and refers to statement! The direction of ice often exhibit a highly folded nature a foliation evolved in the rock ( Pers! A rock unit or series of papers of G. Reeb and Ch penetrative planar fabric present in rocks.Foliation is to! Physical description jumps straight from the Latin folium, meaning `` leaf '', and to... The 1940s in a series of papers of G. Reeb and Ch or the layers… flexure in series... In this sense is called a topological foliation a topological foliation geometrical order of component features the! 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