No. Registros Solicitud 1 5614 colombia



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

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 81; illus. incl. block diag., sects., strat. cols., 2 tables, geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands

IS - ISSN: 0040-1951

CO - CODEN: TCTOAM

AN - ACCESSION NUMBER: 1994-017797

UD - UPDATE CODE: 199408

Registro 4894 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Pleistocene evolution of orbital periodicities in the high-resolution pollen record Funza I, Eastern Cordillera, Colombia.

AU - AUTHORS: Hooghiemstra-H; Melice-J-L

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

BK - BOOK TITLE: In: Orbital forcing and cyclic sequences.

BA - BOOK AUTHORS: de-Boer-P-L (editor); Smith-D-G (editor)

SO - SOURCE: Special Publication of the International Association of Sedimentologists. 19; Pages 117-126. 1994.

PB - PUBLISHER: Blackwell. Oxford, International. 1994.

CP - COUNTRY OF PUBLICATION: International

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: Andes-; basins-; Bogota-Colombia; Cenozoic-; Colombia-; data-processing; Eastern-Cordillera; eccentricity-; fission-track-dating; geochronology-; microfossils-; orbital-forcing; paleoclimatology-; palynomorphs-; periodicity-; Pleistocene-; precession-; Quaternary-; sedimentary-basins; South-America; spectral-analysis; statistical-analysis; time-series-analysis; variations-; vegetation-

CC - CATEGORY CODES: 24-Quaternary-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 20; illus. incl. sect., sketch map.

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

IS - ISSN: 0141-3600

CO - CODEN: SPISDS

AN - ACCESSION NUMBER: 1994-023012

UD - UPDATE CODE: 199411

Registro 4895 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Geochemistry of platinum-group elements of the zoned ultramafic Alto Condoto Complex, Northwest Colombia.

AU - AUTHORS: Tistl-M

AF - AUTHOR AFFILIATION: Ostpreussendamm 182 b, Berlin, Federal Republic of Germany

SO - SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 89; 1, Pages 158-167. 1994.

PB - PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: alloys-; Alto-Condoto-Complex; chemical-composition; Colombia-; crystallization-; cumulates-; dunite-; fractional-crystallization; geochemistry-; hornblendite-; igneous-rocks; intrusions-; magmas-; major-elements; metal-ores; metals-; mineral-composition; northwestern-Colombia; peridotites-; platinum-group; platinum-ores; plutonic-rocks; precipitation-; South-America; ultramafics-; zoning-

CC - CATEGORY CODES: 27A-Economic-geology,-geology-of-ore-deposits; 02C-Geochemistry-of-rocks,-soils,-and-sediments

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 29; illus. incl. 4 tables, sketch maps.

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

IS - ISSN: 0361-0128

CO - CODEN: ECGLAL

AN - ACCESSION NUMBER: 1994-026001

UD - UPDATE CODE: 199412

Registro 4896 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Tectonic implications of tomographic images of subducted lithosphere beneath northwestern South America.

AU - AUTHORS: van-der-Hilst-Rob; Mann-Paul

AF - AUTHOR AFFILIATION: Australian National University, Research School of Earth Sciences, Canberra, Australia

SO - SOURCE: Geology (Boulder). 22; 5, Pages 451-454. 1994.

PB - PUBLISHER: Geological Society of America (GSA). Boulder, CO, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

AB - ABSTRACT: We used seismic tomography to investigate the complex structure of the upper mantle below northwestern South America. Images of slab structure not delineated by previous seismicity studies help us to refine existing tectonic models of subducted Caribbean-Pacific lithosphere beneath the study area. Beneath western Venezuela and Colombia we distinguish two slabs: a Maracaibo and a (redefined) Bucaramanga slab. The Maracaibo slab, coinciding with most of the Bucaramanga slab previously defined by W. D. Pennington, dips in a direction of 150 degrees at an angle of 17 degrees to a depth of 275 km and correlates to the subducted Late Cretaceous oceanic plateau of the Caribbean plate. Farther south, a second slab dips at an angle of 50 degrees in a direction of 125 degrees to a depth of at least 500 km and correlates to the subducted oceanic crust of the Nazca plate and the downdip extension of the Panama island arc. We refer to this slab as the redefined Bucaramanga slab, because it is different from the Bucaramanga slab segment defined by Pennington. The area of the South American plate overriding both slabs is characterized by the absence of an active volcanic arc, an anomalously wide topographically uplifted and tectonically active area, and the northward escape of the Maracaibo block along active strike-slip faults. In support of earlier studies, we attribute this to the underthrusting of the Caribbean oceanic plateau (our shallowly dipping Maracaibo slab) along the base of the South American lithosphere and to the recent collision of the Panama island arc rafted in on more steeply dipping crust of the Nazca plate (our redefined Bucaramanga slab).

