Infobox journal cover File Tapa1a.png discipline Geology , Earth sciences abbreviated title noeffect abbreviation ANDGEO language English, Spanish publisher SERNAGEOMIN country Chile publication history noeffect history 1974 present frequency 3 times a year from 2012 website http www.andeangeology.cl ISSN 0716 0208 eISSN 0717618x OCLC Andean Geology formerly Revista Geol gica de Chile is a scientific journal published by Servicio Nacional de Geolog a y Miner a , Chile s geology and mining agency. It contains articles that are published in the field of geology and related earth science s, primarily on issues that are relevant to South America , Central America and Antarctica with a particular focus on the Andes . ref name autores cite web title Instrucciones a Los Autores url http www.andeangeology.cl index.php revista1 about submissions work Andean Geology publisher SERNAGEOMIN accessdate 9 November 2011 ref The published articles include peer reviewed original and review scientific research papers. ref name autores The journal is published three times a year January, May and September in both English and Spanish. ref name autores References Reflist geology of Chile Use dmy dates date January 2012 Category Geology journals Category Chilean magazines Category Geology of Chile Category Publications established in 1974 Category Andes Category Spanish language journals Geology stub Chile stub ... more details
The geology of Oklahoma is characterized by Carboniferous rocks in the east, Permian rocks in the center and towards the west, and a cover of Tertiary deposits in the pan handle to the west. Cretaceous sediments are found in the south east. There are also some areas with older outcrops dating back to Cambrian , and even one area of Precambrian igneous rocks. Source http www.ogs.ou.edu earthscience intgeol index.php Oklahoma Geological Survey U.S. Geological Survey Oklahoma Digital Geologic Map Database http pubs.usgs.gov of 2003 ofr 03 247 OK map.pdf 19 MB . United States topic title Geology of the United States by political division prefix Geology of Category Geology of Oklahoma US geology stub ... more details
Greenland is the largest island on Earth . Only one fifth of its surface area is exposed bedrock , the rest being covered by ice . The exposed surface is approximately 410,000 km sup 2 sup . Its geology is dominated by crystalline Rock geology rocks of the Precambrian Shield . ref name geus http www.geus.dk program areas raw materials greenl map greenland gr map anhstart uk.htm Greenland Geology. Geological Survey of Denmark and Greenland . 20 June 2003 retrieved 26 Dec 2010 ref There are large deposits of Rare earth element rare earth oxides at Kvanefjeld . See also Gemstone industry in Greenland Notes reflist Category Geology of Greenland Greenland stub regional geology stub no Gr nlands geologi ... more details
Image Striation fault.jpg thumb Striations observed in Peloponnese , Greece . Image PySlick.JPG thumb left Slickenside striations on a Pyrite coated fault surface In geology, a striation means linear furrows generated from Fault geology fault movement The striation s direction reveal the movement directions in the fault plane. Similar striations can occur with glaciation . Striations can also be a growth pattern shown on certain faces of certain minerals. Minerals that can include growth striations include Pyrite , Feldspar , Quartz , Tourmaline , and Sphalerite . See also Glacial striation DEFAULTSORT Striation Geology Category Geology geology stub ... more details
File Tibetan rocky land.JPG thumb 300px Tibet an rocky land, likely a result of combined eduction and erosion . In geology, eduction is a process in which the Earth crust spreads sideways, exposing deep seated rocks. It is prominent in middle layers of the Himalayas , where gravity pushes the mountains down. Together with a high grade of erosion, this activity brings deep rocks to the surface, many from more than a depth of 100 km. The unusually fast elevation preserves rare metastable minerals , e.g. diamonds and coesite . ref http geology.about.com od structureslandforms a tibetanplat.htm The Tibetan Plateau By Andrew Alden, About.com. Retrieved on April 12, 2009 ref See also Desert pavement , describing other forms of surface rock formation. References reflist DEFAULTSORT Eduction Geology Category Geology Category Geology terminology geology stub ... more details
Cape Geology coord 77 0 S 162 32 E source GNIS is a low, gravel covered point marking the western limit of Botany Bay Victoria Land Botany Bay , in the south part of Granite Harbour , Victoria Land , Antarctica. It was charted and named by the Western Geological Party of the British Antarctic Expedition, 1910 13 , who established their base here. ref name gnis References Reflist refs ref name gnis cite gnis type antarid id 5588 name Geology, Cape accessdate 2012 04 19 ref usgs gazetteer id 5588 name Geology, Cape DEFAULTSORT Geology, Cape Category Headlands of Victoria Land Category Scott Coast ScottCoast geo stub no Cape Geology ... more details
