No. Registros Solicitud 1 5614 colombia

AU - AUTHORS: Broad-William-J

BK - BOOK TITLE: In: The Science Times book of natural disasters.

BA - BOOK AUTHORS: Wade-Nicholas (editor)

SO - SOURCE: Pages 6-11. 2000.

PB - PUBLISHER: Lyons Press. New York, NY, United States. 2000.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 2000

LA - LANGUAGE: English

DE - DESCRIPTORS: Andes-; Colombia-; craters-; East-Pacific-Ocean-Islands; elementary-geology; explosive-eruptions; Galeras-; gases-; geologic-hazards; gravity-field; Hawaii-; Hawaii-County-Hawaii; Hawaii-Island; Kilauea-; lava-; magmas-; Oceania-; Polynesia-; South-America; United-States; vents-; volcanoes-; volcanology-

CC - CATEGORY CODES: 24-Quaternary-geology; 22-Environmental-geology

DT - DOCUMENT TYPE: Book

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N185500; N201600; LONG: W1545000; W1560500.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute.

IB - ISBN: 1-55821-957-9

AN - ACCESSION NUMBER: 2000-060768

UD - UPDATE CODE: 200019

Registro 5233 de 5614 - GeoRef 1997-2001

TI - TITLE: Geochemical study of ultramafic volcanic and plutonic rocks from Gorgona Island, Colombia; the plumbing system of an oceanic plateau.

AU - AUTHORS: Revillon-S; Arndt-N-T; Chauvel-C; Hallot-E

AF - AUTHOR AFFILIATION: Universite de Rennes, Geosciences Rennes, Rennes, France

BK - BOOK TITLE: In: In commemoration of Keith Gordon Cox, 1933-1998.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Journal of Petrology. 41; 7, Pages 1127-1153. 2000.

PB - PUBLISHER: Oxford University Press. Oxford, United Kingdom. 2000.

CP - COUNTRY OF PUBLICATION: United-Kingdom

PY - PUBLICATION YEAR: 2000

LA - LANGUAGE: English

DE - DESCRIPTORS: Colombia-; gabbros-; geochemistry-; Gorgona-Island; igneous-rocks; intrusions-; komatiite-; lava-; lithogeochemistry-; major-elements; mantle-; melting-; peridotites-; plutonic-rocks; South-America; trace-elements; ultramafic-composition; ultramafics-; volcanic-rocks

CC - CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 05A-Igneous-and-metamorphic-petrology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N030000; N030000; LONG: W0781900; W0781900.

IL - ILLUSTRATION: Refs: 60; illus. incl. 5 tables, geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute.

IS - ISSN: 0022-3530

CO - CODEN: JPTGAD

AN - ACCESSION NUMBER: 2000-059457

UD - UPDATE CODE: 200019

Registro 5234 de 5614 - GeoRef 1997-2001

TI - TITLE: Tritium and stable isotopes of magmatic waters.

AU - AUTHORS: Goff-F; McMurtry-G-M

AF - AUTHOR AFFILIATION: Los Alamos National Laboratory, Geology/Geochemistry Group, Los Alamos, NM, United States

BK - BOOK TITLE: In: Crater lakes.

BA - BOOK AUTHORS: Varekamp-Johan-C (editor); Rowe-Gary-L Jr. (editor)

SO - SOURCE: Journal of Volcanology and Geothermal Research. 97; 1-4, Pages 347-396. 2000.

PB - PUBLISHER: Elsevier. Amsterdam, Netherlands. 2000.

CP - COUNTRY OF PUBLICATION: Netherlands

PY - PUBLICATION YEAR: 2000

CN - CONFERENCE INFORMATION: Crater lakes, terrestrial degassing, and hyper-acid fluids in the environment. Crater Lake, OR, United States. Sept. 4-9, 1996.

