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Topic: Trough (geology)

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Albuquerque's Environmental Story - A Pictorial History of Albuquerque Area Geology The geological history that led to the city's familiar mountain/valley/mesa trough shape is long and complex, extending hundreds of millions of years. Thus a huge grave-like trough called a "rift" is formed. The Rio Grande follows the rift zone depositing on its flood plain materials which add to the fertility of the alluvial materials eroded from the mountains. www.cabq.gov /aes/s1picgeo.html   (648 words)

Contributions to Zoology The orbits are deeply incised into anterior margin with two fossae, rimmed by granulate emarginations; the inner orbital fossa is set ahead of the outer fossa and is separated from it by a trough, bounded laterally by extraorbital and ventrally by suborbital spines. The inner orbital fossa is larger and bears spines on its lower and outer border, and has a suborbital drain or trough between. They are rimmed, and the inner orbital fossae is defined by a separate, tuberculate inner orbital ridge extending from edge of rostrum to the inner orbital septum. logos.uba.uva.nl /ctz/vol67/nr04/a02   (648 words)

The geology, crustal structure and evolution of the Rockall Trough and the Faroe - Shetland Channel. - Scrutton, Roger A.: The geology, crustal structure and evolution of the Rockall Trough and the Faroe - Shetland Channel. Title: The geology, crustal structure and evolution of the Rockall Trough and the Faroe - Shetland Channel. Publisher: Extracted from The Proceedings of the Royal Society of Edinburgh, Section B, 1986, on the Oceanography of the Rockall Channel. www.booksets.com /si/72987.html   (648 words)

UCMP Glossary: Geology The long, and fairly wide trough that has formed as a section of the Earth's crust has dropped down along faults, e.g., African Rift Valley in East Africa. A long, narrow crack in the entire thickness of the Earth's crust, which is bounded by normal faults on either side and forms as the crust is pulled apart; v. The area on continents where a trough bounded by normal faults is forming; the site of crustal extension, similar to that which occurs at mid-oceanic ridges; rift basin or rift valley- n. www.ucmp.berkeley.edu /glossary/gloss2geol.html   (3545 words)

AllRefer.com - rift valley (Geology And Oceanography) - Encyclopedia rift valley, elongated depression, trough, or graben in the earth's crust, bounded on both sides by normal faults and occurring on the continents or under the oceans. The development of a rift valley in a continent is believed to be a precursor to the breakup of the continent and the development of a new ocean basin by seafloor spreading. Rift valleys, such as the Red Sea and the African rift valleys, are commonly the sites of volcanism and the locus of much earthquake activity. reference.allrefer.com /encyclopedia/R/riftvall.html   (252 words)

SUBDIVISIONS OF THE MESOPROTEROZOIC YELLOWJACKET FORMATION AND HOODOO QUARTZITE, SALMON RIVER MOUNTAINS, CENTRAL IDAHO The 5th unit of rippled and mudcracked couplets, and the 6th, of reddish trough cross-bedded and laminated fine sandstone with uncracked silt to clay couplets, correlate with shallow-water, mud-cracked strata of the uppermost type Yellowjacket exposed north of Middle Fork Ranger Station. The overlying Hoodoo Quartzite is a cliff-forming heavy-mineral laminated feldspathic arenite. Above the Hoodoo is at least 150 m of medium to coarse arenite and siltite with hummocky couplets, plus gray microlaminated wavy siltite, with local calc-silicate pods at the base. gsa.confex.com /gsa/2002RM/finalprogram/abstract_34169.htm   (492 words)

Geoscience Australia: Lachlan Fold Belt Project (1991 - 2000) - 21 November 2001 A 1:250 000 scale basement geology interpretation of the geophysical data and previous outcrop mapping was released in 1999. The Jemalong Trough: An extension of Silurian-Devonian rifting in the eastern Lachlan Fold Belt. The package includes layers for outcrop geology, derived geology (interpretive pre-Tertiary geology, cross-sections, etc), geochemistry, site observation and structural data, petrology, and mineral occurrence, fossil, geochronology, and photographic databases. www.ga.gov.au /minerals/research/archive/lachlan_fold_belt.jsp   (1890 words)

Geology of Great Britain, UK - Introduction and maps This trough is fault-bounded, although the Highland Boundary Fault (to the north) and the Southern Uplands Fault (to the south) are not shown on this particular map. It is intended to provide introductory information on the geology of Great Britain to give the background and to facilitate understanding of the geology of the south coast. It is a classic map which shows amongst other features the geology of Tilgate Forest in the Weald, where the wife of Dr Mantell was the first person to discover the remains of a dinosaur. www.soton.ac.uk /~imw/Geology-Britain.htm   (1890 words)

