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.
Share with your friends: |