unreferenced date February 2012 In planetary geology , the word mensa pl. mensae is used to refer to a large mesa like area of raised land. gallery File Ganges Mensa.jpg Ganges Mensa , as seen by HiRISE . Ganges Mensa is found in the Coprates quadrangle of Mars . File Capri Mensa.JPG Capri Mensa , as seen by HIRISE. Click on image to see buttes and layers. Capri Mensa is found in the Coprates quadrangle of Mars . gallery Category Planetary geologyGeology stub fr Mensa Mars it Mensa esogeologia ... more details
World geologic provinces In geology, a platform is a continental area covered by relatively flat or gently tilted, mainly sediment ary stratum strata , which overlie a basement geology basement of consolidated igneous or metamorphic rocks of an earlier deformation. Platforms, Shield geology shields and the Basement geology basement rocks together constitute craton s. See also List of shields and cratons Carbonate platform References Parker, Sybil P. Ed. . 1997. McGraw Hill Dictionary of Geology and Mineralogy . New York McGraw Hill. Category Cratons Category Plate tectonics geology stub cs Platforma geologie de Deckgebirge et Platvorm geoloogia fr Plate forme g ologie it Tavolato he nl Platform tektoniek ja no Plattform geologi pl Platforma geologia sk Tabu a geol gia sr uk vi N n a ch t zh ... more details
University in St. Louis . See also Geology of Mercury Geology of Venus Geology of the Moon Geology of Mars Geology of Callisto Geology of Europa Geology of Ganymede Io moon Structure Geology of Io Geology of Titan Geology of Triton Pluto Composition Geology of Pluto References cite book ... Category Space science Category Planetary geology ca Astrogeologia de Astrogeologie es Astrogeolog a ... more details
In geology , drift is the name for all material of glacial origin found anywhere on land or at sea ref Press, F., and R. Siever, 1986, Earth, 4th ed., W.H.Freeman and Company, NY, p. 248 ref , including sediment and large rocks glacial erratic . Glacial origin refers to erosion, transportation and deposition by glaciers . In the UK the term drift is commonly used to describe any Deposition geology deposits of Quaternary age. The Driftless Area refers to an unglaciated portion of North America devoid of the glacial drift of surrounding regions. References references Category Geology Category Driftless Area Geology stub de Geschiebe no L smasseavsetning ... more details
Unreferenced auto yes date December 2009 Head describes Deposition geology deposits at the very top of the Succession geology geological succession , that could not be classified more accurately. The term has been used by British geologists since the middle of the 19th century. Areas identified as head include deposits of Aeolian processes aeolian origin such as blown sand and loess , slope deposits such as Gelifluction gelifluctates and Solifluction solifluctates , and recently eroded soil material, called colluvium . With geologists becoming more interested in studying the near surface environment and its related processes, the term head is becoming obsolete. DEFAULTSORT Head Geology Category Geochronology Geology stub ... more details
Image Florida Platform.jpg thumb right The structure of the Florida platform, the foundation of which came from the African plate over 200 million years ago During the early Mesozoic Era 251 65.5 mya unit mya the supercontinent of Pangea began to rift and break apart. As North America separated from Africa a small portion of the African plate detached and was carried away with the North American plate . This provided some of the foundation upon which Florida now rests. ref cite web url http www.dep.state.fl.us geology geologictopics geohist 2.htm title Florida s Geologic History author Means,Guy H. publisher Florida Dept. of Environmental Protection date August 30, 2010 accessdate August 12, 2011 ref References reflist United States topic title Geology of the United States by political division prefix Geology of Category History of Florida Category Geology of Florida Florida stub geology stub ... more details