Canin Plateau Geology EN The glacial trough morphology is cut by the V shaped young valley of Raccolana, which slopes in the opposite direction. The karst plateau, about 1,900 m high, accommodates numerous fractures, zsombolys (karst chambers with cupola opened up to the surface) and fracture shafts. South of the valley the Canin Plateau raises in steps reaching the highest point of 1,998 m at Col delle Erbe Mount. karst.planetresources.net /canin_plateau-geo.htm   (1365 words)

Marine and Petroleum Geology Research Group, UCD The Rockall trough is the largest of the basins lying to the west of Norway, UK and Ireland. Critical to the prediction of the petroleum habitat in the Rockall Trough is a detailed understanding of the formation of the basin as a whole. The project should help to develop a quantitative structural and stratigraphic model of the formation of the Rockall Trough. geomound.ucd.ie /htdocs/MPGRG/~html   (1365 words)

Geology A Meandering Stream Sequence in the Upper Hearth Formation, Big Snowey Trough, Central MT Passanisi, Denise M. Geology of the Doney-Willow Landslide Geology of the Williams Peak and SW Tarkio Quadrangles Surface Geology and Hydrogeology of the Southwest Quarter of the Florence Quadrangle www.umt.edu /geology/Undergraduates/theses.htm   (3218 words)

Geology Handout As the rift deepened those streams started following the north-south trough of the rift. The area surrounding the rift was unstable and subject to many earthquakes that formed deep cracks, called fissures. Its effects are standing tall on the western edge of Petroglyph National Monument—the Albuquerque volcanoes whose ancient flows gave birth to an extensive mesa and a jagged, boulder-strewn escarpment. www.nps.gov /petr/vc/sitebullitens/sbgeology.htm   (964 words)

Site 022 The landing site is located on Candor Mensa, a mesa in Candor Chasma, which is an east-west trending trough associated with Valles Marineris. Talus slopes sorrounding the base of Candor Mensa appear to be composed of landslide material derived from the steep canyon walls above. Although landing a spacecraft on the floor of the Valles Marineris may be too dangerous for the first sample-return mission to Mars, the scientific rewards would be so great that such a landing should be considered for later flights. cmex-www.arc.nasa.gov /MarsTools/Mars_Cat/Part_3/Sites/site022.html   (964 words)

MESOPROTEROZOIC STRATA SOUTHWEST OF SALMON IDAHO Tabular flat-laminated, planar and trough crossbedded fine- to coarse-grained feldspathic quartz sandstone of the overlying Hoodoo Formation records a large prograding and retreating alluvial fan complex (Revett correlative). The upward transition to small antidunes grading to current ripples and desiccation-cracked muddy layers above the Hoodoo (argillaceous quartzite of Ekren, 1988) probably records the return of sandflat environments, somewhat muddier than those of the type Yellowjacket. Along Iron Creek, south of Salmon, strata mapped as Apple Creek Formation (Ekren, 1988) contain flat-laminated sandstone correlative with the Hoodoo Quartzite overlain by hummocky siltite correlative with the Cobalt Yellowjacket Formation. gsa.confex.com /gsa/2001RM/finalprogram/abstract_6071.htm   (341 words)

Wallace A. Bothner Main interests - the geology of igneous and metamorphic rocks, metamorphic structural geology, and the combination of structural geology and potential field geophysics to model regional tectonics of the New England Appalachian Mountains, both on and offshore. Hussey, A. M., II, and Bothner, W. A., 1993, Geology of the Coastal Lithotectonic Belt, SW Maine and SE New Hampshire: in Cheney, J.T. and Hepburn, J. C., eds., Field Trip Guidebook of the Northeastern United States: 1993 Boston GSA, vol. Hussey, A. M., II, and Bothner, W. A., 1995, Geology of the Coastal Lithotectonic Belt, SW Maine and SE New Hampshire: in Hussey, A.M.,II, ed, New England Intercollegiate Conference Guidebook 1995, Bowdoin College. www.unh.edu /esci/bothner.html   (341 words)

Profile of Professor Robert Devoy Wheeler, A. and Devoy, R., 1997, Sediment transfer and shelf edge dynamics in the northern Rockall Trough. Wheeler, A. J., Hayes, C., van Weering, T., Devoy, R. and Hall, I. N., 1997, Depositional signals from the base of the continental slope: shelf edge sediment transfer and remobilisation in the northern Rockall Trough. 1999 (April), Wheeler, A. J., Weering, T. van, Hayes, C. P., Hall, I. and Devoy, R., 1999, Turbiditic and contouritic controls on sediment flux in the central northern Rockall Trough. www.ucc.ie /ucc/depts/geography/pages/staff/devoy_r.htm   (341 words)

