Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

[No title] Beyond these regions, these rock units were either not deposited or were eroded away during the Late Pennsylvanian (Kasimovian-early-middle Gzhelian) and Early Permian (late Sakmarian) marine regressions (Leven and Taheri 2003). The Gheselghaleh formation is 242 m thick and consists of bioclastic limestone, sandstone, and marl. Upwards in the section, Gheselghaleh Formation is replaced by sandstone and limestone of the Dorud Formation (Asselian in age, although the basal most strata of Dorud Formation could be late Gzhelian). www.nhm.ac.uk /hosted_sites/pe/2006_1/iran/correlate.htm   (1036 words)

Journal of Paleontology: Biostratigraphy and evolution of Late Carboniferous and Early Permian smaller foraminifers ... (1995) proposed a smaller foraminiferal zonation for the Kasimovian and Gzhelian stages on the basis of material from sections in the Sverdrup Basin of Arctic Canada. The appearance of R. modificata falls at or near the base of the Gzhelian Stage in both the Sverdrup Basin and the Barents Sea. Although smaller foraminiferal subdivisions within the Gzhelian Stage seem tenuous given the present limited information, we suggest that with further testing, occurrences of these taxa may provide a reliable means for distinguishing upper Gzhelian strata from underlying units. www.findarticles.com /p/articles/mi_qa3790/is_199709/ai_n8780203/pg_3   (1247 words)

Stratigraphy and sequence stratigraphy of the Moscovian, Kasimovian and Gzhelian in the Moscow Basin -- Briand et al. ... Stratigraphy and sequence stratigraphy of the Moscovian, Kasimovian and Gzhelian in the Moscow Basin -- Briand et al. Stratigraphy and sequence stratigraphy of the Moscovian, Kasimovian and Gzhelian in the Moscow Basin The Gzhelian deposits form a second order sequence (5-6 m.y.) with a complete cycle of tectono-eustatic variations. bsgf.geoscienceworld.org /cgi/content/abstract/169/1/35   (531 words)

Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate ... Note: I assume that the Gzhelian includes the second half of the Stephanian (2/3 of Stephanian B and all of Stephanian C), after Harland et al. The Monongohela Group is Gzhelian and Asselian according to Kozur (1984 [Kozur, 1984 #3255]). The specific status of the Pennsylvanian species is not clear; Vaughn (1958) attributed several specimens previously in other genera to Eryops, but without clearly indicating whether or not he wished to retain them as distinct species or insert them into E. www.pnas.org /cgi/content/full/0607824103/DC1   (2327 words)

Journal of Paleontology: On Paleozoic plants from marine strata: Hexaloba finisensia new genus and species, a ... The strata have been dated as Virgilian (upper Pennsylvanian: Gzhelian) based on ammonoid biostratigraphy, regionally correlated based on the marine assemblage, and globally correlated based on ammonoid, fusulinacean and conodont data. These morphotaxa conform to trigonocarpalean ovules based on their three angled symmetry and the presence of a stalked nucellus attached to the integument only at the base. Global correlation with the Gzhelian of the south Urals, Russia is supported by ammonoid, fusulinacean and conodont data (Boardman et al., 1994). newssearch.looksmart.com /p/articles/mi_qa3790/is_200201/ai_n9059532   (1374 words)

Dunn, Michael T.   (Site not responding. Last check: 2007-10-29) As part of an ongoing study of Late Paleozoic terrestrial plants preserved in marine environments, a number of specimens of permineralized ovules of medullosan seedferns have been discovered in the Virgilian (Gzhelian), Finis Shale near Jacksboro, Texas. Age assessment of the strata is based on ammonoid biostratigraphy. In addition, these specimens from strata dated by marine biostratigraphy, represent the youngest known occurrence of this genus and thereby extend the known biostratigraphic range of Pachytesta. www.ou.edu /cas/botany-micro/botany2000/section8/abstracts/11.shtml   (286 words)

Vol.107 N.1 A detailed fusulinid biostratigraphic zonation of the Kasimovian and lowermost Gzhelian in southwestern Darvaz is proposed. Based on the investigation of five stratigraphic sections, five local fusulinid zones were established. Eighty-seven species and subspecies, which belong to 18 genera and 7 families of fusulinids, were identified in the Kasimovian and lowermost Gzhelian of Darvaz. users.unimi.it /rips/107/107N1.html   (1457 words)