DE - DESCRIPTORS: Bucaramanga-Slab; Caribbean-Plate; Caribbean-region; Colombia-; crust-; dip-; inverse-problem; iterative-methods; lithosphere-; mantle-; Maracaibo-Slab; Nazca-Plate; northwestern-South-America; oceanic-crust; Pacific-Ocean; plate-boundaries; plate-collision; plate-tectonics; seismology-; slabs-; South-America; South-American-Plate; subduction-; three-dimensional-models; tomography-; traveltime-residuals; upper-mantle; Venezuela-

CC - CATEGORY CODES: 18-Solid-earth-geophysics; 19-Seismology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 16; illus. incl. block diag., sketch maps.

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

IS - ISSN: 0091-7613

CO - CODEN: GLGYBA

AN - ACCESSION NUMBER: 1994-026291

UD - UPDATE CODE: 199412

Registro 4897 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Time-pressure and temperature constraints on the formation of Colombian emeralds; an (super 40) Ar/ (super 39) Ar laser microprobe and fluid inclusion study.

AU - AUTHORS: Cheilletz-A; Feraud-G; Giuliani-G; Rodriguez-C-T

AF - AUTHOR AFFILIATION: Centre de Recherches Petrographiques et Geochimiques, Vandoeuvre-les Nancy, France

SO - SOURCE: Economic Geology and the Bulletin of the Society of Economic Geologists. 89; 2, Pages 361-380. 1994.

PB - PUBLISHER: Economic Geology Publishing Company. Lancaster, PA, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: absolute-age; Andes-; Ar-40-Ar-39; Ar-Ar; argon-; C-13-C-12; carbon-; Cenozoic-; Colombia-; confining-pressure; Coscuez-Deposit; Coscuez-Mine; crustal-shortening; dates-; Eastern-Cordillera; electron-probe-data; emerald-; epigene-processes; evolution-; fluid-inclusions; gems-; hydrothermal-alteration; hydrothermal-processes; inclusions-; isotope-ratios; isotopes-; K-Ar; laser-methods; lithostatic-pressure; lithostratigraphy-; major-elements; metasomatism-; mineral-assemblages; mineral-deposits,-genesis; noble-gases; O-18-O-16; Oligocene-; ore-forming-fluids; oxygen-; P-T-conditions; Paleogene-; paleosalinity-; paragenesis-; petrography-; Quipama-Mine; Quipama-Muzo-Deposit; radioactive-isotopes; reconstruction-; ring-silicates; S-34-S-32; SEM-data; silicates-; South-America; stable-isotopes; sulfur-; Tertiary-; thin-sections; trace-elements; X-ray-diffraction-data

CC - CATEGORY CODES: 28A-Economic-geology,-geology-of-nonmetal-deposits

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

NN - ANNOTATION: CRPG, Contrib. No. 940.

IL - ILLUSTRATION: Refs: 75; illus. incl. block diags., chart, strat. col., 4 tables, sketch map.

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

IS - ISSN: 0361-0128

CO - CODEN: ECGLAL

AN - ACCESSION NUMBER: 1994-028375

UD - UPDATE CODE: 199413

Registro 4898 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Colombia; 2, Southern Colombia's Putumayo Basin deserves renewed attention.

AU - AUTHORS: Matthews-Andrew-J; Portilla-Omar

AF - AUTHOR AFFILIATION: Intera Information Technologies, Henley, United Kingdom

SO - SOURCE: Oil and Gas Journal. 92; 21, Pages 85-88. 1994.

PB - PUBLISHER: PennWell. Tulsa, OK, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: Caballos-Sandstone; carbon-; Cenozoic-; Colombia-; Cretaceous-; Eocene-; geophysical-profiles; kerogen-; Mesozoic-; organic-carbon; organic-compounds; organic-materials; Paleogene-; Pepino-Conglomerate; permeability-; petroleum-; petroleum-exploration; porosity-; Putumayo-Basin; seismic-profiles; source-rocks; South-America; southern-Colombia; stratigraphic-traps; structural-traps; Tertiary-; traps-; Villetta-Formation

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

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 4; sects., strat. col., sketch map.

