No. Registros Solicitud 1 5614 colombia



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PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1995 annual convention. Houston, TX, United States. March 5-8, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: Asia-; asthenosphere-; basins-; Chile-; China-; Colombia-; continental-crust; continental-margin; crust-; decompression-; dip-; dynamics-; Far-East; folds-; geometry-; giant-fields; heat-flow; Japan-; lithosphere-; Mexico-; oil-and-gas-fields; oxidation-; oxygen-; petroleum-; petroleum-accumulation; plate-convergence; plate-tectonics; reservoir-rocks; South-America; subduction-; United-States; variations-; Western-U.S.

CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1996-049050

UD - UPDATE CODE: 199616

Registro 4845 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Controls on the reservoir quality of the Mirador Formation, Cusiana Field, Colombia.

AU - AUTHORS: Warren-Edward-A; Pulham-Andrew-J

AF - AUTHOR AFFILIATION: BP Exploration, Sunbury on Thames, United Kingdom

BK - BOOK TITLE: In: American Association of Petroleum Geologists 1995 annual convention.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Annual Meeting Abstracts - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. 4; Pages 102. 1995.

PB - PUBLISHER: American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists. Tulsa, OK, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: American Association of Petroleum Geologists 1995 annual convention. Houston, TX, United States. March 5-8, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: cement-; Cenozoic-; clastic-rocks; Colombia-; compaction-; controls-; Cusiana-Field; eastern-Colombia; Eocene-; grain-size; lithofacies-; Llanos-; middle-Eocene; Mirador-Formation; oil-and-gas-fields; Paleogene-; permeability-; petrography-; petroleum-engineering; porosity-; production-; reservoir-properties; reservoir-rocks; sandstone-; secondary-porosity; sedimentary-rocks; South-America; Tertiary-; upper-Eocene

CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0094-0038

CO - CODEN: APGAB2

AN - ACCESSION NUMBER: 1996-049100

UD - UPDATE CODE: 199616

Registro 4846 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: The age of the Formacion Amoya, upper Magdalena Valley; another piece in the Paleozoic stratigraphic puzzle of Colombia.

AU - AUTHORS: Proessl-Klaus-F; Groesser-Joachim-R

AF - AUTHOR AFFILIATION: Univ. Giessen, Inst. Angew. Geowiss., Giessen, Federal Republic of Germany

SO - SOURCE: Newsletters on Stratigraphy. 32; 2, Pages 91-101. 1995.

PB - PUBLISHER: Gebrueder Borntraeger. Stuttgart, International. 1995.

CP - COUNTRY OF PUBLICATION: International

PY - PUBLICATION YEAR: 1995

LA - LANGUAGE: English

LS - LANGUAGE OF SUMMARY: Spanish

DE - DESCRIPTORS: Amoya-Formation; biostratigraphy-; carbonate-rocks; clastic-rocks; Colombia-; Devonian-; limestone-; Magdalena-Valley; microfossils-; miospores-; Paleozoic-; palynomorphs-; sedimentary-rocks; South-America; spores-; stratigraphic-units; stratigraphy-

CC - CATEGORY CODES: 12-Stratigraphy

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 26; illus. incl. strat. col., sect., geol. sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe, Hanover, Germany

IS - ISSN: 0078-0421

CO - CODEN: NLSGAO

AN - ACCESSION NUMBER: 1996-050112

UD - UPDATE CODE: 199617

Registro 4847 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Estimating soil losses in a Colombian watershed.

AU - AUTHORS: Smith-Ricardo-A; Botero-Adriana

AF - AUTHOR AFFILIATION: Universidad National de Colombia, Facultad de Minas, Medellin, Colombia

BK - BOOK TITLE: In: Watershed management; planning for the 21st century; proceedings.

BA - BOOK AUTHORS: Ward-Tim-J (editor)

SO - SOURCE: Pages 47-53. 1995.

PB - PUBLISHER: American Society of Civil Engineers. New York, NY, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: Watershed management; planning for the 21st century. San Antonio, TX, United States. Aug. 14-16, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: Colombia-; evaluation-; hydrology-; models-; soils-; South-America; Universal-Soil-Loss-Equation; watersheds-

CC - CATEGORY CODES: 21-Hydrogeology

DT - DOCUMENT TYPE: Book; Conference-Document

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 7; 2 tables.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IB - ISBN: 0-7844-0102-0

AN - ACCESSION NUMBER: 1996-053152

UD - UPDATE CODE: 199618

Registro 4848 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Tectonics of northwestern South America, CASA GPS measurements.