[No title] This depositional break encompassed Serpukhovian to Gzhelian time and was probably synchronized with the Namurian uplift that mainly influenced Australia and South America of Gondwana. These three sequences were interrupted by two major regressive events: first, the Namurian Uplift ranging in age from Serpukhovian to Gzhelian, and second, the Post-Sakmarian Regression occurring probably at Artinskian time in the Baoshan block, although the precise time interval of the latter event is still unclear. The Baoshan block is characterized by warm-water, highly diverse and abundant faunas during the Early Carboniferous, by cold-water and low diversity faunas during the Early Permian, and by possibly warm-water but low diversity faunas during the Middle Permian. www.korallen.de /iasfcp/body_generals.html   (2804 words)

FACIES Volume 47   (Site not responding. Last check: 2007-10-29) An integrated microfacies analysis of the sampled material in the Southern Alps serves to evaluate the relationships between certain genera and specific microfacies types. The fusulinoidean fauna of the Lower "Pseudoschwagerina" Limestone is of late Gzhelian age. The Carboniferous/Permian boundary is close to the base of the Grenzland Formation, which covers the entire Asselian and a part of the Sakmarian. www.pal.uni-erlangen.de /facies/page/047-abstract.html   (3256 words)

Upper Palaeozoic Fossils from Clastic Sedimentary Rocks in the Gorski Kotar Region, Geologia Croatica, 50/2, 187-199, ...   (Site not responding. Last check: 2007-10-29) Calcisponges, echinoderms and bryozoans occur frequently, while remnants of molluscs, brachiopods and ostracods are scarce. The determined taxa range from the Lower Carboniferous (Viséan), through the Upper Carboniferous (Moscovian, Kasimovian, Gzhelian), up to the Lower Permian (Asselian) in age. Some of the clastic sediments show traces of the multiple redeposition. www.geologia-croatica.hr /printable/gc-50-2-16.html   (149 words)

Current Research--Sawin et al.--page 2 of 6 His results indicate that this interval is similar to that referred to as the Limitisporites monstruosus-Vittatina costabilis assemblage zone reported by Utting (1989) from the Artinskian of the Sverdrup basin in the Canadian Arctic. Dunn also documented a decrease in the relative abundance of palynomorphs across the conodont-defined Carboniferous-Permian boundary, with only two of the 22 palynomorph taxa identified as being exclusively Gzhelian (uppermost Carboniferous) and only one exclusively Asselian (lowermost Permian). The two exclusively Gzhelian taxa occur 5.1 m (17 ft) and 7.1 m (23 ft) below the boundary and the one Asselian taxon occurs 7.4 m (24 ft) above the boundary (Dunn, 2001, fig. www.kgs.ku.edu /Current/2006/sawin/02_intro.html   (1081 words)

[No title]   (Site not responding. Last check: 2007-10-29) The limestone of the Pope formation of the Fort St. James area has been dated by fusulines and conodonts (Thompson, 1965; Thompson et al., 1953; Orchard and Struik, 1996; Orchard et al., 1997, 1998). According to these authors, the limestone is considered to be mostly referable to as Bashkirian to Moscovian and much less commonly the Gzhelian to Asselian. Various rock-types of the clastic limestone of the Pope formation extensively outcrop with basaltic rocks and tuffaceous-siliceous shale in and around a quarry, about 1 km south of the Spad Lake, east of Fort St. James (Fig. cordlink.gsc.nrcan.gc.ca /dev_cordlink2000/English/Browse/showTextBody.cfm?desc_id=1756   (3828 words)

Catalogo Articoli   (Site not responding. Last check: 2007-10-29) Stratigraphy and fusulinids of the Kasimovian and lower Gzhelian (upper Carboniferous) in the southwestern Darvaz (Pamir) Carboniferous; Kasimovian; Gzhelian; Fusulinids; stratigraphy; paleontology; central Asia; A detailed fusulinid biostrarigraphic zonation of the Kasimovian and lowermost Gzhelian in southwestern Darvaz is proposed. serials.cib.unibo.it /cgi-ser/start/it/spogli/df-s.tcl?prog_art=3982114&language=ITALIANO&view=articoli   (277 words)

