A geology dictionary that is used regularly is one of the most important tools for developing professional competence. 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. The analogy is seen directly in three dimensions, by taking and. Search foliation and thousands of other words in english definition and synonym dictionary from reverso. Foliation geology, a property of certain rocks a pagination system in book production. A good dictionary should be on the desk of every geologist and within easy reach. Foliation meaning in the cambridge english dictionary.
Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a. Choose from 81 different sets of foliation flashcards on quizlet. 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 process of numbering consecutively the leaves of a book or manuscript. 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. Foliation definition of foliation by the free dictionary. Metamorphic rocks pictures of foliated and nonfoliated types. Foliations synonyms, foliations pronunciation, foliations translation, english dictionary definition of foliations. Commonly a lineation lies in the plane of a foliation in the same rock.
You can translate the dictionary words into your native language. Text book of geology by archibald geikie 1903 production of foliation. Exposure to these extreme conditions has altered the mineralogy, texture, and chemical composition of the rocks. Foliation may parallel original sedimentary bedding, but more often is oriented at some angle to it. Petrotectonic analysis is used to study the rules of orientation and the rules for decoding the motions that cause the orientation. Sitting on the fence and turning a corner everyday idioms in newspapers october 09, 2019. Foliation definition, the act or process of putting forth leaves. Schistosity, mode of foliation that occurs in certain metamorphic rocks as a consequence of the parallel alignment of platy and lathshaped mineral constituents. Its best observed on a surface perpendiculat to foliation layers, because one can see those multiple layers.
Glossary of geology american geosciences institute. Wikipedia, lexilogos, oxford, cambridge, chambers harrap, wordreference, collins lexibase dictionaries, merriam webster. A great affinity exists in foliation between terebinthace and sapindace foliation is especially characteristic of gothic architecture. 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 flattening and stretching of mineral grains during metamorphism. Its eventual goal is to describe the classifying space for codlmenslon g foliated manifolds which has recently been constructed by. Metamorphic rocks have been modified by heat, pressure, and chemical processes, usually while buried deep below earths surface. Information and translations of foliation in the most comprehensive dictionary definitions resource on the web. 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. Foliation may be formed by realignment of micas and clays via physical rotation of the minerals within the rock. It frequently occurs during rock folding, with the foliation usually subparallel to the axial planes of the folds. Beam, modeling growth and rotation of porphyroblasts and inclusion trails, d. For instance, according to the measurement conventions of structural geology, original bedding, s 0 intersected by a folds axial plane foliation, forms an intersection lineation l 01, with an azimuth and. Information and translations of foliation in the most comprehensive dictionary definitions resource on.
What does foliation mean definition of foliation word. Geology the arrangement of the constituents of a rock in leaflike layers, as in. 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. Browse the amazon editors picks for the best books of 2019, featuring our favorite reads in more than a dozen categories. In architecture, an ornamentation consisting of a carved leaf shape, as in trefoils. If is a covering between manifolds, and is a foliation on, then it pulls back to a foliation on. Example sentence with the word foliation azdictionary. Foliation, a geometric device used to study manifolds.
Often this foliation is associated with diagenetic metamorphism and lowgrade burial metamorphism. Websters new world college dictionary, 4th edition. In this paper, the notion of a distribution will be presented which makes it possible for in. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Geology the layered structure common to metamorphic rocks. Geological observations on the volcanic islands and parts of south america by george brettingham sowerby, william lonsdale, edward forbes, charles darwin 1897. Proper usage and audio pronunciation plus ipa phonetic transcription of the word foliation. The general direction of foliation is a few degrees south of east, subject, of course, to many local changes.
Foliation dictionary definition foliation defined yourdictionary. Pdf the new penguin dictionary of geology researchgate. Or, the ancient changes of the earth and its by charles lyell 1865. Each layer may be as thin as a sheet of paper, or over a meter in thickness. In geology, repeating layers of this rock are called foliation. Architecture decoration of an opening with cusps and foils, as in. 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. Foliation definition of foliation by merriamwebster. Regular foliation article about regular foliation by the. They show that curved inclusion trails may form even with no coupling, as the porphyroblast overgrows foliation that is deflected around it.
The layers are planar, and parallel but not necessarily to bedding 4 or cleavage 5. Foliation definition and meaning collins english dictionary. It is caused by shearing forces pressures pushing different sections of the rock in different directions, or differential pressure higher. 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. Foliated definition in the cambridge english dictionary. The entire contents of the glossary of geology 5th edition, revised is available as a kindle or nook e book. The word comes from the latin folium, meaning leaf, and refers to the.
It reflects a considerable intensity of metamorphismi. The editors, scientific american, readers respond to is time an illusion. Also called primary structures which formed without the influence of any tectonic forces. Fabric is used to describe the spatial and geometric relationships that make up the rock. 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. Definition of foliation from the collins english dictionary. Foliation forms what mineral grains orient themselves in such a way that they create repetitive planar structures. Each layer can be as thin as a sheet of paper, or over a meter in thickness. Foliation is exhibited most prominently by sheety minerals, such as mica or chlorite. Foliations definition of foliations by the free dictionary. Foliation may be regional, manifesting itself over large areas, or local, related to shifts along tectonic displacements. 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.
Rock foliations and lineations are indistinct or lacking. 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. American heritage dictionary of the english language, fifth edition. A foliation in this sense is called a topological foliation. The most extreme form of contactmeta morphism has been reserved for the last part of this section. 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. Use our dictionary to check the spelling definitions of words. You can complete the definition of foliation given by the english definition dictionary with other english dictionaries.
Information about foliation in the dictionary, synonyms and antonyms. Foliation may parallel original sedimentary bedding, but. Below you will find example usage of this term as found in modern andor classical literature. Geology the set of layers visible in many metamorphic rocks as a result of the. Foliation in geology refers to repetitive layering in metamorphic rocks. Foliation definition is the process of forming into a leaf. The word comes from the latin folium, meaning leaf, and refers to the sheetlike planar structure. Through this lesson, you will learn about the process of foliation and its different types. 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. Foliation article about foliation by the free dictionary. Intersection lineations are measured in relation to the two structures which intersect to form them. A l s o c a l l e d s e c o n d a r y structures which formed due to tectonic movements and activities. A coarsegrained, foliated rock produced by regional. In irregularly shaped grains of minerals, orientation of the optical axes of the grains and other crystallographic characteristics may be observed.
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