Infobox journal title Geology cover image geology journal.jpg editor discipline Geology peer reviewed language English language English abbreviation Geol. publisher Geological Society of America country United States frequency 12 year history 1973 present openaccess license impact impact year website http geology.geoscienceworld.org link1 http geology.geoscienceworld.org archive link1 name Archives link2 link2 name RSS atom JSTOR OCLC LCCN CODEN ISSN 0091 7613 eISSN 1943 2682 boxwidth Geology is a publication of the Geological Society of America GSA . The GSA claims ref name Additional information cite web url http www.gsajournals.org gsaonline ?request get moreinfo&issn 0091 7613 title Additional information Geology year 2006 publisher Geological Society of America accessdate 2006 05 27 also states ISSN ref that it is the most widely read scientific journal in the field of earth science . It is published monthly, with each issue containing 20 or more Article publishing articles , and an annual total of 1166 pages. One of the goals of the journal is to provide a forum for shorter articles and less focus on pure academic research type articles. See also List of scientific journals List of scientific journals in earth and atmospheric sciences External links http www.gsajournals.org gsaonline ?request get archive&issn 0091 7613 Archives http www.gsajournals.org gsaonline ?request get current toc&issn 0091 7613 Table of contents for current edition with freely available abstract summary abstracts for current articles References reflist sci journal stub geology stub Category Geology journals Category Monthly journals Category Publications established in 1973 Category English language journals es Geology sv Geology ... more details
File Muzeum Z ota w Z otoryi fyllit Panenska H rka 21.07.2011 p.jpg thumb right 265px Phyllite showing cleavage Fissility refers to the property of Rock geology rock s to split along planes of weakness into thin sheets. ref http books.google.co.uk books?id voakD8HV9DgC&pg PA92&lpg PA92&dq fissility&source bl&ots b818afMe2r&sig yFStYNTyUSEUSsfdqLBKwiEZNoE&hl en&ei bDm3Su cH9eN4gaGirV8&sa X&oi book result&ct result&resnum 10 v onepage&q fissility&f false Tucker , M.E. 2001. Sedimentary petrology an introduction to the origin of sedimentary rocks, WileyBlackwell, 3rd Edition, 272pp. ref This is commonly observed in shale s, which are sedimentary rock s, and in slate s and phyllite s, which are foliation geology foliated metamorphic rock s. The fissility in these rocks is caused by the preferred alignment of platy phyllosilicate grains due to Compaction geology compaction , deformation or new mineral growth. ref http bulletin.geoscienceworld.org cgi content abstract 64 8 869 Ingram, R.L. 1953. Fissility of mudrocks, GSA Bulletin, 64, 869 878. ref A highly fissile rock splits easily along the Cleavage geology cleavage . ref Chattanooga Shale The shale is highly fissile easily cleaved most often black but may be brown where weathered. Anderson, Carl 1976 http www.caves.org survey gss GSSWebsite Report Caves files gssrck.pdf Index and Short Description to the Geologic terms used by the GSS Georgia State Base Geologic Map page 5 archived http web.archive.org web 20110703215343 http www.caves.org survey gss GSSWebsite Report Caves files gssrck.pdf here by Internet Archive on 3 July 2011 ref See also Cleavage geology Fabric geology References Reflist DEFAULTSORT Fissility Geology Category Structural geology geology stub ca Fissilitat geologia ... more details
Image INDONESIA geology map.jpg thumb 450px Geologic map This is a brief summary of the geology of Indonesia . Tectonics The tectonics of Indonesia are very complex, as it is a meeting point of several tectonic plate s. Indonesia is located between two continental plates the Eurasian Plate Sunda Shelf and Australian Plate Sahul Shelf and between two oceanic plates the Philippine Sea Plate and Pacific Plate . The Indian oceanic plate subduction subducts beneath the Eurasian continental plate formed the volcanic arc in western Indonesia. This chain of active volcanoes formed Sumatra , Java , Bali and Nusa Tenggara islands. The Pacific and Australian plate movements controlled the tectonic of eastern portion of Indonesia. Structural Geology The tectonics processes in Indonesia formed major structures in Indonesia. The most prominent fault in the west of Indonesia is the Semangko Fault , a dextral strike slip fault along Sumatra Island. The formation of this fault zone is related to the subduction zone in the west of Sumatra. Palu Koro fault is another major structural feature formed in the central part of Indonesia. This fault has similar orientation as the Semangko fault, extend from Koro in central part of Sulawesi , to Palu in the west coast of Sulawesi and extend across the Makassar strait to East Kalimantan . Stratigraphy The stratigraphy of the western part of Indonesia is relatively young, ranging in age from Paleogene to Quaternary . Eastern Indonesia has older stratigraphy compared to the western part. The stratigraphy ranges from Triassic to Tertiary . Devonian limestone ... of the Geology of Indonesia, Indonesian Geologists Association publication. Bemmelen, R. W. van Reinout Willem van The Geology of Indonesia The Hague Govt. Printing Office, 1949. 2 volumes. External links Wikibooks http en.wikibooks.org wiki The Geology of Indonesia Asia topic Geology of Category Natural history of Indonesia Category Geology of Indonesia regional geology stub uk ... more details
