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Encyclopedia results for Striation

Striation





Encyclopedia results for Striation

  1. Striation

    Striations means a series of ridges , furrows or linear marks, and are used in several ways Glacial striation Striation geology , a striation as a result of a geological Fault geology fault In medicine, striated muscle Striations can be found in certain Glass glasses . These have been caused by turbulent flow during teeming pouring of the glass. Striations can be observed in clouds . See Barber s pole . dab ...   more details



  1. Striation (geology)

    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



  1. Striation Valley

    Orphan date December 2010 Striation Valley coor dm 70 53 S 68 23 W is a valley trending southeast to George VI Sound , north of Jupiter Glacier , Alexander Island . Surveyed by a field party from the Department of Geography, University of Aberdeen, Scotland, with British Antarctic Survey BAS support, 1978 79. The name derives from glacial striations found on rocks in the valley. usgs gazetteer Category Valleys of Antarctica WAntarctica geo stub ...   more details



  1. Glacial striation

    File Glacial striation 21149.JPG thumb right Glacial striations at Mount Rainier National Park Image Glacial grooves.jpg thumb right 250px Glacial grooves stemming from the Wisconsin glaciation at Kelleys Island, Ohio Glacial striations or glacial grooves are scratches or gouges cut into bedrock by process of glacial Abrasion geology abrasion . Glacial striations usually occur as multiple straight, parallel grooves representing the movement of the sediment loaded base of the glacier. Large amounts of coarse gravel and boulders carried along underneath the glacier provide the abrasive power to cut the grooves, and finer sediments also in the base of the moving glacier further scour and polish the bedrock. Most glacial striations were exposed by the retreat of glaciers since the Last Glacial Maximum or the more recent Little Ice Age . As well as indicating the direction of flow of the glacial ice, the depth and extent of weathering of the gouges may be used to estimate the duration of post glacier exposure of the rock. An extreme example of glacial striations can be found at the Glacial Grooves at Kelleys Island, Ohio a National Natural Landmark , the most impressive of which is convert 400 ft m long, convert 35 ft m wide, and up to convert 10 ft m deep. These grooves cut into the Columbus Limestone . External links Commons inline http www.ohiohistory.org places glacial Ohio Historical Society Glaciology stub Geology stub Category Glaciology Category Erosion cs Souvek da Skurestribe de Kritzung is sr kir it Striatura glaciale nl Gletsjerkras no Skuringsstriper ru sv Isr fflor uk ...   more details



  1. Noetiidae

    Taxobox name Noetiidae image Striarca lactea 001.jpg image caption Striarca lactea regnum Animal ia phylum Mollusca classis Bivalvia subclassis Pteriomorpha ordo Arcoida familia Noetiidae familia authority Stewart, 1930 subdivision ranks Genera subdivision See text Noetiidae is a Family biology family of bivalve s related to the ark clam s. They are differentiated from the ark clams by the presence of striation s on the hinge ligament . They usually grow to around 6 cm in length, with 10 cm the maximum. Species Arcopsis small Koenen, 1885 small Arcopsis adamsi Small Dall, 1886 small Arcopsis fossularca Arcopsis gabinarca Arcopsis mulinarca Arcopsis ribriarca Arcopsis scapularca Arcopsis solida Arcopsis spinearca Arcopsis verilarca Noetia small Gray, 1857 small Noetia alssoni Noetia bisulcata Noetia delgada Noetia lindae Noetia ponderosa small Say, 1822 small Noetia reversa Noetiella Noetiella congoensis Rectangularca Scapularca Scelidionarca Sheldonella Sheldonella barbatiella Sheldonella didimacar Sheldonella minutalis Sheldonella paranoetia Stenocista Stenocista gambiensis Striarca Striarca afra Striarca breviarca Striarca estellacar Striarca galactella Striarca lactea Striarca pectunculiformis Trigonodesma Trinacria bivalve Trinacria Verilarca Verilarca sinensis References Wikispecies Noetiidae Category Noetiidae bivalve stub fr Noetiidae ...   more details