MRT's homepage In the Vera basin we have been working on a unit of coarse, mixed siliciclastic-bioclastic deposits which at some localities display spectacular, large-scale trough cross-bedding. These deposits are thought to have accumulated in a tidally influenced strait that connected the Vera basin with the Sorbas basin to the west. Evidence of recycling of isotopically light CO2(aq) in stratified black shale basins: contrasts between the Whitby Mudstone and Kimmeridge Clay Formations, United Kingdom. www.uib.no /People/nglmt   (341 words)

Publications Gath, E.M., 1983, Bishop ash exposed in a road cut near Murrieta, California; in Steller, D.L., Bryant, M., and Gath, E.M. (eds.), Geology of the Northern Elsinore Trough; South Coast Geological Society, Santa Ana, California, p. Gath, E.M., 1983, Style of faulting interpreted from a trenching investigation, Glen Ivy South fault, Riverside County, California; in Steller, D.L., Bryant, M., and Gath, E.M. (eds.), Geology of the Northern Elsinore Trough; South Coast Geological Society, Santa Ana, California, p. Foster, John H., 1973, "Faulting Near San Ysidro, Southern San Diego County, California in Studies on the Geology and Geologic Hazards of the Greater San Diego Area, California": San Diego Association of Geologists Guidebook, pp. www.earthconsultants.com /body_p.html   (9342 words)

Southern California Areal Mapping Project home Miller, R.H., and Dockum, M.S., 1983, Ordovician conodonts from metamorphosed carbonates of the Salton Trough, California: Geology, v. Morton, D.M., 1972, Geology of the Lakeview-Perris quadrangles, Riverside County, California: California Division of Mines and Geology Map Sheet 19, scale 1:24,000. Morton, D.M., 1975, Synopsis of the geology of the eastern San Gabriel Mountains, southern California, in Crowell, J.C., ed., San Andreas fault in southern California: California Division of Mines and Geology Special Report 118, p. wrgis.wr.usgs.gov /docs/wgmt/scamp/html/scg_bib_m.html   (9342 words)

UIUC Geology Library--Arizona-California Field Trip Bib Sylvester, A.G., 1979, Guide to the geology and structures of Painted Canyon, Mecca Hills, in Field guide prepared for: Far Western Section, National Association of Geology Teachers; Spring Conference; 25th Annual Meeting; March 17 and 18, 1979, unpaginated. Sylvester, A.G., and Bonkowski, M., 1979, Basement rocks of the Salton Trough region, in Crowell, J.C., and Sylvester, A.G., eds., Tectonics of the juncture between the San Andreas fault system and the Salton Trough, southeastern California; A guidebook: Santa Barbara, CA, Univ. Calif., Dep. Sylvester, A.G., and Smith, R.R., 1979, Structure section across the San Andreas fault zone, Mecca Hills, in Crowell, J.C., and Sylvester, A.G., eds., Tectonics of the juncture between the San Andreas fault system and the Salton Trough, southeastern California; A guidebook: Santa Barbara, CA, Univ. Calif., Dep. www.library.uiuc.edu /gex/bibs/geol315-415ariz.html   (9342 words)

Geoscience - Surat - Bowen basin section 2 Not all coals are mature for hydrocarbon generation with those along the central-eastern margin of the southern Taroom Trough (in the Undulla region) not being sufficiently mature to generate hydrocarbons. BOREHAM, C.J., KORSCH, R.J. and CARMICHAEL D.C., 1996:  The significance of mid-Cretaceous burial and uplift on the maturation and petroleum generation in the Bowen and Surat Basins, eastern Australia.  In Mesozoic geology of the eastern Australia Plate Conference.  Geological Society of Australia Inc. Extended Abstracts, 43, 104-105. AL-AROURI, K.R., 1996: Petroleum geochemistry, source rock evaluation and modelling of hydrocarbon generation in the southern Taroom Trough with particular reference to the Triassic Snake Creek Mudstone. www.nrm.qld.gov.au /mines/petroleum_gas/geoscience/pg_sb_section2.html   (9342 words)

North Africa GeoNet Hagfa Trough, Sirte Basin and (new release in 2001) ' Geology and basin analysis of western offshore Libya '. Geology of the Sirte Basin (summary of a document from Northern Light's Special Collection). Libyan petroleum geology datasets in Geographic Information System (GIS) format are offered by LYNX Information Systems Ltd. www.northafrica.de /libya.htm   (9342 words)