In geology , the terms basement and crystalline basement are used to define the rocks below a sedimentation sedimentary platform geology platform or cover, or more generally any rock below sedimentary rock s or sedimentary basin s that are metamorphic rock metamorphic or Igneous rock igneous in origin. In the same way the sediment s and or sedimentary rocks on top of the basement can be called a cover or sedimentary cover . Usage In a discussion of Europe an geology, the basement generally refers to rocks older than the Variscan orogeny . Citation needed date September 2009 On top of this older basement Permian evaporite s and Mesozoic limestone s were deposited. The evaporites form a Strength of materials weak zone on which the harder stronger limestone cover was able to move over the hard basement, making the distinction between basement and cover even more pronounced. Citation needed date September 2009 In Andes Andean geology the basement refers to the Proterozoic , Paleozoic and early Mesozoic Triassic to Jurassic rock units as the basement to the late Mesozoic and Cenozoic Andean sequences developed following the onset of subduction along the western margin of the South American Plate . ref Teresa Moreno, et. al., The geology of Chile, Geological Society of London, 2007, Ch. 2 Metamorphic and Igneous Basement Complexes, p. 5, ISBN 978 1862392205 ref When discussing the Trans Mexican Volcanic Belt of Mexico the basement include Proterozoic, Paleozoic and Mesozoic age rocks ... A. Alaniz lvarez and Angel F. Nieto Samaniego, eds., Geology of M xico, Geological Society of America ... in disciplines of geology like Sedimentary basin basin geology , sedimentology and petroleum geology ... See also Craton platform geology Platform Shield geology Shield References Reflist Parker, Sybil P. Ed. . 1997. McGraw Hill Dictionary of Geology and Mineralogy. New York McGraw Hill. Bates, Robert L ... Basement Geology Category Cratons Category Plate tectonics Category Stratigraphy Category Geology ... more details
Unreferenced stub auto yes date December 2009 image thrust system en.jpg thumb right 350px Schematic overview of a thrust system. The fault geology hanging wall block is when it has reasonable proportions called a nappe . If an erosion al hole is created in the nappe that is called a window. A klippe is a solitary outcrop of the nappe in the middle of autochthonous material. A tectonics tectonic window or Fenster lit. window in German language German is a geology geologic structure formed by erosion or normal fault ing on a thrust fault thrust system. In such a system the rock mass fault geology hanging wall block that has been transported by movement along the thrust is called a nappe . When erosion or normal faulting produces a hole in the nappe where the underlying autochthonous i.e. un transported rocks outcrop crop out this is called a window. Windows can be almost any size, from a couple of meter s to hundreds of kilometer s. wiktionary autochthonous DEFAULTSORT Window Geology Category Structural geology Category German words and phrases Geology stub de Fenster Geologie es Ventana tect nica fr Fen tre g ologie it Finestra tettonica nl Venster geologie nds Finster Geologie pl okno tektoniczne ... more details
processes. S fabric a planar fabric such as Cleavage geology cleavage or Foliation geology foliation ... fabric such as mineral stretching Lineation geology lineation where aggregates of recrystallised grains ... References Reflist See also Rock microstructure Texture geology Orientation tensor DEFAULTSORT Fabric Geology Category Geology de Gef ge Geologie it Fabric geologia nl Maaksel ... more details
In geology , a palimpsest is a geographical feature composed of superimposed structures created at different times. Palimpsest is beginning to be used by glaciology glaciologists to describe contradicting glacial flow indicators, usually consisting of smaller indicators i.e., striae overprinted upon larger features i.e., stoss and lee topography, drumlins, etc . See also Palimpsest planetary astronomy Palimpsest disambiguation Category Glaciology Category Geology zh ... more details
