Fabric is used to describe the spatial and geometric relationships that make up the rock. A coarsegrained, foliated rock produced by regional. Foliation is exhibited most prominently by sheety minerals, such as mica or chlorite. Example sentence with the word foliation azdictionary. Whether youre in search of a crossword puzzle, a detailed guide to tying knots, or tips on writing the perfect college essay, harper reference has you covered for all your study needs. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Yet given that you have made a choice of foliation you then put a flag at a point that picture of things only comes about if one looks at the spacetime as a foliation of spatial surfaces linked by lapse and shift functions. It is caused by shearing forces pressures pushing different sections of the rock in different directions, or differential pressure higher. Geology the set of layers visible in many metamorphic rocks as a result of the flattening and stretching of mineral grains during metamorphism. In this paper, the notion of a distribution will be presented which makes it possible for in. A good dictionary should be on the desk of every geologist and within easy reach. A decomposition of into pathconnected subsets, called leaves, such that can be covered by coordinate neighbourhoods with local coordinates, in terms of which the local leaves, that is, the connected components of the intersection of the leaves with, are given by the equations. Its eventual goal is to describe the classifying space for codlmenslon g foliated manifolds which has recently been constructed by. It reflects a considerable intensity of metamorphismi.
An introduction to distributions and foliations samuel otten michigan state university mth 864 spring 2008 in smooth manifold theory, the notion of a tangent space makes it possible for di. Foliation definition of foliation by merriamwebster. The compaction foliation and jointing in the redgray and reddish ashflow tuff to the right is roughly parallel to jointing in the granitic rock on the left, and roughly parallel to the contact geology on the road. However, foliation is most welldevelopedthat is, the rock layers have experienced the greatest amount of flatteningin the gneisses and other coarsegrained rocks of high metamorphic grade which form under high pressure and in temperatures above 320 c 608 f. The entire contents of the glossary of geology 5th edition, revised is available as a kindle or nook e book. Foliation definition is the process of forming into a leaf. The word comes from the latin folium, meaning leaf, and refers to the. Proper usage and audio pronunciation plus ipa phonetic transcription of the word foliation. In architecture, an ornamentation consisting of a carved leaf shape, as in trefoils.
A foliation in this sense is called a topological foliation. Commonly a lineation lies in the plane of a foliation in the same rock. Websters new world college dictionary, 4th edition. Or, the ancient changes of the earth and its by charles lyell 1865. Geological observations on the volcanic islands and parts of south america by george brettingham sowerby, william lonsdale, edward forbes, charles darwin 1897.
This course teaches english spelling rules with interactive exercises and spelling tests, helping learners with problems such as dyslexia to improve their english spelling and helping others to learn english as a foreign language. Geology the set of layers visible in many metamorphic rocks as a result of the. Geology the arrangement of the constituents of a rock in leaflike layers, as in. Foliations synonyms, foliations pronunciation, foliations translation, english dictionary definition of foliations. Sitting on the fence and turning a corner everyday idioms in newspapers october 09, 2019. Search foliation and thousands of other words in english definition and synonym dictionary from reverso. Foliation, a geometric device used to study manifolds. Foliation meaning in the cambridge english dictionary. Use our dictionary to check the spelling definitions of words. American heritage dictionary of the english language, fifth edition. In irregularly shaped grains of minerals, orientation of the optical axes of the grains and other crystallographic characteristics may be observed. Foliation may parallel original sedimentary bedding, but.
Foliation may parallel original sedimentary bedding, but more often is oriented at some angle to it. Foliation article about foliation by the free dictionary. Geological background, rock mechanics significance, and preliminary investigations at olkiluoto abstract a well developed, pervasive foliation is a characteristic feature of the migmatites and gneisses in the olkiluoto bedrock, and. Information and translations of foliation in the most comprehensive dictionary definitions resource on the web. Regular foliation article about regular foliation by the. Definition of foliation from the collins english dictionary. The word comes from the latin folium, meaning leaf, and refers to the sheetlike planar structure. The analogy is seen directly in three dimensions, by taking and. The subjects of this dictionary are most of geological terms but there are many terms that. Look up foliation, foliate, or foliated in wiktionary, the free dictionary foliation may refer to. Information and translations of foliation in the most comprehensive dictionary definitions resource on. Wikipedia, lexilogos, oxford, cambridge, chambers harrap, wordreference, collins lexibase dictionaries, merriam webster.
