A geology dictionary that is used regularly is one of the most important tools for developing professional competence. If is a covering between manifolds, and is a foliation on, then it pulls back to a foliation on. What does foliation mean definition of foliation word. Foliation definition and meaning collins english dictionary. The general direction of foliation is a few degrees south of east, subject, of course, to many local changes. Foliation geology, a property of certain rocks a pagination system in book production. Foliation may parallel original sedimentary bedding, but. Wikipedia, lexilogos, oxford, cambridge, chambers harrap, wordreference, collins lexibase dictionaries, merriam webster. Foliation article about foliation by the free dictionary. Foliation in geology refers to repetitive layering in metamorphic rocks.
Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a. Foliation definition of foliation by the free dictionary. Foliation dictionary definition foliation defined yourdictionary. Pdf the new penguin dictionary of geology researchgate. American heritage dictionary of the english language, fifth edition. In architecture, an ornamentation consisting of a carved leaf shape, as in trefoils. 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. Geology the arrangement of the constituents of a rock in leaflike layers, as in.
You can translate the dictionary words into your native language. Sitting on the fence and turning a corner everyday idioms in newspapers october 09, 2019. It reflects a considerable intensity of metamorphismi. Beam, modeling growth and rotation of porphyroblasts and inclusion trails, d. Also called primary structures which formed without the influence of any tectonic forces. Geology the set of layers visible in many metamorphic rocks as a result of the flattening and stretching of mineral grains during metamorphism. 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. Websters new world college dictionary, 4th edition. A foliation in this sense is called a topological foliation. In irregularly shaped grains of minerals, orientation of the optical axes of the grains and other crystallographic characteristics may be observed.
Glossary of geology american geosciences institute. A good dictionary should be on the desk of every geologist and within easy reach. Information about foliation in the dictionary, synonyms and antonyms. Text book of geology by archibald geikie 1903 production of foliation. Information and translations of foliation in the most comprehensive dictionary definitions resource on the web. Below you will find example usage of this term as found in modern andor classical literature. Commonly a lineation lies in the plane of a foliation in the same rock. 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. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Foliated definition in the cambridge english dictionary.
Often this foliation is associated with diagenetic metamorphism and lowgrade burial metamorphism. 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 editors, scientific american, readers respond to is time an illusion. Schistosity, mode of foliation that occurs in certain metamorphic rocks as a consequence of the parallel alignment of platy and lathshaped mineral constituents. Foliation forms what mineral grains orient themselves in such a way that they create repetitive planar structures. A coarsegrained, foliated rock produced by regional.
Rock foliations and lineations are indistinct or lacking. Its eventual goal is to describe the classifying space for codlmenslon g foliated manifolds which has recently been constructed by. It frequently occurs during rock folding, with the foliation usually subparallel to the axial planes of the folds. Choose from 81 different sets of foliation flashcards on quizlet. Foliations synonyms, foliations pronunciation, foliations translation, english dictionary definition of foliations. Use our dictionary to check the spelling definitions of words. Geology the set of layers visible in many metamorphic rocks as a result of the. Its best observed on a surface perpendiculat to foliation layers, because one can see those multiple layers. Foliation may parallel original sedimentary bedding, but more often is oriented at some angle to it.
Intersection lineations are measured in relation to the two structures which intersect to form them. Foliation may be formed by realignment of micas and clays via physical rotation of the minerals within the rock. Noun geology a linear feature in rock, often structural. 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. Or, the ancient changes of the earth and its by charles lyell 1865. 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. Foliation definition of foliation by merriamwebster.
The layers are planar, and parallel but not necessarily to bedding 4 or cleavage 5. 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. Through this lesson, you will learn about the process of foliation and its different types. 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. In this paper, the notion of a distribution will be presented which makes it possible for in. The subjects of this dictionary are most of geological terms but there are many terms that. Foliation definition is the process of forming into a leaf. Fabric is used to describe the spatial and geometric relationships that make up the rock. Browse the amazon editors picks for the best books of 2019, featuring our favorite reads in more than a dozen categories. Geology the layered structure common to metamorphic rocks. Foliations definition of foliations by the free dictionary. Information and translations of foliation in the most comprehensive dictionary definitions resource on. The entire contents of the glossary of geology 5th edition, revised is available as a kindle or nook e book. Each layer may be as thin as a sheet of paper, or over a meter in thickness.
Foliation may be regional, manifesting itself over large areas, or local, related to shifts along tectonic displacements. 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. Each layer can be as thin as a sheet of paper, or over a meter in thickness. 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.
You can complete the definition of foliation given by the english definition dictionary with other english dictionaries. Petrotectonic analysis is used to study the rules of orientation and the rules for decoding the motions that cause the orientation. Look up foliation, foliate, or foliated in wiktionary, the free dictionary foliation may refer to. Foliation is exhibited most prominently by sheety minerals, such as mica or chlorite. A great affinity exists in foliation between terebinthace and sapindace foliation is especially characteristic of gothic architecture. Foliation definition, the act or process of putting forth leaves. The process of numbering consecutively the leaves of a book or manuscript. 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. Architecture decoration of an opening with cusps and foils, as in. Metamorphic rocks have been modified by heat, pressure, and chemical processes, usually while buried deep below earths surface. The most extreme form of contactmeta morphism has been reserved for the last part of this section. Proper usage and audio pronunciation plus ipa phonetic transcription of the word foliation. Geological observations on the volcanic islands and parts of south america by george brettingham sowerby, william lonsdale, edward forbes, charles darwin 1897. Search foliation and thousands of other words in english definition and synonym dictionary from reverso.
The word comes from the latin folium, meaning leaf, and refers to the sheetlike planar structure. Metamorphic rocks pictures of foliated and nonfoliated types. Foliation, a geometric device used to study manifolds. 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. 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 analogy is seen directly in three dimensions, by taking and. Definition of foliation from the collins english dictionary.
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