Consulta: subjectFacets:"Stratigraphy"
Registros recuperados: 32
Data/hora: 01/06/2024 08:23:02

Relações solo-paisagem na Fazenda Experimental Catuaba.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: AMARAL, E. F. do; SILVA, J. R. T. da; RIBEIRO NETO, M. A.; MELO, A. W. F. de; ARAÚJO, E. A. de; BARDALES, N. G.; OLIVEIRA, T. K. de; AMARAL, E. F. do; LANI, J. L.; SILVA, F. M. e.
Este estudo se constitui na estratificação dos solos e paisagem da Fazenda Experimental Catuaba que está localizada às margens da rodovia BR- 364, sentido Rio Branco - Porto Velho, com uma área aproximada de 976 ha. A caracterização e espacialização dos solos foi integrado com a paisagem de ocorrência e consistiram nas seguintes etapas: coleta de horizontes pedogenéticos de perfis de solo a campo, análises físicas e químicas das amostras coletadas e atividades de geoprocessamento. Os solos avaliados foram classificados em LATOSSOLO VERMELHO Distrófico típico, LATOSSOLO VERMELHOAMARELO Alumínico típico, ARGISSOLO VERMELHO Distrófico típico, PLINTOSSOLO HÁPLICO Distrófico típico e GLEISSOLO HÁPLICO Ta Distrófico, de acordo com o Sistema Brasileiro de...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Topossequência; Ciencia del suelo; Granjas de demostración; Argissolo vermelho; Plintossolo háplico; Gleissolo háplico; Red latosol; Red yellow latosol; Red yellow argisol; Haplic plinthosol; Haplic gleisolic; Fazenda Experimental Catuaba; Universidade Federal do Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Pedologia; Estratigrafia; Campo Experimental; Latossolo Vermelho; Latossolo Vermelho Amarelo; Soil science; Stratigraphy; Demonstration farms.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1128543

Constraining the age of the last geomagnetic reversal from geochemical and magnetic analyses of Atlantic, Indian, and Pacific Ocean sediments
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Valet, Jean-pierre; Bassinot, Franck; Simon, Quentin; Savranskaia, Tatiana; Thouveny, Nicolas; Bourlés, Didier L.; Villedieu, Anouk.
We studied four marine sediment records of the Matuyama–Brunhes geomagnetic reversal from four sites located in the Indian, Atlantic and western Pacific oceans. The results combine paleomagnetic, cosmogenic nuclide beryllium (10Be) and oxygen isotope analyses that were performed on the same samples in order to avoid any stratigraphic bias. The three records from the equatorial Indian Ocean and North Atlantic Ocean did not reveal any offset between the authigenic 10Be/9Be ratio (Be-ratio) peak and the interval of low relative paleointensity (RPI) that characterizes the reversal. The lower and upper limits of transitional directions are also concomitant with the increased atmospheric 10Be production that accompanied the geomagnetic dipole intensity decrease....
Tipo: Text
Palavras-chave: Magnetic reversal; Brunhes-Matuyama; Be-ratio; Field intensity; Stratigraphy.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00469/58063/60459.pdf

Subseafloor stratigraphic profiling and soil classification from piezocone tests: A case study in the Gulf of Lion (NW Mediterranean Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lafuerza, S.; Frigola, J.; Canals, M.; Jouet, Gwenael; Bassetti, Maria-angela; Sultan, Nabil; Berne, Serge.
We show the results provided by piezocone tests in determining the stratigraphic profile and the soil classification of two drilling sites in the outer shelf and the upper slope of the Gulf of Lion, PRGL2 and PRGL1, respectively. Correlations with grain-size data indicate that sleeve friction can be used for profiling fine-grained sediments (site PRGL1), whereas cone tip resistance is the most adequate for sequences made of alternations of coarse- and fine-grained intervals (site PRGL2). Normalized cone resistance and friction ratio proved to be also appropriate for soil stratigraphy as it depicts trends in the coarse fraction of the tested soil. Silts and clays present in similar proportions at site PRGL1 responded to piezocone testing as pure clays...
Tipo: Text
Palavras-chave: Gulf of Lion; Soil classification; Stratigraphy; Piezocone.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6121.pdf