  1. Outer nuclear layer

    Infobox Anatomy Name Outer nuclear layer Latin stratum nucleare externum retinae GraySubject 225 GrayPage 1016 Image Gray881.png Caption Section of retina . Outer nuclear layer labeled at right, fourth from the bottom. Image2 Gray882.png Caption2 Plan of retinal neurons. Outer nuclear layer labeled at left, third from the bottom. System Precursor MeshName MeshNumber DorlandsPre l 05 DorlandsSuf 12480791 The outer nuclear layer or layer of outer granules or external nuclear layer , is one of the layers of the vertebrate retina , the light detecting portion of the eye. Like the inner nuclear layer , the outer nuclear layer contains several strata of oval nuclear bodies they are of two kinds, viz. rod and cone granules, so named on account of their being respectively connected with the rods and cones of the next layer. Rod granules The spherical rod granules are much the more numerous, and are placed at different levels throughout the layer. Their nuclei present a peculiar cross striped appearance, and prolonged from either extremity of each cell is a fine process the outer process is continuous with a single rod of the layer of rods and cones the inner ends in the outer plexiform layer in an enlarged extremity, and is imbedded in the tuft into which the outer processes of the rod bipolar cells break up. In its course it presents numerous varicosities. Cone granules The stem like cone granules, fewer in number than the rod granules, are placed close to the membrana limitans externa, through which they are continuous with the cones of the layer of rods and cones. They do not present any cross striation, but contain a pyriform nucleus, which almost completely fills the cell. From the inner extremity of the granule a thick process passes into the outer plexiform layer, and there expands into a pyramidal enlargement or foot plate, from which are given off numerous fine fibrils, that come in contact with the outer processes of the cone bipolars. External links BUHistology 0 ...   more details



  1. Abrasion (geology)

    Unreferenced date November 2006 Image Glacial abrasion ss 2006.jpg thumb Glacier Glacially abraded rock geology rocks in western Norway near Jostedalsbreen glacier. Abrasion is the mechanical scraping of a rock surface by friction between rocks and moving particles during their transport by wind , glacier , wave s, gravity , running water or erosion. After friction, the moving particles dislodge loose and weak debris from the side of the rock. These particles can be dissolved in the water source. The intensity of abrasion depends on the hardness , concentration , velocity and mass of the moving particles. Abrasion platform Abrasion platforms are shore platforms where wave action abrasion is a prominent process. If it is currently being fashioned, it will be exposed only at low tide, but there is a possibility that the wave cut platform will be hidden sporadically by a mantle of beach shingle the abrading agent . If the platform is permanently exposed above the high water mark, it is probably a raised beach platform, which is not considered a product of abrasion. See also Erosion Glacial striation Sedimentary Weathering DEFAULTSORT Abrasion Geology Category Sedimentology Category Glaciology bn bg cs Abraze da Abrasion de Korrasion et Abrasioon geoloogia es Abrasi n eu Abrasio hr Abrazija id Abrasi it Corrasione ka kk ht Abrazyon jewoloji lt Abrazija geologija nl Abrasie no Abrasjon nn Abrasjon pl Korazja ro Abraziune geologie ru sah sl Abrazija geologija sh Abrazija fi Abraasio geologia sv Abrasion tk Abrazi a uk zh ...   more details



  1. Abax (genus)

    DISPLAYTITLE Abax genus Taxobox name Abax image Abax.parallelepipedus.jpg image width 240px image caption Abax parallelepipedus regnum Animal ia phylum Arthropod a classis Insect a ordo Beetle Coleoptera familia Carabidae subfamilia Harpalinae tribus Pterostichini genus Abax genus authority Bonelli, 1810 subdivision ranks Species subdivision See text Abax is a genus of Carabidae carabid beetle s ref http tolweb.org Abax 51655 2006.07.07 Abax Bot generated title ref . There are approximately 100 mostly holarctic species and subspecies in this genus ref http zipcodezoo.com ZipcodeZoo Bot generated title ref . These beetles are mostly glossy black with parallel striation on elytra . They are carnivorous . Species Image Abax.carinatus. .calwer.06.04.jpg thumb 250px right A. carinatus Col begin width auto Col break Abax alabamae Abax arerae Abax alabamensis Abax alternans Abax approximatus Abax arerae Abax alpigradus Abax beckenhauptii Abax baenningeri Abax blatchleyi Abax brevoorti Abax carinatus Abax constrictus Abax continuus Abax convivus Abax ecchelii Abax engelmanni Abax exaratus Abax faber Abax fiorii Abax floridensis Abax furtivus Abax gravesi Abax gravidus Abax hermandensis Abax heros Abax hypherpiformis Abax incisus Abax iowensis Abax iuvenis Abax laevipennis Abax levifaber Abax macrovulum Abax morio Abax nonnitens Abax oblongus Abax obsoletus Abax ovalis Abax ovulum Abax parafaber Abax parallelepipedus Abax ater Abax parallelus Abax parasodalis Abax pilleri Abax pyrenaeus Abax sallei Abax schueppeli Abax seximpressus Abax sigillatus Abax sinus Abax sodalis Abax springeri Abax spoliatus Abax teriolensis Abax teriolensis Abax texensis Abax torvus Abax unicolor Abax vinctus Abax whitcombi Col end References Reflist DEFAULTSORT Abax Genus Category Carabidae Carabidae stub de Abax es Abax animal fr Abax it Abax no Abax ru Abax vi Abax genus ...   more details