LA - LANGUAGE: English

AB - ABSTRACT: To investigate the isotopic composition and age of water in volcanic gases and magmas, we analyzed samples from 11 active volcanoes ranging in composition from tholeiitic basalt to rhyolite: Mount St. Helens (USA), Kilauea (USA), Pacaya (Guatemala), Galeras (Colombia), Satsuma Iwo-Jima (Japan), Sierra Negra and Alcedo (Ecuador), Vulcano (Italy), Paricutin (Mexico), Kudryavy (Russia), and White Island (New Zealand). Tritium at relatively low levels (0.1-5 T.U.) is found in most emissions from high-temperature volcanic fumaroles sampled, even at discharge temperatures >700 degrees C. Although magmatic fluids sampled from these emissions usually contain high CO (sub 2) , S (sub total) , HCl, HF, B, Br, (super 3) He R/R (sub A) , and low contents of air components, stable isotope and tritium relations of nearly all such fluids show mixing of magmatic volatiles with relatively young meteoric water (model ages< or =75 y). Linear delta D/delta (super 18) O and (super 3) H/delta (super 18) O mixing trends of these two end-members are invariably detected at arc volcanoes. Tritium is also detected in fumarole condensates at hot spot basalt volcanoes, but collecting samples approaching the composition of end-member magmatic fluid is exceedingly difficult. In situ production of (super 3) H, mostly from spontaneous fission of (super 238) U in magmas is calculated to be <0.001 T.U., except for the most evolved compositions (high U, Th, and Li and low H (sub 2) O contents). These values are below the detection limit of (super 3) H by conventional analytical techniques (about 0.01 T.U. at best). We found no conclusive evidence that natural fusion in the Earth produces anomalous amounts of detectable (super 3) H (>0.05 T.U.).

DE - DESCRIPTORS: chemical-composition; gases-; geochemistry-; global-; hydrochemistry-; hydrogen-; isotope-ratios; isotopes-; magmas-; O-18-O-16; oxygen-; radioactive-isotopes; stable-isotopes; tritium-; volcanoes-; water-

CC - CATEGORY CODES: 02D-Isotope-geochemistry

DT - DOCUMENT TYPE: Serial; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 94; illus. incl. 6 tables, sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands

IS - ISSN: 0377-0273

CO - CODEN: JVGRDQ

AN - ACCESSION NUMBER: 2000-057488

UD - UPDATE CODE: 200018

Registro 5235 de 5614 - GeoRef 1997-2001

TI - TITLE: Uplift history of the Central and Northern Andes; a review.

AU - AUTHORS: Gregory-Wodzicki-Kathryn-M

AF - AUTHOR AFFILIATION: Lamont-Doherty Earth Observatory, Palisades, NY, United States

SO - SOURCE: Geological Society of America Bulletin. 112; 7, Pages 1091-1105. 2000.

PB - PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 2000.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 2000

LA - LANGUAGE: English

AB - ABSTRACT: The elevation of the Andean Cordillera is a crucial boundary condition for both climatic and tectonic studies. The Andes affect climate because they form the only barrier to atmospheric circulation in the Southern Hemisphere, and they intrigue geologists because they have the highest plateau on Earth formed at a noncollisional plate margin, the Altiplano-Puna. Yet, until recently, few quantitative studies of their uplift history existed. This study presents both (1) a review of the quantitative paleoelevation estimates that have been made for the Central and Colombian Andes and (2) an examination of the source and magnitude of error for each estimate. In the Central Andes, paleobotanical evidence suggests that the Altiplano-Puna had attained no more than a third of its modern elevation of 3700 m by 20 Ma and no more than half its modern elevation by 10.7 Ma. These data imply surface uplift on the order of 2300-3400 m since the late Miocene at uplift rates of 0.2-0.3 mm/yr. Paleobotanical and geomorphological data suggest a similar uplift history for the Eastern Cordillera--namely no more than half the modern elevation present by 10 Ma. No evidence exists for an exponential increase in uplift rate, as has been interpreted from fission-track data. These uplift rates mostly reflect mean surface uplift rather than rock uplift--that is, uplift of material points--because little dissection of the western Eastern Cordillera has occurred south of lat 19 degrees S and of the Altiplano-Puna. Thus, the Central Andean Plateau appears to be young. In the Colombian Andes, paleobotanical data imply rapid uplift of the Eastern Cordillera between 2 and 5 Ma at rates on the order of 0.6-3 mm/yr. However, some of this uplift is likely rock uplift due to erosion-driven isostatic rebound rather than mean surface uplift.