AU - AUTHORS: Mora-H; Kellogg-J-N; Freymueller-J-T; Dixon-T-H; Leffler-L

AF - AUTHOR AFFILIATION: University of South Carolina, Department of Geology, Columbia, SC, United States

BK - BOOK TITLE: In: AGU 1995 spring meeting.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Eos, Transactions, American Geophysical Union. 76; 17, Suppl., Pages 266. 1995.

PB - PUBLISHER: American Geophysical Union. Washington, DC, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: American Geophysical Union, 1995 spring meeting. Baltimore, MD, United States. May 30-June 2, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: Central-America; Colombia-; Costa-Rica; crust-; Ecuador-; Global-Positioning-System; Panama-; plate-boundaries; plate-collision; plate-tectonics; South-America; subduction-; tomography-; Venezuela-

CC - CATEGORY CODES: 18-Solid-earth-geophysics

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0096-3941

CO - CODEN: EOSTAJ

AN - ACCESSION NUMBER: 1996-056892

UD - UPDATE CODE: 199619

Registro 4849 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Melt inclusion evidence for small shallow magma chambers and open system volatile loss from modern eruptions of Nevado del Ruiz, Colombia.

AU - AUTHORS: Layne-G-D; Charland-A-P; Stix-J

AF - AUTHOR AFFILIATION: University of New Mexico, Institute of Meteoritics, Albuquerque, NM, United States

BK - BOOK TITLE: In: AGU 1995 spring meeting.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Eos, Transactions, American Geophysical Union. 76; 17, Suppl., Pages 268-269. 1995.

PB - PUBLISHER: American Geophysical Union. Washington, DC, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: American Geophysical Union, 1995 spring meeting. Baltimore, MD, United States. May 30-June 2, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: andesites-; chain-silicates; Colombia-; eruptions-; feldspar-group; framework-silicates; igneous-rocks; inclusions-; magma-chambers; magmas-; melts-; mineral-inclusions; Nevado-del-Ruiz; plagioclase-; processes-; pyroxene-group; silicates-; South-America; volcanic-rocks; volcanism-; volcanoes-

CC - CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N045300; N045300; LONG: W0752200; W0752200.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0096-3941

CO - CODEN: EOSTAJ

AN - ACCESSION NUMBER: 1996-056909

UD - UPDATE CODE: 199619

Registro 4850 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Incursion of hot mafic magma into an evolved magma chamber beneath Galeras Volcano (Colombia); eruption mechanism implied from mineral and melt inclusion geochemistry.

AU - AUTHORS: Collins-C-J; Hattori-Keiko; Stix-John

AF - AUTHOR AFFILIATION: University of Ottawa, Ottawa, ON, Canada

BK - BOOK TITLE: In: AGU 1995 spring meeting.

BA - BOOK AUTHORS: Anonymous

SO - SOURCE: Eos, Transactions, American Geophysical Union. 76; 17, Suppl., Pages 269. 1995.

PB - PUBLISHER: American Geophysical Union. Washington, DC, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: American Geophysical Union, 1995 spring meeting. Baltimore, MD, United States. May 30-June 2, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: Andes-; Colombia-; eruptions-; Galeras-; geochemistry-; inclusions-; magma-chambers; magmas-; melts-; mineral-inclusions; P-T-conditions; South-America; volcanism-; volcanoes-

CC - CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0096-3941

CO - CODEN: EOSTAJ

AN - ACCESSION NUMBER: 1996-056910

UD - UPDATE CODE: 199619

Registro 4851 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: A new date for the beginning of the Great American Faunal Interchange.

AU - AUTHORS: Campbell-K-E; Frailey-C-D

AF - AUTHOR AFFILIATION: Natural History Museum of Los Angeles County, Los Angeles, CA, United States

BK - BOOK TITLE: In: Abstracts of papers; Fifty-fifth annual meeting, Society of Vertebrate Paleontology.