The process of numbering consecutively the leaves of a book or manuscript. Each layer may be as thin as a sheet of paper, or over a meter in thickness. Text book of geology by archibald geikie 1903 production of foliation. The general direction of foliation is a few degrees south of east, subject, of course, to many local changes. Foliation may be formed by realignment of micas and clays via physical rotation of the minerals within the rock.
Architecture decoration of an opening with cusps and foils, as in. Browse the amazon editors picks for the best books of 2019, featuring our favorite reads in more than a dozen categories. Choose from 81 different sets of foliation flashcards on quizlet. You can complete the definition of foliation given by the english definition dictionary with other english dictionaries. Foliated definition in the cambridge english dictionary. Foliation definition of foliation by the free dictionary.
If is a covering between manifolds, and is a foliation on, then it pulls back to a foliation on. Its best observed on a surface perpendiculat to foliation layers, because one can see those multiple layers. Pdf the new penguin dictionary of geology researchgate. Noun geology a linear feature in rock, often structural. Petrotectonic analysis is used to study the rules of orientation and the rules for decoding the motions that cause the orientation. With all content and formatting from the hardcopy version faithfully reproduced, you get the browsing experience of the hardcopy with the searchability and portability of an e book. They show that curved inclusion trails may form even with no coupling, as the porphyroblast overgrows foliation that is deflected around it. Also called primary structures which formed without the influence of any tectonic forces. Exposure to these extreme conditions has altered the mineralogy, texture, and chemical composition of the rocks. It frequently occurs during rock folding, with the foliation usually subparallel to the axial planes of the folds. The most extreme form of contactmeta morphism has been reserved for the last part of this section.
Foliations definition of foliations by the free dictionary. Recent examples on the web but because according to general relativity spacetime is curved, there is no standard way to extend a local foliation to the entire universe. Beam, modeling growth and rotation of porphyroblasts and inclusion trails, d. Intersection lineations are measured in relation to the two structures which intersect to form them. Foliation geology, a property of certain rocks a pagination system in book production. Geology the layered structure common to metamorphic rocks. Rock foliations and lineations are indistinct or lacking. Each layer can be as thin as a sheet of paper, or over a meter in thickness. A great affinity exists in foliation between terebinthace and sapindace foliation is especially characteristic of gothic architecture. Foliation dictionary definition foliation defined yourdictionary.
Foliation in geology refers to repetitive layering in metamorphic rocks. Foliation definition and meaning collins english dictionary. The editors, scientific american, readers respond to is time an illusion. Information about foliation in the dictionary, synonyms and antonyms. Foliation forms what mineral grains orient themselves in such a way that they create repetitive planar structures. Yet given that you have made a choice of foliation you then put a flag at a point that picture of things only comes about if one looks at the spacetime as a foliation of spatial surfaces linked by lapse and shift functions the spatial portion of the metric is well known and the solution involves spatial surfaces in a foliation where volumes contain there. What does foliation mean definition of foliation word. Foliation may be regional, manifesting itself over large areas, or local, related to shifts along tectonic displacements. Schistosity, mode of foliation that occurs in certain metamorphic rocks as a consequence of the parallel alignment of platy and lathshaped mineral constituents. Glossary of geology american geosciences institute. Metamorphic rocks have been modified by heat, pressure, and chemical processes, usually while buried deep below earths surface. I thought while looking at this outcrop the last time i stopped, that there might be some faulting or shearing between the whitish layer and the upper, densest.
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