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