STRATIGRAPHIC DISTRIBUTION OF THE AMMONOIDS SHUMARDITES AND VIDRIOCERAS AND IMPLICATIONS ON THE ... Historically, the Gzhelian Stage of the Moscow Basin and Russian Platform and the regional Virgilian Stage of North America have been considered equivalent and characterized by the appearance of the Shumardites-Vidrioceras ammonoid genozone. However, although the lower Gzhelian C3JZ Horizon in the Ural Mountains does not contain representatives of Vidrioceras Böse or Shumardites Smith, the fusulinaceans Rauserites rossicus Schellwien, R. In conclusion, the use of the first appearance of Idiognathodus simulator to define the global Gzhelian Stage coincides with the appearance of Vidrioceras and Shumardites and provides continuity with historical usage of the Vidrioceras-Shumardites genozone as characterizing the Gzhelian Stage. gsa.confex.com /gsa/2005SC/finalprogram/abstract_83916.htm   (427 words)

Carboniferous - Permian Boundary Stratotype   (Site not responding. Last check: 2007-10-29) The Aidaralash Creek section is located in the Aktjubinsk (Aqtöbe) region of the Southern Ural Mountains of northern Kazakhstan, approximately 50km east of the city of Aqtöbe. The strata of Beds 1 through 39 (Gzhelian to Sakmarian) consist of hemipelagic silt and clay, with occasional sand and very coarse sand lenses. First occurrence of "isolated-nodular" morphotype of the Streptognathodus "wabaunsensis" conodont chronocline, 27m above the base of Bed 19. www.stratigraphy.org /carper.htm   (400 words)

[No title] The data are restricted to a part of the succession (Villa and Martínez García 1989), wherefore the age of the overlaying units can not be established. Hence, new samples of fusulinids have been collected and dated as young as Gzhelian. Investigations of the palynomorpha yield no further biostratigraphic details because of the destruction by bacterial activity, and crystallization of Pyrite. www.geologie.uni-freiburg.de /root/people/studis/rehms/abstr-eng.html   (428 words)

MCLEAN, R   (Site not responding. Last check: 2007-10-29) The rugose coral genera Petalaxis and Cystolonsdaleia occur at several stratigraphic levels in Moscovian to Gzhelian strata of the Sverdrup Basin. They are found in shelf carbonates of the middle and upper Canyon Fiord, Lower Nansen and lower Belcher Channel formations, and in correlative debris flow deposits and shallow-water, reef-associated carbonates within basinal Hare Fiord Formation. nov., and Kasimovian or lower Gzhelian species P. www.korallen.de /corallina/summaries/sum0009.htm   (249 words)

Quinqueremis In the present paper only the type species is described. The first representatives of this genus are known from the Gzhelian Stage of the Upper Carboniferous. They are not abundant and, as a rule, are poorly preserved. www.mnhn.fr /mnhn/geo/radworld/genarchaeo/Quinqueremis.html   (503 words)

t52d in fm99 The tectonic evolution of the entire orogenic wedge may be related with continuous crustal shortening during sinistral oblique subduction and collision. Following accretion of the nappe pile in an oblique plate convergence with an important sinistral strike-slip component, a deformational hiatus in the Carboniferous is recorded in the western foreland of the Southern Urals, where shallow marine carbonates of Tournasien to Gzhelian age were deposited. The western foreland thrust and fold belt developed in Permian to Triassic times with a small amount of shortening ($\sim$17km) and results from the accretion of terranes in the poorly exposed eastern part of the Urals. www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=fm99&database=/data/epubs/wais/indexes/fm99/fm99&maxhits=200&="T52D"   (3331 words)

MGY99.Abs.html   (Site not responding. Last check: 2007-10-29) Stage C3 values remain mostly between 3 and 4.5‰ up section to the Virgilian (Gzhelian). C probably reflect global increases in sedimentary organic carbon burial and suggest pCO O values then fluctuate between -1 and -3‰ (C3 stage) up section to the Virgilian (Gzhelian). geoweb.tamu.edu /faculty/grossman/MGY99.Abs.html   (417 words)

paleng6_2p632abs   (Site not responding. Last check: 2007-10-29) the stratotype sections of the Gzhelian Stage of the Upper Carboniferous are reviewed. enko, 1955, are described from the Gzhelian assemblage. If you have any problems with this server, contact webmaster@maik.ru. www.maik.rssi.ru /cgi-bin/search.pl?type=abstract&name=paleng&number=6&year=2&page=632   (128 words)