BA - BOOK AUTHORS: Padian-Kevin (editor)

SO - SOURCE: Journal of Vertebrate Paleontology. 15; 3, Suppl., Pages 21. 1995.

PB - PUBLISHER: University of Oklahoma. Norman, OK, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: Society of Vertebrate Paleontology, Fifty-fifth annual meeting. Pittsburgh, PA, United States. Nov. 1-4, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: Argentina-; Artiodactyla-; biogeography-; biostratigraphy-; Camelidae-; Cenozoic-; Central-America; Chordata-; Colombia-; Cricetidae-; Eutheria-; Gomphotheriidae-; lower-Pleistocene; Mammalia-; migration-; Myomorpha-; Neogene-; new-data; North-America; paleogeography-; Panama-Canal-Zone; Peru-; Pleistocene-; Pliocene-; Proboscidea-; Quaternary-; Rodentia-; Ruminantia-; South-America; Suidae-; Suiformes-; Tertiary-; Tetrapoda-; Theria-; Tylopoda-; upper-Pliocene; Vertebrata-

CC - CATEGORY CODES: 12-Stratigraphy

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0272-4634

AN - ACCESSION NUMBER: 1996-058356

UD - UPDATE CODE: 199619

Registro 4852 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: An unusual new species of fossil snake from the La Venta fauna, Miocene of Colombia.

AU - AUTHORS: LaDuke-T-C; Hecht-M-K

AF - AUTHOR AFFILIATION: East Stroudsburg University, Department of Biological Sciences, East Stroudsburg, PA, United States

BK - BOOK TITLE: In: Abstracts of papers; Fifty-fifth annual meeting, Society of Vertebrate Paleontology.

BA - BOOK AUTHORS: Padian-Kevin (editor)

SO - SOURCE: Journal of Vertebrate Paleontology. 15; 3, Suppl., Pages 40. 1995.

PB - PUBLISHER: University of Oklahoma. Norman, OK, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: Society of Vertebrate Paleontology, Fifty-fifth annual meeting. Pittsburgh, PA, United States. Nov. 1-4, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: Alethinophidia-; Cenozoic-; Chordata-; classification-; Colombia-; Diapsida-; Friasian-; La-Venta-Formation; Lepidosauria-; Miocene-; morphology-; Neogene-; new-taxa; Reptilia-; skulls-; South-America; Tertiary-; Tetrapoda-; Vertebrata-

CC - CATEGORY CODES: 11-Vertebrate-paleontology

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0272-4634

AN - ACCESSION NUMBER: 1996-058488

UD - UPDATE CODE: 199619

Registro 4853 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Variation, phylogeny and adaptations of Miocochilius (Interatheriidae, Notoungulata) from the Miocene of Colombia.

AU - AUTHORS: Madden-R-H

AF - AUTHOR AFFILIATION: Duke University Medical Center, Department of Biological Anthropology and Anatomy, Durham, NC, United States

BK - BOOK TITLE: In: Abstracts of papers; Fifty-fifth annual meeting, Society of Vertebrate Paleontology.

BA - BOOK AUTHORS: Padian-Kevin (editor)

SO - SOURCE: Journal of Vertebrate Paleontology. 15; 3, Suppl., Pages 43. 1995.

PB - PUBLISHER: University of Oklahoma. Norman, OK, United States. 1995.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

CN - CONFERENCE INFORMATION: Society of Vertebrate Paleontology, Fifty-fifth annual meeting. Pittsburgh, PA, United States. Nov. 1-4, 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: adaptation-; Cenozoic-; Chordata-; Colombia-; diet-; Eutheria-; Honda-Group; Interatheriidae-; juvenile-taxa; Mammalia-; measurement-; Miocene-; Miocohilius-; morphology-; Neogene-; Notoungulata-; nutrition-; phylogeny-; skulls-; South-America; teeth-; Tertiary-; Tetrapoda-; Theria-; variations-; Vertebrata-

CC - CATEGORY CODES: 11-Vertebrate-paleontology

DT - DOCUMENT TYPE: Abstract; Serial; Conference-Document

BL - BIB LEVEL: Analytic

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0272-4634

AN - ACCESSION NUMBER: 1996-058509

UD - UPDATE CODE: 199619

Registro 4854 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Landslides and debris flows triggered by the 6 June 1994 Paez earthquake, southwestern Colombia.