  1. Can-Am United Floorball Club

    next two matches against Toronto Floorball League clubs iMove Blue Collars and Striation Six Striators ... , Canada Cup Floorball Championship Can Am United FC vs. Striation Six Striators ref Following ... center 8 center bgcolor E6E6FA Flag icon Ontario Striation Six Striators Striation Six center 1 ...   more details



  1. Glacial motion

    glacial landforms erosional landforms such as Wiktionary striation striation s, cirque landform ...   more details



  1. Ventifact

    Ventifacts are rock geology rocks that have been abraded, pitted, etched, grooved, or polished by wind driven sand or ice crystals. These geomorphic features are most typically found in arid environments where there is little vegetation to interfere with aeolian processes aeolian particle transport, where there are frequently strong winds, and where there is a steady but not overwhelming supply of sand. Ventifacts can be abraded to eye catching natural sculptures. In moderately tall, isolated rock outcrops, mushroom shaped pillars of rock may form as the outcrop is eroded by Saltation geology saltating sand grains. This occurs because, even in strong winds, sand grains can t be continuously held in the air. Instead, the particles bounce along the ground, rarely reaching higher than a few feet above the earth. Over time, the bouncing sand grains can erode the lower portions of a ventifact, while leaving a larger less eroded cap. The results can be fantastic stone mushrooms. Individual stones, such as those forming desert pavement , are often found with grooved, etched, or polished surfaces where these same wind driven processes have slowly worn away the rock. When ancient ventifacts are preserved without being moved or disturbed, they may serve as a paleo wind indicators. The wind direction at the time the ventifact formed will be parallel to grooves or striation s cut in the rock. gallery widths 200px image Mendenhall 1905 USGS.jpg Schist boulder pitted by sand blast near Palm Springs Station, Colorado Desert. Riverside County, California Mendenhall, 1905 ref U.S. Geological Survey Photographic Library http libraryphoto.cr.usgs.gov ref Image VentifactMojaveDesert031511.jpg Ventifact from the Mojave Desert near Barstow, California. image Ventifact at Ventifact Ridge in Death Valley.jpg Ventifact at Ventifact Ridge in Death Valley Mayer, 2003 Image Bradley 1930 dreikanter.jpg Granite stone polished by windblown sand, Sweetwater County, Wyoming Bradley, 1930 ref U.S. G ...   more details



  1. Hübnerite

    Infobox mineral name Hubnerite boxwidth boxbgcolor image Hubnerite.jpg imagesize alt caption Hubnerite from Cerro de Pasco, Peru category Oxide minerals formula MnWO sub 4 sub strunz 04.DB.30 dana symmetry unit cell molweight color reddish brown to black colour habit system monoclinic twinning cleavage Perfect on 010 fracture irregular uneven tenacity mohs 4 4 luster submetallic streak diaphaneity transparent to translucent gravity 7.12 7.18 density polish opticalprop refractive birefringence pleochroism 2V dispersion extinction length fast slow fluorescence absorption melt fusibility diagnostic solubility impurities alteration other prop1 prop1text references var1 var1text var2 var2text var3 var3text var4 var4text var5 var5text var6 var6text H bnerite or hubnerite is a mineral consisting of manganese tungstate chemical formula MnWO sub 4 sub . It is the manganese endmember of the manganese iron wolframite solid solution series. It forms reddish brown to black monoclinic prism geometry prismatic submetallic crystals. The crystals are typically flattened and occur with fine striation geology striations . It has a high specific gravity of 7.15 and a Mohs hardness of 4.5. It is transparent to translucent with perfect cleavage. Refractive index values are n 2.170 2.200, n 2.220, and n 2.300 2.320. Typical occurrence is in association with high temperature hydrothermal vein deposits and altered granite s with greisen , granite pegmatite s and in alluvial deposits. It was first described in 1865 and named after the German mineralogist , Adolf Huebner . See also List of minerals List of minerals named after people References Refbegin http mineral.galleries.com minerals sulfates huebneri huebneri.htm mineral galleries http webmineral.com data Hubnerite.shtml webmineral.com http www.mindat.org min 1940.html Mindat data Refend File Hubnerite Quartz 243439.jpg left thumb H bnerite and Quartz, Huayllapon Mine, Pallasca Province , Peru. Click on image for more views of this s ...   more details