DE - DESCRIPTORS: Altiplano-; Andes-; Atacama-Desert; Cenozoic-; Central-Andes; Chile-; Colombia-; Eastern-Cordillera; elevation-; geomorphology-; morphostructures-; neotectonics-; Northern-Andes; paleoclimatology-; paleogeography-; Puna-; rates-; review-; South-America; tectonics-; uplifts-; Western-Cordillera

CC - CATEGORY CODES: 16-Structural-geology; 12-Stratigraphy

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

NN - ANNOTATION: Lamont-Doherty Earth Obs., Contrib. No. 6057.

IL - ILLUSTRATION: Refs: 136; illus. incl. 5 tables, sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States

IS - ISSN: 0016-7606

CO - CODEN: BUGMAF

AN - ACCESSION NUMBER: 2000-056001

UD - UPDATE CODE: 200018

Registro 5236 de 5614 - GeoRef 1997-2001

TI - TITLE: A comparative study of fossil and extant algaenans using ruthenium tetroxide degradation.

AU - AUTHORS: Blokker-Peter; Schouten-Stefan; de-Leeuw-Jan-W; Sinninghe-Damste-Jaap-S; van-den-Ende-Herman

AF - AUTHOR AFFILIATION: Netherlands Institute for Sea Research (NIOZ), Department of Marine Biogeochemistry and Toxicology, Texel, Netherlands

SO - SOURCE: Geochimica et Cosmochimica Acta. 64; 12, Pages 2055-2065. 2000.

PB - PUBLISHER: Pergamon. Oxford, International. 2000.

CP - COUNTRY OF PUBLICATION: International

PY - PUBLICATION YEAR: 2000

LA - LANGUAGE: English

DE - DESCRIPTORS: algae-; algaenans-; Botryococcus-braunii; Cenozoic-; Central-Europe; Chlorophyta-; Colombia-; degradation-; diagenesis-; Eocene-; Europe-; experimental-studies; fresh-water-environment; gas-chromatograms; geochemistry-; Germany-; Hesse-Germany; kerogen-; lacustrine-environment; lake-sediments; living-taxa; mass-spectra; Messel-Germany; microfossils-; oil-shale; organic-compounds; oxidation-; oxides-; Paleogene-; Pediastrum-boryanum; Plantae-; reagents-; ruthenium-tetroxide; sedimentary-rocks; sediments-; South-America; spectra-; Tertiary-; Tetraedron-minimum; Botryococcus-

CC - CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N495600; N495600; LONG: E0085900; E0085900.

NN - ANNOTATION: NIOZ Contrib. No. 3466.

IL - ILLUSTRATION: Refs: 35; illus. incl. 1 table.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute.

IS - ISSN: 0016-7037

CO - CODEN: GCACAK

AN - ACCESSION NUMBER: 2000-050920

UD - UPDATE CODE: 200017

Registro 5237 de 5614 - GeoRef 1997-2001

TI - TITLE: Occurrence of soil water repellency in arid and humid climates.

AU - AUTHORS: Jaramillo-D-F; Dekker-Louis-W; Ritsema-Coen-J; Hendrickx-J-M-H

AF - AUTHOR AFFILIATION: Universidad Nacional de Colombia, Medellin, Colombia

BK - BOOK TITLE: In: Water repellency in soils.

BA - BOOK AUTHORS: Ritsema-Coen-J (editor); Dekker-Louis-W (editor)

SO - SOURCE: Journal of Hydrology. 231-232; Pages 105-111. 2000.

PB - PUBLISHER: Elsevier. Amsterdam, Netherlands. 2000.

CP - COUNTRY OF PUBLICATION: Netherlands

PY - PUBLICATION YEAR: 2000

CN - CONFERENCE INFORMATION: Water repellency in soils. Wageningen, Netherlands. Sep. 2-4, 1998.