Evolution of the danube deep-sea fan since the last glacial maximum: New insights into Black Sea water-level fluctuations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Constantinescu, Adriana; Toucanne, Samuel; Dennielou, Bernard; Jorry, Stephan; Mulder, T.; Lericolais, Gilles.
The Danube Deep-Sea Fan (NW Black Sea) is one of the most developed deep-sea sediment depositional systems in Europe. Although the morphology and the architecture have been widely described in the past years, little is known about the stratigraphy of this depositional system. For the late Quaternary, this results from the lack of significant stratigraphic markers, the scarcity of radiocarbon ages and the difficulty in constraining reservoir ages. Recent robust quantification of reservoir ages has allowed the construction of a new stratigraphic framework for the Black Sea from the end of the last glacial period to the Holocene, thus giving the opportunity to correlate sedimentological and geochemical features previously described on the NW Black Sea margin...
Tipo: Text
Palavras-chave: Danube deep-sea fan; Turbidites; Stratigraphy; Last glacial maximum; Termination 1; Water-level fluctuations.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00271/38236/64238.pdf

Stratigraphy and sedimentary environments during the Late Quaternary, in the Eastern Bohai Sea (North China Platform)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Marsset, Tania; Xia, D; Berne, Serge; Liu, Z; Bourillet, Jean-francois; Wang, K.
The Bohai Sea is a shallow sea at the east coast of China. It communicates with the Yellow Sea through a narrow strait. During and since the Late Pleistocene, the Bohai Sea has been a filled subsiding basin submitted to successive regressive-transgressive cycles. In the East Bohai Sea, a number of finger-shaped ridges are present near the strait, where tidal currents are dominant. Very-high resolution seismic reflection data have been interpreted relative to sedimentological data provided by a formerly drilled borehole.  Seven seismic units are identified and correlated with the following events: units U7-U6 with the Bohai relative sea level rise (65,000–53,000 yr B.P.) and a relative sea level fall (53,000–39,000 yr B.P.); unit U5 with the Xianxian...
Tipo: Text
Palavras-chave: Eastern Bohai Sea; Late Pleistocene; Stratigraphy; Relative sea level variations; Tidal ridges; Very-high resolution seismic.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00061/17193/14695.pdf

Holocene biostratigraphy and paleoenvironmental changes in the Black Sea based on calcareous nannoplankton
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Giunta, Simona; Morigi, Caterina; Negri, Alessandra; Guichard, Francois; Lericolais, Gilles.
In this study, detailed micropaleontological analyses were carried out on 270 samples from eight piston cores collected in the Black Sea. The primary goal was to elucidate the Late Quaternary evolution of the Black Sea, specifically to refine its biostratigraphy and to explore the Holocene paleoenvironmental changes. Three intervals were recognized in all the cores studied, irrespective of whether they were from the basin or the shelf. These intervals are characterized, from old to young, by the spotty occurrence, the presence and the local acme of Emiliania huxleyi respectively. Moreover, the species Braarudosphaera bigelowii is, in contrast to the younger units, absent in the oldest unit. The co-occurrence of the two marine species E. huxleyi and B....
Tipo: Text
Palavras-chave: Stratigraphy; Late Quaternary; Black Sea; Calcareous nannoplankton.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2674.pdf

Environmental change in the Sea of Okhotsk during the last 1.1 million years
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nurnberg, D; Tiedemann, R.
On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size record ( China loess particle timescale, CHILOPARTS) suggests that environmental changes in both the Sea of Okhotsk area and in SE Asia were closely related via the Siberian atmospheric high-pressure cell. During full glacial times our records point to a strong Siberian High causing northerly wind directions, the extension of the sea ice cover, and a reduced Amur River discharge. Deglacial maxima of terrigenous flux were succeeded by or synchronous to...
Tipo: Text
Palavras-chave: Sea of Okhotsk; Paleoproductivity; Terrigenous flux; Sea ice dynamics; Stratigraphy.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/00228/33934/32231.pdf

Geophysical characterization of bottom simulating reflectors in the Fairway Basin (off New Caledonia, Southwest Pacific), based on high resolution seismic profiles and heat flow data
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nouze, Herve; Cosquer, Emmanuel; Collot, Julien; Foucher, Jean-paul; Klingelhoefer, Frauke; Lafoy, Yves; Geli, Louis.
High-resolution reflection and refraction seismic data were collected in 2004 to investigate, in further detail than allowed by pre-existing low resolution seismic data, the nature of a Bottom Simulating Reflector (BSR) that extends over a broad area of the Fairway Basin, a rifted, continental structure located on the eastern flank of the Lord Howe Rise, to the southwest of New Caledonia. Two main reflectors are documented: the shallower (RN) mimics the seafloor and has a negative polarity while the deeper (RP) does not always mimic the seafloor and has a positive polarity. Using the existing regional seismic lines, we can show that reflector RN can be continuously followed up to DSDP 208 drill hole site. Reflector RP is discontinuous and cannot be traced...
Tipo: Text
Palavras-chave: Stratigraphy; Gas hydrates; Geophysics; Southwest Pacific; Fairway Basin; BSR.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7321.pdf