  1. Boreal Shield Ecozone (CEC)

    This article is about an ecozone . For the landform covering the same region, see Canadian Shield . The Boreal Shield Ecozone is the largest Ecozones of Canada ecozone in Canada . Formation Canadian Shield rock forms the nucleus of the North American continent. Other geology geological structures assumed positions around or on top of the Shield millions of years after it was formed. The Rocky Mountains are relative newcomers on the geological stage, having risen a mere 60 million years ago. Most Shield rocks were formed well over a billion years earlier, during the very first chapter of the planet s history known as the Precambrian era . What once may have been a towering mountain chain is today a great rolling plain of ancient bedrock . During the late Precambrian era, fierce convulsions in the Earth s crust geology crust resulted in a warped, collapsed Shield. The foundation of much of the ecozone is now metamorphic rocks metamorphic gneiss , a highly banded rock formed by intense pressure and heat. Many of the minerals that contribute to the Shield s economy may have formed during these geologically turbulent times. During the last ice age , which ended 10 000 years ago, the advance of glacier s continuously plucked and scoured the Boreal Shield, forming striation s in the bedrock and carrying large boulders many kilometers. In retreat, massive glaciers enveloped most of the landscape with great amounts of glacial deposits including gravel, sand, shale, and numerous sediments. The vast majority of inadequately drained depressions that were left behind, as well as natural faults in the bedrock, now form the millions of lakes, ponds and wetlands that give this ecozone its distinctive character. Changing conditions As for the boreal forest, fire suppression, insect control, clear cutting and single species tree farming are widespread. These practices may, over the long term, reduce the diversity of both plant and animal species and increase the forest s vulnerabilit ...   more details



  1. Inman Valley, South Australia

    Infobox Australian Place type town name Inman Valley state South Australia image SelwynsRock.jpg caption Glaciation Glaciated pavement in the Inman River lga City of Victor Harbor postcode 5211 est pop elevation maxtemp mintemp rainfall stategov fedgov dist1 86 dir1 South location1 Adelaide Inman Valley coord 35.499 S 138.456 E region AU SA type city display inline,title , is a valley, locality, and township on the Fleurieu Peninsula, around 86 km south of Adelaide . The valley is about 380 square kilometres in area. Origin of Name Inman Valley, and Inman River, was named through association with Inspector Henry Inman police commander Henry Inman , founder and first commander of the South Australia Police, who pursued two allegedly escaped convicts there in August 1838. ref Inman first commander of the SA Police Max Slee. Seaview Press, Adelaide 2010, pp 80 84 ref No Indigenous name is recorded for the valley itself, but two names are recorded for the river Moo oola and Moogoora. ref Cockburn, p106, and HM Cooper SA Museum ref The mouth was called Mugurank, meaning place of hammerstones . ref Manning, p.95 ref History The first recorded Europeans to sight the valley were likely the party that accompanied explorer Collet Barker but not Barker himself in 1831. In its pristine state the valley abounded in kangaroos, which were hunted for food by early sealers and whalers at Encounter Bay . Present day land use is predominantly grazing, dairy farming, forestry, and horticulture. The valley also attracts bushwalkers and tourists. ref The Inman Valley Story Adrian Lush Ambrose Press, 1971 ref Selwyns Rock In the valley is Selwyns Rock, a glaciation glaciated pavement in the bed of the Inman River. It was first described by, and named for, Alfred Richard Cecil Selwyn , who was Government of Victoria Victorian Government Geologist at the time. Glacial striation s on the polished surface indicate glacial movement to the north west. Boulder clay s, till ites, and Glacial erra ...   more details