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

IS - ISSN: 0030-1388

CO - CODEN: OIGJAV

AN - ACCESSION NUMBER: 1994-030754

UD - UPDATE CODE: 199414

Registro 4899 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Geochemical zonation of volcanic rocks and deep structure of Ecuador and southern Colombia.

AU - AUTHORS: Vanek-J; Vankova-V; Hanus-V

AF - AUTHOR AFFILIATION: Geophysical Institute, Czech Academy of Science, Prague, Czechoslovakia

SO - SOURCE: Journal of South American Earth Sciences. 7; 1, Pages 57-67. 1994.

PB - PUBLISHER: Pergamon. Oxford, United Kingdom. 1994.

CP - COUNTRY OF PUBLICATION: United-Kingdom

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

LS - LANGUAGE OF SUMMARY: Spanish

DE - DESCRIPTORS: Andes-; andesites-; Benioff-zone; chemical-composition; Cocos-Plate; Colombia-; dacites-; deep-seated-structures; East-Pacific; Ecuador-; Esmeraldas-Rio-Curaray-fracture-zone; fracture-zones; igneous-rocks; Nazca-Plate; Northern-Andes; Pacific-Ocean; Pelileo-Zunac-fracture-zone; Peru-Chile-Trench; plate-boundaries; plate-tectonics; South-America; South-American-Plate; subduction-zones; volcanic-centers; volcanic-features; volcanic-rocks; zoning-

CC - CATEGORY CODES: 02C-Geochemistry-of-rocks,-soils,-and-sediments; 18-Solid-earth-geophysics

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: S020000; N013000; LONG: W0770000; W0790000.

IL - ILLUSTRATION: Refs: 18; illus. incl. 3 tables.

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

IS - ISSN: 0895-9811

AN - ACCESSION NUMBER: 1994-032222

UD - UPDATE CODE: 199415

Registro 4900 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: The Moses rod; ground water in generation of deep-seated landslides.

AU - AUTHORS: Hoyos-Patino-Fabian; Velez-Jaime-Ignacio; Velez-Maria-Victoria

AF - AUTHOR AFFILIATION: Universidad Nacional de Colombia, Department of Civil Engineering, Medellin, Colombia

SO - SOURCE: Bulletin of the Association of Engineering Geologists. 31; 1, Pages 133-140. 1994.

PB - PUBLISHER: Association of Engineering Geologists. Dallas, TX, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: Aburra-Valley; Colombia-; ground-water; landslides-; mass-movements; pressure-; recharge-; slope-stability; South-America; water-pressure

CC - CATEGORY CODES: 30-Engineering-geology; 21-Hydrogeology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 20; illus. incl. sketch map.

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

IS - ISSN: 0004-5691

CO - CODEN: ENGEA9

AN - ACCESSION NUMBER: 1994-032256

UD - UPDATE CODE: 199415

Registro 4901 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Heavy-metals in stream sediments; a gold-mining area near Los Andes, southern Colombia, S.A.

AU - AUTHORS: Groesser-Joachim-R; Hagelgans-Volker; Hentschel-Thomas; Priester-Michael

AF - AUTHOR AFFILIATION: Giessen University, Giessen, Federal Republic of Germany

SO - SOURCE: Ambio. 23; 2, Pages 146-149. 1994.

PB - PUBLISHER: Universitetsforlaget. Oslo, Norway. 1994.

CP - COUNTRY OF PUBLICATION: Norway

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: arsenic-; cadmium-; chemical-composition; chromium-; Colombia-; gold-ores; ground-water; heavy-metals; lead-; mercury-; metal-ores; metals-; mining-; Narino-Colombia; nickel-; pollutants-; pollution-; remediation-; Rio-Patia; South-America; southern-Colombia; stream-sediments; surface-water; tailings-; trace-elements; water-quality; zinc-

CC - CATEGORY CODES: 22-Environmental-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N010000; N014500; LONG: W0773000; W0783000.

IL - ILLUSTRATION: Refs: 16; illus. incl. 4 tables, sketch maps.

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

IS - ISSN: 0044-7447

CO - CODEN: AMBOCX

AN - ACCESSION NUMBER: 1994-032492

UD - UPDATE CODE: 199415

Registro 4902 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Colombia; 1, Old, new plays may revitalize Colombia's Llanos Basin.