Factors controlling margin instability during the Plio-Quaternary in the Gela Basin (Strait of Sicily, Mediterranean Sea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gauchery, Tugdual; Rovere, Marzia; Pellegrini, Claudio; Cattaneo, Antonio; Campiani, Elisabetta; Trincardi, Fabio.
This study presents novel findings on the Pliocene and Quaternary evolution of the Gela Basin (Strait of Sicily, Mediterranean Sea), an area recording the interaction between tectonics, climate change at a Milankovitch and sub-Milankovitch timescales, and dynamic water masses exchange between the eastern and western Mediterranean Sea. The calibration of seismic profiles with exploration boreholes allowed for the refining the chronostratigraphic framework of the Gela Basin and highlighted the main phases of margin growth. Since the Pliocene, the margin has recorded the deposition of 100 m high shelf-edge clinothems, accompanied by sediment drifts on the slope and mass-transport deposits (MTDs), possibly triggered by seismic activity. Through the...
Tipo: Text
Palavras-chave: Stratigraphy; Middle Pleistocene Transition; Plio-Quaternary; Contourites; Clinothems; Mass-transport deposits; Continental margin evolution; Glacio-eustatic variations.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00655/76739/77888.pdf

The stratigraphy and regional structure of Miocene deposits in western Amazonia (Peru, Colombia and Brazil), with implications for late Neogene landscape evolution
Provedor de dados: Naturalis Digital Academic Repository
Autores: Wesselingh, F.P.; Hoorn, M.C.; Guerrero, J.; Räsänen, M.E.; Romero Pittmann, L.; Salo, J.A.
A biozonation based on molluscs is proposed for Miocene deposits of western Amazonia (Peru, Colombia and Brazil), commonly referred to as the Pebas Formation. The new zonation refines existing pollen zonations and provides a key for the quick assessment of the stratigraphic position of Neogene deposits in the field. The regional distribution of twelve mollusc zones reveals a structuring of geological units around the broad Iquitos-Araracuara anteclise. The structure of the subsurface appears to have been a major factor in the determination of present-day second and lower order river courses in the study area. Based on this work a biostratigraphic framework for Miocene deposits of western Amazonia, including fossiliferous deposits from adjacent basins...
Tipo: Article / Letter to the editor
Palavras-chave: Stratigraphy; Mollusca; Miocene; Western Amazonia; Pebas Formation; 42.73; 38.22.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/209729

Landscape evolution and depositional processes in the Miocene Amazonian Pebas lake/wetland system: evidence from exploratory boreholes in northeastern Peru.
Provedor de dados: Naturalis Digital Academic Repository
Autores: Wesselingh, F.P.; Guerrero, J.; Räsänen, M.E.; Romero Pittmann, L.; Vonhof, H.B.
This study of the type and scales of depositional processes and landscape development in western Amazonia during the Miocene is based on the description and interpretation of three boreholes from the Marañon basin (Peru). The Miocene Pebas Formation, and the overlying Marañon Formation and underlying Chambira Formation are lithologically characterised. An age calculation model indicates an Oligocene age for the Chambira Formation, and an Early – early late Miocene age for the Pebas Formation. The base of the Chambira Formation is placed at a sequence boundary and corresponds to the beginning of a regression. The succession was deposited in floodplains included in a RST and a LST under a seasonal climate with a pronounced dry season. The base of the Pebas...
Tipo: Article / Letter to the editor
Palavras-chave: Miocene; Marañon basin; Peru; Pebas Formation; Chambira Formation; Stratigraphy; 38.16.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/209731