  1. Microphysula cookei

    italic title Taxobox name Microphysula cookei image Microphysula cookei shell.jpg image caption shell of Microphysula cookei from its original description regnum Animal ia phylum Mollusca classis Gastropoda subclassis superordo ordo Pulmonata subordo Eupulmonata infraordo Stylommatophora superfamilia Helicoidea familia Thysanophoridae subfamilia genus Microphysula species M. cookei binomial Microphysula cookei binomial authority Henry Augustus Pilsbry Pilsbry , 1922 ref name Pilsbry Pilsbry H. A. October 1922. Description of a new Zonitoides . http www.archive.org details nautilus36amer The Nautilus, Volume 35 , number 2, pages http www.us.archive.org GnuBook ?id nautilus36amer 51 38 39, figure 1. ref synonyms Zonitoides cookei Pilsbry, 1922 Microphysula cookei , common name the Vancouver snail , is a species of air breathing land snail , a terrestrial animal terrestrial pulmonate gastropod mollusk in the family Thysanophoridae . Original description The species Microphysula cookei was originally described as Zonitoides cookei by Henry Augustus Pilsbry in 1922. ref name Pilsbry Pilsbry s original text the type description reads as follows Cquote Zonitoides cookei n. sp. Fig. 1. The gastropod shell shell is discoidal, the spire mollusc spire very slightly convex, Umbilicus mollusc umbilicus regularly diminishing inward, very nearly one fourth the diameter of the shell whitish, glossy, smoothish, under the microscope showing faint growth lines and on the upper surface an excessively minute, close and shallow spiral striation on the last 2 or 3 whorl mollusc whorls . The whorls increase slowly and are rather convex, the suture gastropod suture rather deeply impressed, body whorl last whorl rounded peripherally. The aperture mollusc aperture is rather narrow, crescentic. Height 1.7, diam. 3.6 mm. 4 math begin matrix frac 1 2 end matrix math whorls. Cameron Lake , Vancouver Island . Type no. 130623 Academy of Natural Sciences A. N. S. P. Specimens also contained in the B ...   more details



  1. Timeline of myocardial infarction pathology

    This table gives an overview of the pathology seen in myocardial infarction by time after obstruction. For the first 30 minutes no change at all can be seen by gross examination or by light microscopy in histopathology . However, in electron microscopy relaxed myofibrils, as well as glycogen loss and mitochondrial swelling can be seen. class wikitable Time Gross examination Histopathology br light microscopy 0 0.5 hours None None 0.5 4 hours None Glycogen Depletion, as seen with a PAS Stain Possibly waviness of fibers at border 4 12 hours Sometimes dark Mottle mottling Initiation of coagulation necrosis Edema Hemorrhage 12 24 hours Dark mottling Ongoing coagulation necrosis Karyopyknosis Hypereosinophilia of myocytes Contraction band necrosis in margins Beginning of neutrophil infiltration 1 3 days Infarct center becomes yellow Tan color tan Continued coagulation necrosis Loss of nuclei and Cardiac muscle Striation striations Increased infiltration of neutrophils to Interstitial fluid interstitium 3 7 days Hyperemia at border Softening yellow tan center Beginning of disintegration of dead muscle fibers Necrosis of neutrophils Beginning of macrophage removal of dead cells at border 7 10 days Maximally soft and yellow tan Red tan margins Increased phagocytosis of dead cells at border Beginning of granulation tissue formation at margins 10 34 days Red gray and depressed borders Mature granulation tissue with type I collagen ref Bishop JE, Greenbaum R, Gibson DG, Yacoub M, Laurent GJ. Enhanced deposition of predominantly type I collagen in myocardial disease. J Mol Cell Cardiol. 1990 22 1157 1165 ref 2 8 weeks Gray white granulation tissue Increased collagen deposition Decreased cellularity More than 2 months Completed scarring Dense collagenous scar formed colspan 3 font size 1 If not else specified in boxes, then reference is nr ref name Kumar11 2 Table 11 2 in cite book author Mitchell, Richard Sheppard Kumar, Vinay Abbas, Abul K. Fausto, Nelson title Robbins Basic P ...   more details