LA - LANGUAGE: English

AB - ABSTRACT: Soil water repellency generally tends to increase during dry weather while it decreases or completely vanishes after heavy precipitation or during extended periods with high soil water contents. These observations lead to the hypothesis that soil water repellency is common in dry climates and rare in humid climates. The study objective is to test this hypothesis by examining the occurrence of soil water repellency in an arid and humid climate. The main conclusion of this study is that the effect of climate on soil water repellency is very limited. Field observations in the arid Middle Rio Grande Basin in New Mexico (USA) and the humid Piedras Blancas Watershed in Colombia show that the main impact of climate seems to be in which manner it affects the production of organic matter. An extremely dry climate will result in low organic matter production rates and, therefore, less potential for the development of soil water repellency. On the other hand, a very humid climate is favorable for organic matter production and, therefore, for the development of water repellency.

DE - DESCRIPTORS: arid-environment; atmospheric-precipitation; climate-; Colombia-; humid-environment; hydrology-; hydrophobic-materials; infiltration-; New-Mexico; organic-compounds; Piedras-Blancas-watershed; rates-; Rio-Grande-Valley; seasonal-variations; soils-; South-America; spatial-variations; terrestrial-environment; topography-; United-States; wettability-

CC - CATEGORY CODES: 21-Hydrogeology; 25-Soils

DT - DOCUMENT TYPE: Serial; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 29; illus. incl. 3 tables.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands

IS - ISSN: 0022-1694

CO - CODEN: JHYDA7

AN - ACCESSION NUMBER: 2000-049992

UD - UPDATE CODE: 200016

Registro 5238 de 5614 - GeoRef 1997-2001

TI - TITLE: Neogene and Quaternary history of vegetation, climate, and plant diversity in Amazonia.

AU - AUTHORS: van-der-Hammen-Thomas; Hooghiemstra-Henry

AF - AUTHOR AFFILIATION: University of Amsterdam, Department of Palynology and Paleo/Actuo-Ecology, Amsterdam, Netherlands

SO - SOURCE: Quaternary Science Reviews. 19; 8, Pages 725-742. 2000.

PB - PUBLISHER: Pergamon. Oxford, United Kingdom. 2000.

CP - COUNTRY OF PUBLICATION: United-Kingdom

PY - PUBLICATION YEAR: 2000

LA - LANGUAGE: English

AB - ABSTRACT: The neotropical Amazonian and Andean plant diversity developed mainly during the Tertiary. In Amazonia, Miocene floral diversity seems considerably higher than today. During the Neogene, tropical taxa entered newly created montane area, and montane taxa entered the tropical lowlands. The general decrease of temperature during the upper Neogene and especially during the Quaternary glacial periods may have caused considerable extinctions in the lowlands. Representation of pollen of apparently principally montane taxa (Podocarpus, Hedyosmum) in Miocene, Pliocene, and Quaternary sediments of Amazonia and surroundings, is still difficult to interpret in terms of temperature decrease at low elevation. Changes in precipitation may have profound impact on the composition of vegetation communities; Ilex and Melastomataceae increase significantly in many glacial pollen records. Increase of Weinmannia in Amazonian pollen records seems the best indicator of downward migration of montane vegetation belts. A temperature lowering at sea-level of 4.5+ or -1 degrees C during the Last Glacial Maximum (LGM) seems reasonable; it may have caused a downslope migration of some 700 m of the lower montane vegetation belt; lower montane arboreal species may have been able to grow in higher elevation areas (>500 m) of Amazonia, increasing background pollen values of montane taxa in the area. Difference between a cool and wet Middle Pleniglacial (60-28 ka BP), and a cold and dry Upper Pleniglacial (28-14 ka BP; thus including the LGM) is evident in Andean and Amazonian records; statements about environmental conditions of the ice-age Amazon should be specified chronologically. The Middle Pleniglacial is a time of accumulation of fluvial sediments. The Upper Pleniglacial is a time of incision of the rivers in their sediments; sedimentation started again in the Lateglacial (since ca. 13 ka BP) and the Holocene, when lake levels rose again. Based on simplified considerations of precipitation changes and evaporation we estimate that LGM rainfall may have been reduced by values of ca. 45(+ or -10%); Amazonian and Cordilleran lakes dried up; dry rain forest was locally replaced by savanna, savanna forest, or cerrado-type vegetation; dry rain forest, savanna forest, and pure savanna was locally replaced by extensive semi-desert dune formations (lower Rio Branco area in present-day central Amazonia). The present-day centers of higher rainfall (>2500 mm) surrounded by areas of lower rainfall, are refuge areas of the very wet rain forest and of the very high plant diversity (300 plant species per 0.1 ha), and they should have been that equally, or more, during the dry climate intervals (plant diversity of drier forests is in the order of 100-150 species per 0.1 ha). Both extinction and speciation in isolation under precipitation and temperature stress may have taken place in these refugia.