AU - AUTHORS: Martinez-J-M; Avila-G; Agudelo-A; Schuster-R-L; Casadevall-T-J; Scott-K-M

AF - AUTHOR AFFILIATION: INGEOMINAS, Bogota, Colombia

SO - SOURCE: Landslide News. 9; Pages 13-15. 1995.

PB - PUBLISHER: Japan Landslide Society. Tokyo, Japan. 1995.

RP - RESEARCH PROGRAM: USGSOP (Non-USGS publications with USGS authors)

CP - COUNTRY OF PUBLICATION: Japan

PY - PUBLICATION YEAR: 1995

LA - LANGUAGE: English

DE - DESCRIPTORS: Cauca-Colombia; causes-; Colombia-; damage-; debris-flows; Dublin-Colombia; earthquakes-; effects-; landslides-; mass-movements; Nevado-del-Huila; Paez-earthquake-1994; Paez-Valley; seismotectonics-; slope-stability; South-America; southwestern-Colombia; tectonics-

CC - CATEGORY CODES: 30-Engineering-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N024500; N025000; LONG: W0760500; W0761000.

IL - ILLUSTRATION: Refs: 3; illus. incl. sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

IS - ISSN: 0919-5629

CO - CODEN: #02735

AN - ACCESSION NUMBER: 1996-063490

UD - UPDATE CODE: 199620

Registro 4855 de 5614 - GeoRef Disc 4: 1993-1996

BK - BOOK TITLE: Nevado del Ruiz Volcano, Colombia; magmatic system and evolution.

BA - BOOK AUTHORS: Schaefer-Stephen-Jon

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

DG - DEGREE GRANTED: Doctoral

DI - DEGREE GRANTING INSTITUTION: Arizona State University. Tempe, AZ, United States. Pages: 147. 1995.

LA - LANGUAGE: English

DE - DESCRIPTORS: Andes-; Central-Cordillera; Colombia-; crystallization-; geologic-hazards; igneous-rocks; intrusions-; magma-chambers; magmas-; mass-spectra; melting-; Nevado-del-Ruiz; Northern-Andes; petrography-; plinian-type-eruptions; pumice-; pyroclastics-; South-America; spectra-; trace-elements; vents-; volcanic-rocks; volcanoes-

CC - CATEGORY CODES: 05A-Igneous-and-metamorphic-petrology

DT - DOCUMENT TYPE: Thesis-or-Dissertation

BL - BIB LEVEL: Monograph

MC - MAP COORDINATES: LAT: N045300; N045300; LONG: W0752200; W0752200.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

AV - AVAILABILITY: University Microfilms, Ann Arbor, MI, United States

AN - ACCESSION NUMBER: 1996-063648

UD - UPDATE CODE: 199620

Registro 4856 de 5614 - GeoRef Disc 4: 1993-1996

BK - BOOK TITLE: Paleomagnetism and accretion events in the Northern Andes.

BA - BOOK AUTHORS: Estrada-Juan-Jose

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1995

DG - DEGREE GRANTED: Doctoral

DI - DEGREE GRANTING INSTITUTION: SUNY at Binghamton. Binghamton, NY, United States. Pages: 172. 1995.