Late Cretaceous-Early Palaeogene echinoderms and the K/T boundary in the southeast Netherlands and northeast Belgium — Part 5: Asteroids
Provedor de dados: Naturalis Digital Academic Repository
Autores: Jagt, J.W.M.
All Campanian, Maastrichtian and Danian asteroids known to date from the extended type area of the Maastrichtian Stage, are described and illustrated. The geographic and stratigraphic distribution are documented. Eighteen genera (one of them new) and at least sixty-four species (eight of them new) are listed: Astropecten? sp. nov., astropectinid sp. nov., Coulonia? sp. nov., Lophidiaster? gr. punctatus/ postornatus, L. pygmaeus Spencer, 1913, Aldebarania sp. nov., Astropectinidae indet., ctenodiscid? indet., benthopectinid sp. 1 (? spp.), benthopectinid sp. 2, Metopaster alexiae sp. nov., M. aff. carinatus Brünnich Nielsen, 1943, M. continuus sp. nov., M. decipiens Spencer, 1913, M. kagstrupensis Brünnich Nielsen, 1943, M. lisannae sp. nov., M. miriamae...
Tipo: Article / Letter to the editor
Palavras-chave: Echinodermata; Asteroidea; Late Cretaceous; Early Palaeogene; Taxonomy; Stratigraphy; 42.72; 38.22.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/219134

The stratigraphic positions of the Wadi Dukhan and Al Uwayliah formations, northeast Libya – a review
Provedor de dados: Naturalis Digital Academic Repository
Autores: Tmalla, A.F.A.
The stratigraphic positions of the Wadi Dukhan and Al Uwayliah formations are reviewed. Diagnostic Maastrichtian larger foraminiferal species from the Wadi Dukhan Formation in well B7 – 41 (Cyrenaica) and in well U2 – 6 (northeastern Sirt Basin) are illustrated for the first time. These species are Omphalocyclus macroporus (Lamarck), Siderolites cf. calcitrapoides Lamarck and Orbitoides cf. media (d’Archiac).   Following the rules of nomenclature, the type section of the Al Uwayliah Formation should be considered a composite stratotype. The section east of al Uwayliah village is the holostratotype (upper part of the formation) and the Jardas al Jarrari section is the parastratotype (lower part of the formation). The combined thickness of the two component...
Tipo: Article / Letter to the editor
Palavras-chave: Maastrichtian; Paleocene; Northeast Libya; Stratigraphy; Foraminifera; 38.22; 42.79.
Ano: 2007
URL: http://www.repository.naturalis.nl/record/217418

On the Barremian - lower Albian stratigraphy of Colombia
Provedor de dados: Naturalis Digital Academic Repository
Autores: Hoedemaeker, P.J.
The biostratigraphy and sequence stratigraphy of the Barremian deposits, and the biostratigraphy of the Aptian deposits in the Villa de Leyva area in Colombia are briefly described.
Tipo: Article / Letter to the editor
Palavras-chave: Stratigraphy; Barremian; Aptian; Depositional sequences; Colombia; 38.16.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/214456

Late Cretaceous-Early Palaeogene echinoderms and the K/T boundary in the southeast Netherlands and northeast Belgium - Part 1: Introduction and stratigraphy
Provedor de dados: Naturalis Digital Academic Repository
Autores: Jagt, J.W.M.
In a series of papers describing Late Cretaceous and Early Palaeogene echinoderm faunas (exclusiveof holothurians) of the Maastrichtian type area, the present contribution comprises a detailed accountof the litho- and chronostratigraphy and biozonations of these deposits, and of localities from whichthe echinoderm material to be described stems. In subsequent papers reference will be made to thisintroductory part.
Tipo: Article / Letter to the editor
Palavras-chave: Echinodermata; Late Cretaceous; Early Palaeogene; Localities; Stratigraphy; 42.77; 38.22.
Ano: 1999
URL: http://www.repository.naturalis.nl/record/218995

Stratigraphy of the type Maastrichtian – a synthesis
Provedor de dados: Naturalis Digital Academic Repository
Autores: Jagt, J.W.M.; Jagt-Yazykova, E.A.
A synthesis of the stratigraphy of the Maastrichtian Stage in its extended type area, that is, southern Limburg (the Netherlands), and adjacent Belgian and German territories, is presented with a brief historical overview. Quarrying activities at the large quarry complex of ENCI-HeidelbergCement Group will officially come to an end on July 1, 2018. However, the stratotype section below the Lichtenberg farmstead and directly behind the main office building at the Lage Kanaaldijk (Maastricht), will be preserved, as will various faces within the quarry complex. Strata of Maastrichtian age include the Vijlen, Lixhe 1-3 and Lanaye members of the Gulpen Formation, as well as the Valkenburg, Gronsveld, Schiepersberg, Emael, Nekum and Meerssen members of the...
Tipo: Article / Letter to the editor
Palavras-chave: Late Cretaceous; Maastrichtian; Type area; Localities; Stratigraphy; 38.16; 38.22.
Ano: 2012
URL: http://www.repository.naturalis.nl/record/428924