  1. Balanus

    Taxobox image Balanus glandula01.jpg image caption Balanus glandula with Chthamalus fissus regnum Animal ia phylum Arthropod a subphylum Crustacean Crustacea classis Maxillopoda infraclassis Barnacle Cirripedia ordo Sessilia familia Balanidae genus Balanus genus authority Emanuel Mendez da Costa Da Costa , 1778 subdivision ranks Species subdivision See text Image Balanus Yorktown Fm.jpg thumb right Balanus sp. from Carters Grove Bluffs outcrop of the Pliocene Yorktown Formation , growing on a bivalve Balanus is a genus of barnacle s in the family biology family Balanidae of the subphylum Crustacea . Balanus amphitrite is small about 1.5  cm diameter. The color is whitish with purple or brown longitudinal stripes. Surface of test plates are longitudinally ribbed. The interlocking tergum and scutum , the paired structures which cover the animal inside are as pictured below. B. amphitrite is a nonindigenous species to the Gulf of Mexico. A similar species, Balanus reticulatus Utinomi, commonly occurs with B. amphitrite . It also has longitudinal purple or brown stripes, but these stripes are intersected by horizontal grooves, giving the surface of the test plates a rough reticulated striation, unlike B. amphitrite . It can also be distinguished by examination of the tergum and scutum. Note the more sharply pointed apex of the tergum and the elongated and narrower tergum spur of B. reticulatus . It can be found in the intertidal fouling communities of harbors and protected embayments. The live attached to any available hard surface, including rocks, pier pilings, ship hull, oyster shells, and mangrove roots. Barnacles have specialized paired appendage s, called cirri , that they use as a scoop net, reaching out into the water and extracting food particles. When their cirri are drawn back, food is scraped off into the mouth. Species Balanus amphitrite amphitrite barnacle, little striped barnacle. Balanus aquila eagle barnacle Balanus balanus rough barnacle Balanus ca ...   more details



  1. Endless Mountains

    noref date June 2008 Image Map of PA Endless Mountains.gif 300px thumb Counties composing the Endless Mountains Region of Pennsylvania The Endless Mountains are a chain of mountains in northeastern Pennsylvania . The Endless Mountains region includes Bradford County, Pennsylvania Bradford , Sullivan County, Pennsylvania Sullivan , Susquehanna County, Pennsylvania Susquehanna , Wayne County, Pennsylvania Northern Wayne , and Wyoming County, Pennsylvania Wyoming Counties. History and geography File Elkmountaintop.JPG left thumb Endless Mountains, as seen from Elk Mountain Ski Area Elk Mountain Part of the Appalachian Mountains chain, the region does not consist of true mountains, geology geologically speaking, but instead a dissected plateau that is part of the Allegheny Plateau . The Catskill Mountains are the highest expression of the plateau, located to the east of the Endless Mountains, and separated from them by the Delaware River . The current geography was slightly modified during the last ice age by the Wisconsin Glacier about 15,000 years ago. Glacial striation s can be found on the rock geology rocks of some of the high ridges, but the area was at the margin of the ice sheet, and the impact was much less than in New York just to the north. The mountains are made up of sedimentary rock s mostly sandstone and shale s, with a little conglomerate geology conglomerate that were part of a lowland that collected sediments erosion eroded from mountains to the southeast in Mississippian and Pennsylvanian geologic time. The area has been uplifted and lowered several times. The highest points are all nearly the same elevation, establishing that the area had once been eroded into a nearly level peneplane , which has since been uplifted. The present Susquehanna River established its meander ing course during that time, when it was a mature stream on a topography of very low relief. When the area was uplifted, the river s bends were preserved as incised meander s. The lar ...   more details



  1. Glacial landform

    Image SunapeeNH.jpg thumb right Antique postcard shows rocks scarred by glacial erosion. Image YosemiteFromPlane.JPG thumb Yosemite Valley from an airplane, showing the U shape Image PluckedGraniteAlandIslands.JPG thumb right Glacially plucked granitic bedrock near Mariehamn, land Islands . Glacial landforms are those created by the action of glacier s. Most of today s glacial landforms were created by the movement of large ice sheets during the Quaternary glaciation s. Some areas, like Fennoscandia and the southern Andes , have extensive occurrences of glacial landforms other areas, such as the Sahara , display very old fossil glacial landforms. Erosional landforms Image Arranque glaciar en.svg thumb Erosional landforms As the glaciers expanded, due to their accumulating weight of snow and ice , they crushed and scoured surface rock geology rocks and bedrock . The resulting erosional landforms include Glacial striations striation s, cirque landform cirques , glacial horn s, ar te s, trim line s, valley Glacial valleys U shaped valleys , roche moutonn e roches moutonn es , overdeepening s and valley Hanging valleys hanging valley s. Cirque Starting location for mountain glaciers U shaped valley U shaped valleys are created by mountain glaciers, called fjord when filled with ocean water, creating an inlet Depositional landforms Image Receding glacier en.svg thumb Depositional landforms Later, when the glaciers retreated leaving behind their freight of crushed rock geology rock and sand glacial drift , they created characteristic depositional landforms . Examples include glacial moraines , esker s, and kame s. Drumlin s and ribbed moraines are also landforms left behind by retreating glaciers. The stone walls of New England contain many glacial erratic s, rocks that were dragged by a glacier many miles from their bedrock origin. Esker Built up bed of an under glacier stream. Kame Irregularly shaped mound. Moraine Feature can be terminal at the end of a glacier or lat ...   more details