AU - AUTHORS: Keeley-Martin-C; Castro-Arevalo-Egon

AF - AUTHOR AFFILIATION: Consultant, Leighton Buzzard, United Kingdom

SO - SOURCE: Oil and Gas Journal. 92; 20, Pages 66-69. 1994.

PB - PUBLISHER: PennWell. Tulsa, OK, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: Cano-Limon-La-Yuca-Field; Cenozoic-; Colombia-; Cretaceous-; Cusiana-Cupiagua-Field; evaluation-; faults-; geophysical-profiles; giant-fields; grabens-; Llanos-; Mesozoic-; oil-and-gas-fields; petroleum-; petroleum-exploration; possibilities-; seismic-profiles; South-America; strike-slip-faults; structural-traps; Tertiary-; thrust-faults; traps-

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

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: chart, sects., sketch map.

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

IS - ISSN: 0030-1388

CO - CODEN: OIGJAV

AN - ACCESSION NUMBER: 1994-032701

UD - UPDATE CODE: 199415

Registro 4903 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Colombia; 3, Upper Magdalena Valley Basin in Colombia has new play potential.

AU - AUTHORS: Maslanyj-Myron-P; Pena-Luis-E

AF - AUTHOR AFFILIATION: Intera Information Technologies, Henley, United Kingdom

SO - SOURCE: Oil and Gas Journal. 92; 22, Pages 93-96. 1994.

PB - PUBLISHER: PennWell. Tulsa, OK, United States. 1994.

CP - COUNTRY OF PUBLICATION: United-States

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: Andes-; Caballos-Formation; chronostratigraphy-; Colombia-; Cretaceous-; cycles-; Eastern-Cordillera; geophysical-profiles; La-Luna-Formation; marine-environment; Mesozoic-; Monserrate-Formation; Natagaima-High; petroleum-; petroleum-exploration; regression-; reservoir-rocks; sea-level-changes; seismic-profiles; source-rocks; South-America; stratigraphic-traps; structural-traps; transgression-; traps-; Upper-Cretaceous; Upper-Magdalena-Valley-Basin; Villeta-Formation

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

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 2; chart, sects., sketch map.

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

IS - ISSN: 0030-1388

CO - CODEN: OIGJAV

AN - ACCESSION NUMBER: 1994-033090

UD - UPDATE CODE: 199415

Registro 4904 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Geology; the new treasure seekers.

AU - AUTHORS: Fallick-Anthony-E

AF - AUTHOR AFFILIATION: Scottish Universities Research and Reactor Centre, Isotope Geosciences Unit, East Kilbride, Glasgow, United Kingdom

SO - SOURCE: Nature (London). 369; 6481, Pages 522-523. 1994.

PB - PUBLISHER: Macmillan Journals. London, United Kingdom. 1994.

CP - COUNTRY OF PUBLICATION: United-Kingdom

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: Colombia-; critical-review; emerald-; gems-; hydrothermal-alteration; hydrothermal-processes; metasomatism-; mineral-deposits,-genesis; ring-silicates; silicates-; South-America

CC - CATEGORY CODES: 28A-Economic-geology,-geology-of-nonmetal-deposits

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 12

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

IS - ISSN: 0028-0836

CO - CODEN: NATUAS

AN - ACCESSION NUMBER: 1994-033827

UD - UPDATE CODE: 199416

Registro 4905 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Formation of the Muzo hydrothermal emerald deposit in Colombia.

AU - AUTHORS: Ottaway-T-L; Wicks-F-J; Bryndzia-L-T; Kyser-T-K; Spooner-E-T-C

AF - AUTHOR AFFILIATION: Royal Ontario Museum, Department of Mineralogy, Toronto, ON, Canada

SO - SOURCE: Nature (London). 369; 6481, Pages 552-554. 1994.

PB - PUBLISHER: Macmillan Journals. London, United Kingdom. 1994.