Late Cretaceous-Early Palaeogene echinoderms and the K/T boundary in the southeast Netherlands and northeast Belgium — Part 4: Echinoids
Provedor de dados: Naturalis Digital Academic Repository
Autores: Jagt, J.W.M.
All Campanian, Maastrichtian and Danian echinoids known to date from the extended type area of the Maastrichtian Stage are listed and, with a few exceptions, also illustrated. The geographic and stratigraphic distribution of these echinoderms are documented. A total of 55 (sub)genera and 119 (sub)species (inclusive of formae), two of which are new, are recognised. A number of taxa are reassigned, while others have to remain in open nomenclature for the time being. Recorded for the first time from the area are representatives of Hagenowia and Zeuglopleurus, as well as juvenile specimens of Hemipneustes striatoradiatus. Cidaris gigas (= Temnocidaris (Stereocidaris) gigas) is accepted as a valid species. The name Cyphosoma rutoti is shown to be based on the...
Tipo: Article / Letter to the editor
Palavras-chave: Echinodermata; Echinoidea; Late Cretaceous; Early Palaeogene; Taxonomy; Stratigraphy; 42.72; 38.22.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/219114

New data on Early Cretaceous (Hauterivian-Barremian) heteromorphic ammonites from northern Germany
Provedor de dados: Naturalis Digital Academic Repository
Autores: Kakabadze, M.V.; Hoedemaeker, P.J.
The stratigraphic ranges and systematics of heteromorphic ammonites from Lower Cretaceous (Hauterivian-Barremian) deposits in Lower Saxony, northern Germany, are revised. Nine genera and fortyseven species of the family Ancyloceratidae Gill, 1871, are described. One genus (Fissicostaticeras) and 20 species are new; Emericiceras ressense, E. sornayiforme, E. serpentinum, E. subtilicostatum, E. gotti, E. hannoverense, E. kemperi, Crioceratites hastensis, C. subisocostatus, C. vermiformis, Fissicostaticeras claviferum, F. aequicostatoides, F. rarocinctoides, Paracrioceras kleini, Acrioceras (Acrioceras) sarstedtense, A. (A.) crassicostatum, A. (A.) aegidii, A. (A.) longum, A. (A.) astrictum and Uhligia aegidii.
Tipo: Article / Letter to the editor
Palavras-chave: Heteromorphic ammonites; Systematics; Hauterivian; Barremian; Stratigraphy; Northern Germany; New taxa; 38.22.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/329769

Late Cretaceous-Early Palaeogene echinoderms and the K/Tboundary in the southeast Netherlands and northeast Belgium - Part 2: Crinoids
Provedor de dados: Naturalis Digital Academic Repository
Autores: Jagt, J.W.M.
All Campanian, Maastrichtian and Danian articulate (cladid) crinoids known to date from the extendedtype area of the Maastrichtian Stage, are described and illustrated. The geographic and stratigraphicdistribution of this unexpectedly diverse echinoderm group are documented. A total of twentygenera (three of them new) and thirty-six species (six of them new) are defined: Austinocrinus bicoronatus(von Hagenow, 1840), ‘Isocrinus’ sp., ‘I.’ lanceolatus (Roemer, 1840)?, Isselicrinus buchii (Roemer,1840), Praeisselicrinus? limburgicus (Rasmussen, 1961), Nielsenicrinus agassizii (von Hagenow, 1840) (=‘Pentacrinites’ kloedeni von Hagenow, 1840), N. ewaldi sp. nov., Jaekelometra gr. belgica (Jaekel, 1902), J.gr. concava (Schlüter, 1878) (= J. columnaris Gislén,...
Tipo: Article / Letter to the editor
Palavras-chave: Echinodermata; Crinoidea; Late Cretaceous; Early Palaeogene; Taxonomy; Stratigraphy; 42.77; 38.22.
Ano: 1999
URL: http://www.repository.naturalis.nl/record/218997