DE - DESCRIPTORS: Amazon-Basin; Andes-; biodiversity-; Brazil-; Cenozoic-; Colombia-; Ecuador-; evaporation-; extinction-; fluvial-sedimentation; glacial-environment; Guyana-; Hedyosmum-; Ilex-; lake-level-changes; last-glacial-maximum; Melastomataceae-; microfossils-; miospores-; Neogene-; paleoclimatology-; paleoenvironment-; paleohydrology-; paleotemperature-; palynomorphs-; patterns-; Plantae-; Podocarpus-; pollen-; Quaternary-; reconstruction-; sedimentation-; South-America; speciation-; species-diversity; Surinam-; Tertiary-; vegetation-; Weinmannia-

CC - CATEGORY CODES: 12-Stratigraphy; 09-Paleobotany

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 104; illus. incl. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute.

IS - ISSN: 0277-3791

AN - ACCESSION NUMBER: 2000-048652

UD - UPDATE CODE: 200016

Registro 5239 de 5614 - GeoRef 1997-2001

TI - TITLE: Morphometry of late Pleistocene-Holocene faulting and volcanotectonic relationship in the Southern Andes of Colombia.

AU - AUTHORS: Tibaldi-Alessandro; Leon-Jaime-Romero

AF - AUTHOR AFFILIATION: University of Milan-Bicocca, Department of Geological Sciences and Geotechnologies, Milan, Italy

SO - SOURCE: Tectonics. 19; 2, Pages 358-377. 2000.

PB - PUBLISHER: American Geophysical Union. Washington, DC, United States. 2000.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 2000

LA - LANGUAGE: English

DE - DESCRIPTORS: Andes-; Buesaco-Fault; Cenozoic-; Colombia-; cracks-; faults-; geometry-; Holocene-; morphometry-; movement-; neotectonics-; Northern-Andes; orientation-; Pleistocene-; Quaternary-; seismicity-; slip-rates; South-America; stress-; tectonics-; upper-Pleistocene; volcanism-

CC - CATEGORY CODES: 24-Quaternary-geology; 16-Structural-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N010000; N013000; LONG: W0771000; W0773000.

IL - ILLUSTRATION: Refs: 60; illus. incl. sect., geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute.

IS - ISSN: 0278-7407

CO - CODEN: TCTNDM

AN - ACCESSION NUMBER: 2000-041887

UD - UPDATE CODE: 200014

Registro 5240 de 5614 - GeoRef 1997-2001

TI - TITLE: Paleoenvironmental history of the Popayan area since 27 000 yr BP at Timbio, southern Colombia.

AU - AUTHORS: Wille-M; Negret-J-A; Hooghiemstra-H

AF - AUTHOR AFFILIATION: University of Amsterdam, Hugo de Vries Laboratory, Amsterdam, Netherlands

SO - SOURCE: Review of Palaeobotany and Palynology. 109; 1, Pages 45-63. 2000.

PB - PUBLISHER: Elsevier. Amsterdam, Netherlands. 2000.