University at Buffalo, Dept. of Geology The Logana Mbr., which encloses the M5 maximum flooding surface, thickens toward the Sebree Trough, which extends as a linear, deep water basin from N Ohio, SW into the Reel Foot Rift. The early A. superbus Zone expansion of the Sebree Trough was synchronous with the replacement of the lower Trenton Group carbonates by the Utica Shale in the Mohawk Valley, NY, as that region entered the Taconic foredeep. Within the Sebree Trough in SW Ohio and SE Indiana, the Curdsville Mbr. wings.buffalo.edu /academic/department/geology/sprg/sebree1.htm   (9342 words)

Geosciences People Suppe J. Analysis of the Growth of Active Detachment Folds Applying the new Thickness Relief Method, With Examples From the Tien-Shan and Nankai Trough. Locations: La Vela, Falcon State 2000 and Venezuela Andean north flank, Bocono, Trujillo State, 2001, emphasis structural geology and Mapping. Field Geology (instructor), three weeks, Venezuelan Andean, Isnotu, Trujillo state, March–April. geoweb.princeton.edu /people/gonzalez/vita.html   (405 words)

Meetings - San Francisco 02 Another, ongoing, marine geology and geophysics project is to study the Structure and evolution of the South Fiji basin - Norfolk basin - northern New Zealand region, the south-eastern New Caledonia basin, Reigna basin and western New Zealand, and the Hikurangi plateau, Chatham Rise and northern Bounty Trough. Cruises during FY2003 include several to the Nankai Trough aimed at obtaining very detailed side-scan sonar image from the deep trench slope to the forearc basin, and studies of the forearc and OBS experiments across the Mariana Arc, involving long-term monitoring of the sea bed across the fault zone off Hatsushima (Sagami Trough). A proposed reflection-refraction geophysical experiment that is aimed at refining our knowledge of North Island subduction zone evolution, from initiation, through back-arc spreading and reorganisation, to its present situation. www.intermargins.org /meetings/sanfrancisco2002.html   (405 words)

Nigeria - SendMail Gombe State is geologically a part of the Upper Benue Trough, although the state is an entity of its own, the Gongola Trough. Geology and Relief: Gombe State is part of the central Nigeria highlands; but the flat landscape in the northern and southern parts of the state have isolated hills. Gombe State lies mostly within the poor groundwater provinces in the Gombe Sandstones, the Pindiga shales; KerriKerri Formation of Tertiary Age and the isolated hills region of the northern www.onlinenigeria.com /links/send.asp?blurb=262   (720 words)

U.S. Geological Survey Studies in the New York Bight, Geologic Background Early seismic-reflection investigations of the sedimentary sequences in the Long Island Platform and Baltimore Canyon Trough (Robertson, 1964; Emery and Uchupi, 1965; Uchupi and Emery, 1967; Garrison, 1970; Schlee and others, 1976) identified acoustic reflectors within the upper Late Jurassic-Cenozoic strata of the Baltimore Canyon Trough and Long Island Platform. Uchupi, E., Driscoll, N., Ballard, R.D., and Bolmer, S.T., 2001, Drainage of late Wisconsin glacial lakes and the morphology and late Quaternary stratigraphy of the New Jersey - southern New England continental shelf and slope: Marine Geology, v. Although these profiles were located approximately 1.5 km apart and are of relatively poor quality compared to present standards of digitally acquired data, Williams (1976) was able to create a rudimentary description of the inner-shelf sedimentary sequences. woodshole.er.usgs.gov /project-pages/newyork/geologicbkgrnd.html   (1786 words)

Nigeria - SendMail Gombe State is geologically a part of the Upper Benue Trough, although the state is an entity of its own, the Gongola Trough. Geology and Relief: Gombe State is part of the central Nigeria highlands; but the flat landscape in the northern and southern parts of the state have isolated hills. Soils in the eastern part of Gombe State are shal low to deep loamy, sandy clay, loam and vertisols with cracking clays that have weathered from shales. www.onlinenigeria.com /links/send.asp?blurb=262   (720 words)

Lingua Terrae Books Geology Japan Cenozoic geology of the Huzina-Kimati District, Izumo Province, Japan - A contribution to igneous geology of the East-Asiatic province of Cenozoic alkaline rocks. Osozawa, S. Geology of Amami Oshima, central Ryukyu Islands, with special reference to effect of gravity transportatation on geologic structure. Shimamura, K. Sedimentation and tectonics of Zenisu Ridge, eastern Nankai trough and Suruga trough regions. home.wxs.nl /~m.rappol/geojapan.htm   (720 words)

Impact of gravity and other geophysical data on the geology of Indian subcontinent. The trench reappears from beneath the thrust in the Sylhet trough. It is evident that the Sunda Trench connects northwards with the E-W trending Sylhet Trough. To the east of the Sunda Trench the Shillong massive is overthrust by the Arakan Yoma. virtualexplorer.com.au /2003/12/6/html   (720 words)

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