Late Cretaceous-Early Palaeogene echinoderms and the K/T boundary in the southeast Netherlands and northeast Belgium —
Provedor de dados: Naturalis Digital Academic Repository
Autores: Jagt, J.W.M.; Kutscher, M.
The present paper is divided into two parts. In the first, all Campanian, Maastrichtian and Danian ophiuroids known to date from the extended type area of the Maastrichtian Stage, are described and illustrated. The geographic and stratigraphic distribution of this diverse echinoderm group are documented. A total of twenty-one genera (one of them new) and thirty-seven species (seven of them new) are recorded from the Campanian-Danian of Liège-Limburg and the Aachen area (Germany). The following taxa are new: Ophiocten? yvonnae sp. nov., Stegophiura? trispinosa sp. nov., Deckersamphiura inusitata gen. et sp. nov., Ophiarachna? martinblomi sp. nov., Ophiolepis? falsa sp. nov., Ophiomusium lux sp. nov., and Mesophiomusium decipiens gen. et sp. nov. Additional...
Tipo: Article / Letter to the editor
Palavras-chave: Echinodermata; Ophiuroidea; Late Cretaceous; Early Palaeogene; Taxonomy; Stratigraphy; 42.72; 38.22.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/219095

Características estratigráficas y morfodinámicas de la franja litoral Caribe colombiana (Sector Barranquilla (Bocas de Ceniza) - Flecha de Galerazamba)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Molina-M., A.; Molina-M., C.; Giraldo-O., L.; Barrera-O., R.
The geologic (stratigraphic) and morphodynamic characteristics throughout 76 km of the coastal profile of the Colombian Caribbean, including those between Barranquilla (Bocas de Ceniza) and the spit of Galerazamba are described. The sections of the coast that have been affected by erosive events and those with sedimentary accretion are described. Some of them are associated to both natural and anthropic phenomena. Geologically, the coastal edge is defined by sedimentary rocks, weakly consolidated sediments and inconsolidated sediments, that include ages from the upper Paleocene to the Recent. From the point of view of the evaluation of the coast in terms of stability and instability, the high coasts are classified as: Critic zones (Punta Sabanilla,...
Tipo: Journal Contribution
Palavras-chave: Stratigraphy; Coastal zone; Erosion; Sedimentation; Stratigraphy; Erosion; Sedimentation; Http://aims.fao.org/aos/agrovoc/c_7440; Http://aims.fao.org/aos/agrovoc/c_2651; Http://aims.fao.org/aos/agrovoc/c_6926.
Ano: 1999
URL: http://hdl.handle.net/1834/3433

Uber ein holozänes Korallen- und Mangrovenvorkommen nahe Santa Marta, Kolumbien
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Erfa, A.v.; Geister, J.
En el mes de nov./1969 olas larga procedentes de un huracán en el NW del Mar Caribe causaron temporalmente la erosión de la "Punta la Loma", una punta de arena situada en la playa frente al aeropuerto Simón Bolívar de Santa Marta. Como resultado de este suceso afloró el sustrato de esta punta, el cual esta formado de una granodiorita encrustada por corales arrecifales y cubierta por una arena cementada. En la fauna coralina están presentadas solamente especies recientes conocidas de la costa colombiana del Caribe. También se encontraron algunos moluscos y abundantes restos litificados de raíces de mangles.
Tipo: Journal Contribution
Palavras-chave: Coral; Geology; Stratigraphy; Sedimentation; Mangroves; Ecosystems; Geology; Stratigraphy; Ecosystems; Sedimentation; Mangroves; Http://aims.fao.org/aos/agrovoc/c_3232; Http://aims.fao.org/aos/agrovoc/c_7440; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_6926; Http://aims.fao.org/aos/agrovoc/c_16190.
Ano: 1976
URL: http://hdl.handle.net/1834/3299

Notas preliminares sobre la estratigrafía del Paleozoico en el Norte de los Andes de Colombia.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Forero, A.
Se describen los afloramientos paleozoicos en el flanco occidental de la Serranía de Perijá y los recientemente descubiertos en el flanco oriental de la Sierra Nevada de Santa Marta del Devoniano y Carboniano superior, a la vez que se intenta una correlación de los mismos afloramientos con los ya conocidos en el flanco oriental de la Serranía de Perijá y Serranía de Mérida. Al este de Manaure la serie paleozoica está representada por rocas metamórficas del Cambro-Ordoviciano y capas no metamórficas del Devoniano, Carboniano y Permiano.
Tipo: Journal Contribution
Palavras-chave: Stratigraphy; Stratigraphy; Http://aims.fao.org/aos/agrovoc/c_7440.
Ano: 1967
URL: http://hdl.handle.net/1834/3260