Vai & Venturini   (Site not responding. Last check: 2007-10-29) The sections spanning a large part of the Mid-Late Carboniferous to terminal Permian time interval are correlated so as to show the major sedimentary cycles and the main regional trends of tectonic High frequency cyclicity is also summarized in terms of parasequences especially for the Gzhelian stage, although the entire Pontebba Supergroup (Moscovian to Artinskian) was known for many decades as a classic cyclic sedimentation area. Palaeogeographic maps, guidelines, legeng, low and high frequency cycles, tectonics, eustatism, parasequences, Gzhelian, correlation, Southern Alps, Adriatic Sea. www.mnhn.fr /publication/geodiv/g97n2a1.html   (307 words)

UC Davis Geology: GSA Meeting Abstracts Subsequent ice melting culminated in the Kasimovian when calcic Vertisols once again developed during fourth-order low stands and dry subhumid climates. Ice build-up during the Gzhelian led to sea-level fall and the development of fourth-order humid-climate paleosols. These trends are best explained by a paleo-atmospheric climate model in which tropical southern Euramerica were relatively humid whenever high-pressure over ice sheets fixed the position of high-latitude polar fronts and the intertropical convergence zone near the equator. www-geology.ucdavis.edu /www/Pubs/gsa05/montanez4_05.html   (292 words)

News: Executive Committee Meeting 2004   (Site not responding. Last check: 2007-10-29) New Subdivison on the Series level in the Carboniferous System— the proposal is to subdivide the Pennsylvanian and the Mississippian (Carboniferous) into an Upper, Middle, and Lower Series. Apart from the Upper Pennsylvanian, which would have two Stages (Kasimovian and the Gzhelian), all Series would comprise one stage only. The new subdivision would terminate a century-long competition and incompatible regional terminology for the Carboniferous. www.iugs.org /iugs/news/excom04.htm   (2083 words)

vol1-p47   (Site not responding. Last check: 2007-10-29) Late Gzhelian (Carboniferous) to early Asselian (Permian) non-ammonid cephalopods from the Taishaku Limestone Group, Southwest Japan Department of Environmental Studies, Faculty of Integrated Arts and Sciences, Hiroshima University, Higashihiroshima, 739 Japan This fauna is important because it adds some new data to a poorly known Late Carboniferous-Early Pemlian non-ammonoid cephalopod fauna. ammo.kueps.kyoto-u.ac.jp /palaeont/publish/pr/pr-abust/vol.1/vol1-p47.html   (139 words)

2007 GSA Section Meetings, Lawrence, Kansas--Field Trip 1   (Site not responding. Last check: 2007-10-29) In addition to the sequence stratigraphic analysis of the Virgilian Stage, this field trip will examine the Missourian-Virgilian boundary and it's relationship with the global Kasimovian-Gzhelian boundary based on conodonts, fusulinids, and ammonoids. Additionally, the field trip will focus on the often proposed need for further subdivision of the Gzhelian to include an upper Bursumian (Orenburgian). The field trip will start on April 8 in Lawrence, Kansas and end up in Lawrence on April 11. www.kgs.ku.edu /Conferences/GSA07/trip1.html   (112 words)

nkysdb: OZAWA Tomowo Stratigraphy of the Nishitama Group (Uppermost Permian to Triassic) in the Iwai-Kanyo Area, Southern Kanto Mountains, Japan ? Late Gzhelian (Carboniferous) to early Asselian (Permian) non-ammonoid cephalopods from the Taishaku Limestone Group, Southwest Japan ? Reexamination of the Sagara Fauna - Middle Miocene molluscan assemblage from the Sugegaya Formation, Sagara Group, Shizuoka Prefecture, Central Japan - ? staff.aist.go.jp /miyagi.iso14000/Works/Review/coop/0001/741.html   (369 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.