In ore deposit geology , supergene processes or enrichment occur relatively near the surface. Supergene processes include the predominance of meteoric water circulation with concomitant Redox oxidation and chemical weathering . The descending meteoric waters oxidize the primary hypogene sulfide ore minerals and redistribute the metallic ore elements. Supergene enrichment occurs at the base of the oxidized portion of an ore deposit. Metals that have been leached from the oxidized ore are carried downward by percolating groundwater, and react with hypogene sulfides at the supergene hypogene boundary. The reaction produces secondary sulfides with metal contents higher than those of the primary ore. This is particularly noted in copper ore deposits where the copper sulfide minerals chalcocite , covellite , digenite , and djurleite are deposited by the descending surface waters. References Guilbert, John M. and Charles F. Park, Jr 1986 The Geology of Ore Deposits , W. H. Freeman, ISBN 0 7167 1456 6 Category Economic geologygeology stub th ... more details
Image Millook cliffs enh.jpg right thumb 300px Chevron folds with flat lying axial planes, Millook Haven, North Cornwall, UK About folds in rock layers deposits of sediment across the earth s surface Chevron land form A chevron in geology refers to a chevron shaped Fold geology fold in stratum layers. Chevron folds are generally close to tight interlimb angles 70 to 10 degrees with straight limbs and small angular hinges. They typically form in multilayers, consisting of regular alternations of beds with contrasting mechanical properties e.g. sandstones and mudstones. External links http mouser.org gallery ny roadcut chevron A chevron at a road cut http www.skidmore.edu jthomas JJT 20Home 20Page Texas 202005 Texas 20Web 20Pictures 202005 24 20OOR, 20Chevron 20Folds, 20Tinaja 20Rd.jpg Chevron in Texas Category Structural geology geology stub ... more details
Blackrock is a type of limestone , with its name originating from a place in Somerset where it occurs. It is not always necessarily black, often a dark grey color. See also List of types of limestone Category Limestone Category Geology of Somerset petrology stub ... more details
About the geological term other uses Xenomorph disambiguation Distinguish2 Xenolith Unreferenced date December 2009 File Quarz xenomorph.JPG thumb 220px Xenomorph of quartz crystals grey in granite . A xenomorph also allotriomorph is a mineral that did not develop its otherwise typical external Crystal Geology crystal form because of late crystallization between earlier formed crystals. Xenomorphs are typical of Matrix geology matrix minerals in rapidly crystallizing volcanic lava s and shallow igneous intrusions. It is also typical of the interstitial or cementing minerals formed during the diagenesis of sedimentary rocks . The opposite is an idiomorph in which the external form is controlled only by the internal crystal structure . DEFAULTSORT Xenomorph Geology Category Mineralogy Category Petrology Petrology stub de Xenomorph fr X nomorphe min ralogie nl Anhedrisch nds Xenomorph pl Ksenomorfizm uk ... more details
dablink This article is about the geology of the European Alps . For the main article see geology of the Alps Geology of the Alps The Helvetic zone , Helvetic system or the Helveticum is a geology geologic subdivision of the Alps. The Helvetic zone outcrop crops out mainly in Switzerland , hence the name derived from Helveticus Latin for Swiss . Rocks in the Helvetic zone are sedimentary rock sedimentary and were originally sedimentation deposited at the southern continental margin margin of the Europe European plate . The Helvetic zone correlation correlates with the France French Dauphinois zone , French geologists often prefer the French name but normally this is considered the same thing. Occurrence In Switzerland the Helvetic zone is found in outcrops on the northern side of the Alpine mountain ranges. The French Alps consist mainly of Helvetic Dauphinois material. In Germany and Austria the Helvetic nappes crop out as a narrow band. Subdivision The Helvetic zone consists of a number of tectonics tectonically very different units. The Helvetic nappes are a nappe stack that was thrusted over the molasse of the Molasse basin in the Alpine foreland . They are composed of Mesozoic Marine ocean marine limestone , marl s and shale s. The Helvetic nappes are completely Decollement detached from their former basement geology basement . The Helvetic nappes are thrusted over the Infrahelvetic complex in eastern Switzerland. The Infrahelvetic complex is composed of wiktionary autochthonous autochthonous Mesozoic sediments on top of Hercynian orogeny Hercynian basement rock. The Mesozoic ... deformation geology deformed by thrusting and Fold geology ffold ing that continues into the Hercynian ... from the west the hard competency geology competent crystalline rock crystalline rocks of these external ... Members Schmid alps schmid html Text Schmid.html Geology of the western and central Alps, website of S.M. Schmid Category Geology of the Alps Category Structural geology Category Geology of Switzerland ... more details
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