CP - COUNTRY OF PUBLICATION: United-Kingdom

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

DE - DESCRIPTORS: alkaline-earth-metals; beryllium-; black-shale; brines-; chromium-; clastic-rocks; Colombia-; emerald-; gems-; geochemical-controls; host-rocks; hydrothermal-alteration; hydrothermal-processes; metals-; metasomatism-; mineral-deposits,-genesis; Muzo-Deposit; ore-transport; organic-compounds; organic-materials; ring-silicates; sedimentary-rocks; silicates-; South-America; sulfur-; vanadium-; veins-

CC - CATEGORY CODES: 28A-Economic-geology,-geology-of-nonmetal-deposits; 02A-General-geochemistry

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 19; illus. incl. block diag.

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

IS - ISSN: 0028-0836

CO - CODEN: NATUAS

AN - ACCESSION NUMBER: 1994-033830

UD - UPDATE CODE: 199416

Registro 4906 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Fluvial palaeoenvironments in the intracratonic Amazonas Basin (early Miocene-early middle Miocene, Colombia).

AU - AUTHORS: Hoorn-Carina

AF - AUTHOR AFFILIATION: University of Amsterdam, Amsterdam, Netherlands

SO - SOURCE: Palaeogeography, Palaeoclimatology, Palaeoecology. 109; 1, Pages 1-54. 1994.

PB - PUBLISHER: Elsevier. Amsterdam, Netherlands. 1994.

CP - COUNTRY OF PUBLICATION: Netherlands

PY - PUBLICATION YEAR: 1994

LA - LANGUAGE: English

AB - ABSTRACT: Based on a detailed study of Early Miocene to early Middle Miocene sediments in the Caqueta River area (Amazonas Basin, Colombia), a reconstruction of the palaeoenvironmental and palaeogeographical history is made. Sediment composition, sedimentary sequences and transport directions indicate that the succession was deposited by a low sinuosity fluvial system with an anastomosing character that originated from the Guyana Shield. Basin subsidence, Precambrian and Palaeozoic palaeorelief, and a changing base level controlled deposition in this fluvial system. Sedimentary environments such as channels, abandoned channels, crevasse splays, backswamps and palaeosoils characterized this system where fluvial flooding was common. The Early Miocene to early Middle Miocene sequences have been truncated by a more recent fluvial system, probably of Pliocene to Pleistocene age, representing the precursor of the present Caqueta River. Palynological analysis suggest that the sediments are part of the Retitricolporites and the Psiladiporites-Crototricolpites pollen zones. Fifteen new species are described which belong to the genera: Psilatricolpites, Retitricolpites, Retitricolporites, Bombacacidites, Syncolporites and Psilastephanocolporites. The palynological assemblages indicate that the area was characterized by palm swamps, riparian vegetation and a rather diverse tropical forest. Intervals rich in marine palynomorphs accompanied by high concentrations of mangrove pollen grains (Zonocostites) suggest periods of marine influences and mangrove development. It is thought that the marine intervals are related to the Late Burdigalian transgression.

DE - DESCRIPTORS: Amazon-Basin; assemblages-; biostratigraphy-; Bombacacidites-; Caqueta-River; Cenozoic-; Colombia-; Crototricolpites-; deposition-; distribution-; fluvial-environment; interpretation-; lithofacies-; lower-Miocene; microfossils-; middle-Miocene; Miocene-; miospores-; Neogene-; new-taxa; paleoenvironment-; paleogeography-; palynomorphs-; pollen-; pollen-diagrams; Psiladiporites-; Psilastephanocolporites-; Psilatricolpites-; reconstruction-; Retitricolporites-; sediment-transport; South-America; Syncolporites-; Tertiary-; tropical-environment; Zonocostites-

CC - CATEGORY CODES: 12-Stratigraphy

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 95; illus. incl. strat. cols., geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands

IS - ISSN: 0031-0182

CO - CODEN: PPPYAB

AN - ACCESSION NUMBER: 1994-038605

UD - UPDATE CODE: 199418

Registro 4907 de 5614 - GeoRef Disc 4: 1993-1996

TI - TITLE: Application of off-the-shelf graphics and other software for making geologic maps and processing structural data, with examples from the crystalline Southern Appalachians and Colombian Andes.

AU - AUTHORS: Carter-M-W; Davis-T-L; Geddes-D-J; Hatcher-R-D Jr.; Martin-S-L; McClanahan-D-G; Montes-C; Yanagihara-G-M

AF - AUTHOR AFFILIATION: University of Tennessee, Department of Geological Sciences, Knoxville, TN, United States

BK - BOOK TITLE: In: Geological Society of America, Southeastern Section, 43rd annual meeting.

BA - BOOK AUTHORS: Anonymous


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