  1. Säynätsalo Town Hall

    and enlivened surface condition. The massive brick envelope is punctuated by periods of vertical striation ...   more details



  1. Elastic Rock

    Infobox Album See Wikipedia WikiProject Albums Name Elastic Rock Type Studio album Artist Nucleus Cover Released March 1970 Recorded 12 21 January 1970 at Trident Studios , London Genre Jazz fusion Length 40 46 Label Vertigo Records br 2007 Remaster Universal Records Producer Peter King Reviews Progarchives Rating 4 5 http www.progarchives.com album.asp?id 8693 link Allmusic Rating 4 5 Allmusic class album id r45796 pure url yes link Last album This album Elastic Rock br 1970 Next album We ll Talk About It Later br 1970 Elastic Rock is Nucleus band Nucleus first album and an essential creation in the crystallization of a new musical expression Jazz fusion . In July 1970 the group presented the innovative compositions from the LP album LP at the Montreux Jazz Festival , won the first prize and subsequently performed both at Newport Jazz Festival and at the Village Gate jazz club, paving the way for many other Jazz fusion ensembles that would appear in the 1970s. Track listing All tracks composed by Karl Jenkins except where indicated br 1916 1 11 Elastic Rock 4 05 Striation 2 15 Jeff Clyne , Chris Spedding Taranaki 1 39 Brian Smith Twisted Track 5 17 Chris Spedding Crude Blues, Part I 0 54 Karl Jenkins , Ian Carr Crude Blues, Part II 2 36 Ian Carr 1916 The Battle of Boogaloo 3 07 Torrid Zone 8 41 Stonescape 2 39 Earth Mother 5 15 Karl Jenkins, Ian Carr, John Stanley Marshall John Marshall , Jeff Clyne, Chris Spedding Speaking for Myself, Personally, in My Own Opinion, I Think... 0 54 John Marshall Persephones Jive 2 15 Ian Carr Personnel Karl Jenkins oboe , baritone saxophone , electric piano , piano Ian Carr trumpet , flugelhorn Brian Smith tenor saxophone , soprano saxophone , flute Jeff Clyne Double bass bass , bass guitar electric bass John Stanley Marshall John Marshall Drum kit drums , Percussion instrument percussion Chris Spedding acoustic guitar , electric guitar External links http www.allaboutjazz.com php article.php?id 15163 1 Nucleus at http www.allabout ...   more details



  1. Moss Island

    Image Moss Island potholes.jpg thumb Moss Island hanging Giants kettle pothole Moss Island in Little Falls city , New York Little Falls, New York is an igneous intrusion of Syenite in the Mohawk Valley with the Little Falls at one end. It became an island when locks were built so boats could avoid the 40 ft falls. It is known for its extremely large 40 50 ft Giant s kettle potholes ref http epod.usra.edu archive epodviewer.php3?oid 385824 Earth Science Picture of the Day Hanging Pothole on Moss Island ref as well as being popular with local rock climbers. It was declared a National Natural Landmark in May 1976 ref http www.nature.nps.gov nnl Registry USA Map States NewYork NNL MI index.cfm NPS NNL Summary ref There are ongoing efforts by the local community to turn Moss Island into a New York State Park. ref name lft http www.littlefallstimes.com archive x1001335460 SUNY ESF professors tour Moss Island Little Falls Times article regarding Moss Island ref Description Moss Island is 1500 feet long and 625 feet wide. ref name lft It is bordered by the Mohawk River on the north and the New York State Canal System NYS Barge Canal to the south. It is covered in dwarf oak trees. Glacial striation , also known as glacial scrapes, are visible in some places. History The potholes were created by huge volumes of water falling over a prehistoric cataract once located here, much like modern day Niagara Falls. At that time, perhaps 20,000 80,000 years ago, the Great Lakes drained through the Mohawk Valley Hudson River because the St. Lawrence River was blocked by glaciers. The first locks around the waterfall were created in 1793 ref name albany http www.albanyweblog.com 2008 08 Aug 08 08 08.php Visit to site ref A dry 19th century Eire Canal lock Enlarged Erie Canal Lock 36 is located next to the southeastern service road. The current Lock 17 is one of the tallest locks of its type in the world and the largest in the NYS Barge Canal system. The lock uses a guillotine gate on its ...   more details