LA - LANGUAGE: English

AB - ABSTRACT: New paleomagnetic results are presented from a complex of allochthonous terranes of oceanic origin, named here the Gorgona, Choco, Western (Occidental) Cordillera and Amaime, that have been accreted to the NW Andes of Colombia. The paleomagnetic data was obtained mainly from pillow basalts, although some massive flows and sedimentary horizons were also investigated. The study was extended to a series of "stitching" plutons of Late Tertiary age (10 Ma) to evaluate post accretionary structural events. These samples were demagnetized using mainly multistep thermal demagnetization procedures and to a minor extent, alternating field procedures. The Gorgona terrane, mainly below sea level, has Gorgona island as the only known exposure. This terrane is made of Mesozoic mafic and ultramafic rocks, including some komatiitic flows, probably accreted before Early Miocene. Strike-slip faulting and a break up of the originally accreted Gorgona terrane possible followed along the Buenaventura fault zone. The Choco terrane includes basic Late Mesozoic-Early Cenozoic volcanic rocks of island arc affinity in the Baudo Range; the Early Cenozoic Mande batholith and a sequence of associated volcanic rocks characterizes the Western Cordillera; and a thick Eocene-Miocene sedimentary sequence lies in the intervening Atrato-San Juan basin. The Choco terrane was accreted along the Uramita suture zone in Middle Miocene. The Western Cordillera terrane, includes most of the Western Cordillera except its NW portion. This terrane contains Cretaceous oceanic volcanic and sedimentary rocks accreted along the Cauca suture zone in Late Cretaceous-Early Tertiary. The Amaime terrane lies on the western flank of the Central Cordillera and contains Late Jurassic-Early Cretaceous oceanic basalts of possible mid-oceanic and oceanic flood affinity accreted along the Romeral suture zone in Early Cretaceous. Each one of these terranes may ultimately prove to be an assemblage of terranes. It is thought that the terranes investigated here were formed in the Pacific basin and driven into place by the motion of the Phoenix, Pacific, Farallon and Caribbean plates. The paleomagnetic results from the Gorgona terrane indicate latitudes of origin of about 30 degrees S and a clockwise tectonic rotation of 130 degrees relative to the mean of Cretaceous platform poles for South America since middle Cretaceous. The paleomagnetic results from the Choco terrane are consistent with up to 15 degrees paleolatitudes of origin. The paleomagnetic data from the Western Cordillera terrane are compatible with equatorial paleolatitudes of origin. It is estimated that this terrane formed at 2 to 4 degrees from the Equator. The paleomagnetic results from the Amaime terrane are yet to be evaluated due to the lack of bedding indicators. In this terrane the in situ orientation of the characteristic direction is I = 40.6 degrees , D = 216.2 degrees , alpha (sub 95) = 8.9 degrees . When using AMS as a proxy for bedding, the paleomagnetic results yield two possibilities: in one case the mean inclination is shallow, 0 degrees , indicating an origin close to the equator. In the other case the mean of the characteristic direction is steep, up to 40 degrees , compatible with latitudes of origin of 20 degrees . Two 40Ar-39Ar age dates from samples of the Anserma basalts have yielded 762 Ma that are younger than the expected Early Cretaceous age. The porphyritic intrusions of andesitic and dacitic compositions, are located at the north end of the Cauca Basin which lies between the Central and Western Cordilleras. They intrude the Amaime terrane near the boundary with the pre-Mesozoic continental margin and also the overlapping sediments. The results from this study indicates an unusual pattern of paleomagnetic vectors being dispersed in a vertical plane with inclinations ranging from horizontal to nearly vertical and declinations being parallel to the trend of the adjacent Romeral suture zone. Two types of rotations can be inferred from the patterns of the paleomagnetic vectors: 1) non-coherent rotations of individual bodies about horizontal axes, and 2) coherent rotation about vertical axes. These rotations come about during transpression and "kinking" of accreted rock panels migrating along the resistant buttress of the paleocontinental margin now marked by the Romeral suture zone.

DE - DESCRIPTORS: accretion-; allochthons-; Amaime-Terrane; Andes-; Atrato-San-Juan-Basin; Baudo-Range; Buenaventura-fault-zone; Caribbean-Plate; Cauca-Basin; Choco-Terrane; Cretaceous-; evolution-; Farallon-Plate; faults-; Gorgona-Terrane; magnetic-declination; magnetic-inclination; Mande-Batholith; Mesozoic-; Northern-Andes; Pacific-Plate; paleomagnetism-; Phoenix-Plate; plate-rotation; pole-positions; South-America; strike-slip-faults; suture-zones; terranes-; Western-Cordillera

CC - CATEGORY CODES: 18-Solid-earth-geophysics

DT - DOCUMENT TYPE: Thesis-or-Dissertation

BL - BIB LEVEL: Monograph

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute.

AV - AVAILABILITY: University Microfilms, Ann Arbor, MI, United States

AN - ACCESSION NUMBER: 1996-063877

UD - UPDATE CODE: 199620

Registro 4857 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Explosive volcanoes near urban areas.

AU - AUTHORS: Barberi-F

AF - AUTHOR AFFILIATION: University of Pisa, Dipartimento di Scienze della Terra, Pisa, Italy

BK - BOOK TITLE: In: International Union of Geodesy and Geophysics; XXI general assembly; abstracts.


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