La Isla Santa Clara, testigo morfoestructural de la evolución geodinámica plio-cuaternaria y actual del Golfo de Guayaquil.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Santana, E.; Dumont, J.F.
Este contexto estratigráfico y estructural, hace que la Isla Santa Clara sea un testigo directo de los eventos neotectónicos del Golfo de Guayaquil. El estudio realizado en la Isla Santa Clara se ha desarrollado bajo dos objetivos: 1. Obtener datos detallados de la evolución temprana y actual de la Isla, en base a nuevos datos de estratigrafía y morfología, 2. Encuadrar la evolución de la Isla dentro del contexto sismotectónico y estructural del Golfo de Guayaquil, a fin de precisar la localización de las fallas potencialmente activas.
Tipo: Journal Contribution
Palavras-chave: Stratigraphy; Structural geology; Tectonophysics; Quaternary; Bathymetric data; Oceanic islands; Stratigraphy; Http://aims.fao.org/aos/agrovoc/c_7440.
Ano: 2000
URL: http://hdl.handle.net/1834/2259

Stratigraphic framework of early Pliocene fossil localities along the north bank of the Cimarron River, Meade County, Kansas
Provedor de dados: Ameghiniana
Autores: Honey,James G.; Peláez-Campomanes,Pablo; Martin,Robert A.
The stratigraphy of early Pliocene (early Blancan) fossiliferous sediments exposed in canyons along the north bank of the Cimarron River in Meade County, Kansas is described as part of a larger, ongoing project to create a refined biostratigraphic model for late Neogene and Pleistocene mammalian fossil localities from the Meade Basin. Because the utility of previously named formation and member names is questionable, we introduce a set of informal names for stratigraphic units in our study area. Sediments in the region are up to 34 m thick, and include a basal sand and gravel ("Bishop gravel") at least 9 m thick, overlain by up to 17 m of lightto pinkish-gray, fine-grained sand and silt, with interbedded calcium carbonate layers. These fine-grained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mammals; Rodents; Pliocene; Blancan; Stratigraphy.
Ano: 2005
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142005000200015

Flow-by-flow chemical stratigraphy and evolution of thirteen Serra Geral Group basalt flows from Vista Alegre, southernmost Brazil
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Pinto,Viter M; Hartmann,Léo A.
The geochemical characterization of thirteen Serra Geral Group flows in the Vista Alegre region (RS-SC), southern Brazil, displays the homogeneous basaltic composition near 50 wt.% SiO2. Each of the five basal flows (Pitanga-type, high-Ti/Y ~600, TiO2 &gt; 3 wt.%) and eight upper flows (Paranapanema-type, medium Ti/Y ~400, TiO2 &gt; 2 wt.%) can be identified from their chemical composition; sets of flows have parallel variation in chemical composition. The flow-by-flowcorrelation in four sections shows the horizontal position of the flows in three profiles and an approximately 200-m downdrop of the Itapiranga block with respect to the Frederico Westphalen block. The world-class amethyst geode mineralization and the systematic presence of native copper in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geochemical correlation; Basalt; Stratigraphy; Serra Geral Group; Vista Alegre.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000200006

Application of shallow seismic profiling to study riverbed architectural facies: a case study of the Tocantins river (Pará - Brazil)
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Ianniruberto,Marco; Campos,José E.G.; Araújo,Vitto C.M.
To date, the vast majority of river sedimentology study has relied on two main categories of observation: direct observation of shallow trenches, cut faces and cores or geophysical survey on dry and shallow regions of braid bars. In this study, a sub-bottom profiler was used to investigate the stratigraphy of the lower course of the Tocantins River in the Amazon region, between the city of Tucuruì and the village of Nazaré dos Patos. The interest in this specific region lies on the possible variation of the fluvial regime due to the installation of the dam of the Tucuruì hydroelectric plant and the perspective that such river would become navigable as soon as the canal lock will be completed. Collected data show a detailed variety and complexity of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anastomosed rivers; Alluvial sedimentology; Architectural facies; Stratigraphy; High-resolution seismic.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300007

Contribution to the stratigraphy of the onshore Paraíba Basin, Brazil
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Rossetti,Dilce F.; Góes,Ana M.; Bezerra,Francisco H.R.; Valeriano,Márcio M.; Brito-Neves,Benjamim B.; Ochoa,Felipe L.
Several publications have contributed to improve the stratigraphy of the Paraíba Basin in northeastern Brazil. However, the characterization and distribution of sedimentary units in onshore areas of this basin are still incomplete, despite their significance for reconstructing the tectono-sedimentary evolution of the South American passive margin. This work provides new information to differentiate among lithologically similar strata, otherwise entirely unrelated in time. This approach included morphological, sedimentological and stratigraphic descriptions based on surface and sub-surface data integrated with remote sensing, optically stimulated luminescence dating, U+Th/He dating of weathered goethite, and heavy mineral analysis. Based on this study, it...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Morphology; Sedimentology; Stratigraphy; Chronology; Tectonics; Paraíba Basin.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200007