  1. Carreg Cadno

    Carreg Cadno rock of the fox in English is a hill five miles northeast of Abercraf in the county of Powys , south Wales . It lies within the Brecon Beacons National Park and Fforest Fawr Geopark . Its summit at OS grid ref SN 874161 reaches a height of 538m 1763  ft above sea level. The hill is within the Ogof Ffynnon Ddu national nature reserve which is owned and managed by the Countryside Council for Wales . ref Ordnance Survey Explorer map OL12 Brecon Beacons National Park western area ref Geology The southern slopes of the hill are formed from the Marros Group Twrch Sandstone , a coarse quartzitic sandstone gritstone , formerly known as the Marros Group Basal Grit of the Millstone Grit Series, and laid down during the Namurian stage of the Carboniferous period . The northern slopes are formed from the underlying Carboniferous Limestone . The area displays various features typical of karst ic landscapes including hundreds of shakehole s in both the limestone and the gritstone areas. Substantial areas of gritstone country have foundered strata foundered as the underlying limestone has dissolved away and caverns have collapsed. There are also areas of both limestone pavement and gritstone pavement. The latter occasionally retain glacial striation striations on their polished upper surfaces due to scratching by stones embedded in the base of a moving icesheet during the last ice age some 18,000 years ago. There are also pockets of silica sand where the gritstone has been intensively weathered. An economically valuable deposit of silica sand was worked near Pwll Byfre for many years and transported by tramroad to make refractory brick s firebricks or silica bricks at the nearby Penwyllt Dinas Silica Brick Works. Ogof Ffynnon Ddu , Britain s deepest cave lies under the northern slopes of Carreg Cadno. The vertical interval between the sink of the Byfre Fechan stream at Pwll Byfre and its resurgence at Ffynnon Ddu is 300m 1000  ft. The national nature reserve h ...   more details



  1. Radiodiscus patagonicus

    and very faint spiral striation. The rotund lunate aperture mollusc aperture is slightly oblique ...   more details



  1. Caliphruria

    italic title Taxobox name Caliphruria subedentata image Caliphruria subedentata1CURTIS.jpg image width 270 px image caption Caliphruria subedentata regnum Plantae subregnum Tracheobionta divisio Magnoliophyta classis Liliopsida subclassis Liliidae ordo Asparagales familia Amaryllidaceae tribus Eucharideae genus Caliphruria genus authority William Herbert botanist Herb. ref Edwards s Bot. Reg. 30 87 1844 . ref subdivision ranks Species subdivision See text synonyms Leperiza small Herb. small nom. rejic . Collania small Josef August Schultes Schult. & Schult. small Pseudourceolina small Julio C sar Vargas Calder n Vargas small Caliphruria is a genus of herbaceous , perennial and bulbous plants in the Amaryllis family Amaryllidaceae . It consists of four species distributed in tropical regions of South America, three of them are endemic to Colombia. This genus is closely related with the genera Eucharis and Urceolina , all of them known as Amazon Lilies . The species of Caliphruria are infrequent in nature. Description Members of Caliphruria have petiolate leaves with a distinctive cuticular striation and white flowers with the shape of a funnel. The six tepal s are fused at their bases forming a straight perianth tube and the six stamen s of the androecium are more or less fused developing an staminal cup . Seeds are turgid, with a lustrous, usually black, testa. ref Meerow, Alan W. 1989. http www.jstor.org pss 2399347 Systematics of the Amazon Lilies, Eucharis and Caliphruria Amaryllidaceae . Annals of the Missouri Botanical Garden, Vol. 76, No. 1 1989 , pp. 136 220 ref Species The list of Caliphruria species, with their complete scientific name and authority, is given below. ref name RBG Royal Botanical Gardens, Kew. http apps.kew.org wcsp qsearch.do World Checklist of Monocotyledons Caliphruria . Accessed May 16 2009. ref Caliphruria hartwegiana small Herb. small , ref Edwards s Bot. Reg. 30 Misc. 87 1844 . ref distributed in North West Colombia . Caliphruria korsa ...   more details




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