CP - COUNTRY OF PUBLICATION: Netherlands

PY - PUBLICATION YEAR: 2000

LA - LANGUAGE: English

AB - ABSTRACT: A pollen record from Timbio, located at an elevation of 1750 m on the high plain of Popayan (2 degrees 24'N, 76 degrees 36'W) is presented. This forms the basis for reconstructing the vegetation and climate history for the periods from 27000 to 9200 radiocarbon years before the present ( (super 14) C yr BP) and 2100 (super 14) Cyr BP to sub-recent. The 5 m sediment core has time control based on seven AMS radiocarbon dates. Four pollen assemblage zones (TIM-1 to TIM-4) are recognized. During the period of 27200 to 26000 (super 14) C yr BP, an Andean forest was near the site. The vegetation consisted of forest and open herb-rich vegetation, climatic conditions were moist and temperatures some 6 degrees C lower than compared to those of today. During the period of 26000 to 16000 (super 14) Cyr BP forest was less open. The observed succession from a Podocarpus-Weinmannia dominated forest to a Hedyosmum dominated forest, and finally to a forest with Ilex, Myrica and ferns indicates a progressive decrease of temperature during this period, with a maximum temperature depression of ca. 5-7.5 degrees C compared to present-day conditions. During the period of 16000 to 9200 (super 14) C yr BP, temperature decrease is estimated at ca. 7.5 degrees C and the climate was the driest. During the period of 2100 to 600 (super 14) C yr BP, deforestation and crop cultivation point to significant human influence, subsequently followed by a period of forest recovery that started before the arrival of the Spanish conquistadors. The estimated temperature depression at the Last Glacial Maximum (LGM, ca. 6.5 degrees C) is between the estimated values at >2600 m altitude (ca. 8 degrees C) and those at sea-level (2.5-6 degrees C) and supports the observation that glacial lapse rates were higher than in modern times.

DE - DESCRIPTORS: absolute-age; biostratigraphy-; biozones-; C-14; carbon-; Cenozoic-; climate-change; Colombia-; cores-; dates-; deforestation-; ecology-; floral-list; glacial-environment; human-activity; isotopes-; miospores-; paleoclimatology-; paleoecology-; paleoenvironment-; palynomorphs-; plains-; Plantae-; pollen-; pollen-analysis; Popayan-Colombia; postglacial-environment; Quaternary-; radioactive-isotopes; South-America; southern-Colombia; terrestrial-environment; Timbio-Colombia; upper-Quaternary; vegetation-

CC - CATEGORY CODES: 24-Quaternary-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N022400; N022400; LONG: W0763600; W0763600.

IL - ILLUSTRATION: Refs: 29; illus. incl. chart, 3 tables, sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2002, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands

IS - ISSN: 0034-6667

CO - CODEN: RPPYAX

AN - ACCESSION NUMBER: 2000-039078

UD - UPDATE CODE: 200013

Registro 5241 de 5614 - GeoRef 1997-2001

TI - TITLE: A forgotten episode in the history of dinosaur ichnology; Carl Degenhardt's report on the first discovery of fossil footprints in South America (Colombia, 1839).

AU - AUTHORS: Buffetaut-Eric

AF - AUTHOR AFFILIATION: CNRS, Paris, France

SO - SOURCE: Bulletin de la Societe Geologique de France. 171; 1, Pages 137-140. 2000.

PB - PUBLISHER: Societe Geologique de France. Paris, France. 2000.

CP - COUNTRY OF PUBLICATION: France

PY - PUBLICATION YEAR: 2000

LA - LANGUAGE: English

LS - LANGUAGE OF SUMMARY: French

AB - ABSTRACT: The first fossil footprints to be reported from South America were found in Colombia by Carl Degenhardt in 1839. Although he identified them as bird footprints, his brief description suggests that they were tracks of bipedal dinosaurs (probably theropods). This important episode in the history of palaeoichnology has been almost completely forgotten, probably because Degenhardt's original report was published in a geographical, rather than geological, journal, and because later references to his find erroneously placed it in Mexico instead of Colombia.