The eolianites between Sanga do Cabral and Botucatu formations in Rio Grande do Sul State, Brazil
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: NOWATZKI,CARLOS H.; KERN,HENRIQUE P.
This paper discusses the facies distribution of Mesozoic eolian sandstones between the Sanga do Cabral and Botucatu formations and also their contact relationships, in São Leopoldo area, State of Rio Grande do Sul (RS), southern Brazil. The main distinctive characteristics regarding these sandstones and formations are the mineralogical composition, paleocurrents and the occurrence of wet interdune deposits. These interdune deposits are characterized by frequent thin mudstone layers with mudcracks, ichnofossils and salt impressions. There are also some features that resemble plant fossils. The distinctive characteristics of these sequences to Sanga do Cabral and Botucatu formations allow us to suggest the informal name of Pedreira Sandstone, considering its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stratigraphy; Paraná Basin; Mesozoic; Faciology; Paleoenvironments.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652000000200010

Seismic Stratigraphy of Pleistocene Deltaic Deposits in Bahía Blanca Estuary, Argentina
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: ALIOTTA,SALVADOR; GINSBERG,SILVIA S.; GIAGANTE,DARÍO; VECCHI,LAURA G.; SALVATIERRA,MARTA M.
The Bahía Blanca estuary (Argentina) has a morphological configuration resulting from hydrological and sedimentary processes related to Late Quaternary sea level changes. This estuarine system occupies a large coastal plain with a dense net of tidal channels, low-altitude islands and large intertidal flats. Little is known about the sedimentary units of the marine subbottom. Therefore, a stratigraphical analysis of the northern coast of Bahía Blanca estuary was carried out using high resolution seismic (3.5 kHz) in order to: i) define Quaternary sequences, ii) describe sedimentary structures, and iii) determine the paleoenvironmental conditions of sedimentation. The seismic stratigraphic data collected and their correlation with drilling lithological data...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bahía Blanca estuary; Deltaic sequences; Marine seismic; Pleistocene; Stratigraphy.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200649

Geologic conceptual model of the municipality of Sete Lagoas (MG, Brazil) and the surroundings
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: GALVÃO,PAULO; HIRATA,RICARDO; CORDEIRO,ARNALDO; BARBATI,DANIELA; PEÑARANDA,JORGE.
ABSTRACT The study area is located in the state of Minas Gerais, Brazil, among the municipalities of Pedro Leopoldo, Matozinhos, and Sete Lagoas, with Velhas River as the eastern boundary. It is located in the São Francisco Craton, where carbonated argillo-arenaceous sediments are emplaced giving origin to the Bambuí Group, in the São Francisco Basin. Despite the geological knowledge previously developed, the region needs work on integration and detailing of such information. For this reason, the main objective was to contribute to the quality of the geologic cartography, the spatial distribution, and the structural framework geometry. Thus, geologic mapping, aerial photography interpretation, and evaluation of 270 lithologic well profiles were carried...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conceptual model; Formations geometry; Geology; Stratigraphy.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100035

A reevaluation of the late quaternary sedimentation in todos os Santos Bay (BA), Brazil
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: LESSA,GUILHERME C.; BITTENCOURT,ABÍLIO C.S.P.; BRICHTA,ARNO; DOMINGUEZ,JOSÉ M. L.
Todos os Santos Bay is a large (&lt;img ALIGN="BOTTOM" BORDER="0" SRC="http:/img/fbpe/aabc/v72n4/0052img1.gif" ALT="$ \approx$"&gt; 1000 km²), structurally controlled tidal bay in northeast Brazil. Three main drainage basins debouch into the bay, providing a mean freshwater discharge of 200 m³/s (prior to 1985), or less than 1% of the spring tidal discharge through the bay mouth. Based on the result of several sedimentological studies performed in the 1970's, five surface sedimentary facies were identified inside the bay, namely i) transgressive siliciclastic marine sand facies; ii) transgressive bay sand-mud facies; iii) a transgressive carbonate marine sand facies; iv) regressive bay-mud facies, and v) regressive fluvial sand facies. The spatial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuary; Sediment; Stratigraphy; Holocene.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652000000400008