UD - UPDATE CODE: 1967
Registro 2906 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Las estructuras del valle medio del Magdalena y su significacion.
AU - AUTHORS: Julivert-M
SO - SOURCE: Boletin de Geologia (Bucaramanga). 6; Pages 33-52. 1961.
PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1961.
CP - COUNTRY OF PUBLICATION: Colombia
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: Spanish
LS - LANGUAGE OF SUMMARY: English; French
AB - ABSTRACT: The middle Magdalena valley is a half-graben downfaulted on the east along the Salinas fault. Principal structures within the graben are a gentle anticline with crestal normal faults and a bounding thrust fault. Tectonic strike is north-northeast. Analysis of the structures indicates that folds were initiated early in the Tertiary and developed continuously throughout the Tertiary, basement control always being important. Continuous sedimentation throughout the Tertiary indicates that sites of present anticlines were at times positive and received less total sediment than adjacent synclines which were always sites of subsidence. As a result local angular unconformities are developed over the anticlines whereas sedimentation is complete and conformable in the synclines. On the flanks of folds there are progressive unconformities and pinching out of beds. The unconformity between the Cretaceous and Tertiary is significant and extensive. Both structural and stratigraphic oil traps control the accumulation of petroleum. Among the large oil fields in this region are the Casabe, La Cira, and Cantagallo fields.
DE - DESCRIPTORS: Cenozoic-; Colombia-; Cretaceous-; faults-; grabens-; Magdalena-Valley; Mesozoic-; occurrences-; petroleum-; South-America; structural-and-stratigraphic-traps; structural-geology; tectonics-; Tertiary-
CC - CATEGORY CODES: 29-Economic-geology-of-energy-sources
DT - DOCUMENT TYPE: Serial; Map
BL - BIB LEVEL: Analytic
MS - MAP SCALE: 1:100,000
IL - ILLUSTRATION: illus. incl. colored geol. map .
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0120-0283
CO - CODEN: UISBAV
AN - ACCESSION NUMBER: 1967-002614
UD - UPDATE CODE: 1967
Registro 2907 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Observaciones sobre el cuaternario de la sabana de Bogota.
AU - AUTHORS: Julivert-M
SO - SOURCE: Boletin de Geologia (Bucaramanga). 7; Pages 5-34. 1961.
PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1961.
CP - COUNTRY OF PUBLICATION: Colombia
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: Spanish
LS - LANGUAGE OF SUMMARY: English; French
AB - ABSTRACT: The Bogota plateau is the bed of an ancient lake in which 200 meters of Quaternary sediments were deposited. The following members can be distinguished in this sedimentary sequence: a fluvioglacial? deposit consisting of large boulders which outcrops in the valley of the Tunjuelo river and forms several cones which coalesce in the bottom of the valley; a thick lacustrine deposit, the Tilata formation, composed of white clays, sands, peat, and pebble horizons which reaches a thickness of 120 meters, and which is expressed morphologically by a terrace 5 to 15 meters above the rivers of the plateau; and the Sabana formation, a silt complex along the borders of the plateau which is red and brown with a black soil cover.
DE - DESCRIPTORS: Cenozoic-; Colombia-; environment-; extinct-lakes; geomorphology-; lacustrine-features; Lake-; lake-deposits; paleogeography-; Quaternary-; Sabana-de-Bogota; sediments-; South-America; stratigraphy-; terraces-
CC - CATEGORY CODES: 12-Stratigraphy; 23-Geomorphology
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
IL - ILLUSTRATION: illus. incl. geol. map.
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0120-0283
CO - CODEN: UISBAV
AN - ACCESSION NUMBER: 1967-002615
UD - UPDATE CODE: 1967
Registro 2908 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: La posicion estratigrafica de la fauna de mamferos del pleistoceno de la sabana de Bogota.
AU - AUTHORS: Porta-Jaime-de
SO - SOURCE: Boletin de Geologia (Bucaramanga). 7; Pages 37-54. 1961.
PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1961.
CP - COUNTRY OF PUBLICATION: Colombia
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: Spanish
LS - LANGUAGE OF SUMMARY: English; French
AB - ABSTRACT: The Pleistocene of the Bogota plateau consists of six units which from youngest to oldest are a complex of black soils, brown silts, red silts, a lower terrace, a high terrace, and cones. The high terrace and red silts are separated by an erosional unconformity of some magnitude. The red silts indicate an oxidizing phase, which also stained the Cretaceous sandstones, and reached its maximum development near Mosquera. Mammalian remains are widespread between the red and brown silt horizons. The fauna identified includes: Haplomastodon waringi, Equus (Amerhippus) lasallei, Equus sp., and Mylodon sp. Besides this fauna Smilodon neogaeus, Megalonix, and Auchenia have also been cited, but their presence has not been proved since the collected material has been misplaced.
DE - DESCRIPTORS: Cenozoic-; Chordata-; Colombia-; Mammalia-; paleontology-; Pleistocene-; Quaternary-; Sabana-de-Bogota; South-America; stratigraphic-position; Tetrapoda-; Vertebrata-
CC - CATEGORY CODES: 11-Vertebrate-paleontology
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
IL - ILLUSTRATION: illus. incl. sketch map.
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0120-0283
CO - CODEN: UISBAV
AN - ACCESSION NUMBER: 1967-002616
UD - UPDATE CODE: 1967
Registro 2909 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Contribucion al estudio palinologico del terciario de Colombia.
AU - AUTHORS: Sole-de-Porta-N
SO - SOURCE: Boletin de Geologia (Bucaramanga). 7; Pages 55-75. 1961.
PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1961.
CP - COUNTRY OF PUBLICATION: Colombia
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: Spanish
AB - ABSTRACT: A study of the Tertiary pollen and spores from a section between Montera and Planeta Rica is incomplete as only the most favorable strata were sampled. Geologically the region is part of a paralic basin with various coal seams and carbonaceous shales alternating with coarser clastics which are generally well sorted, and beds of reddish argillaceous sandstone. Beginning at the middle of the sequence is a series of gray, and less frequently green, claystones with a molluscan fauna. Among the forms identified are: Pteridophyta: Polypodiaceae, Schizeaceae, Lycopodiaceae(?), Cyatheaceae(?); Gymnosperma: Coniferae; Angiosperma: Bombacaceae, Grevilleoideae, Leguminosae, Malvaceae, Malpighiaceae, Myricaceae, Nympheaceae, Palmae, Sapotaceae, Symplocaceae, and Tyliaceae(?).
DE - DESCRIPTORS: Cenozoic-; Colombia-; flora-; microfossils-; Montera-Planeta-Rica-region; paleontology-; palynomorphs-; South-America; Tertiary-
CC - CATEGORY CODES: 09-Paleobotany
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
IL - ILLUSTRATION: illus.
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0120-0283
CO - CODEN: UISBAV
AN - ACCESSION NUMBER: 1967-002617
UD - UPDATE CODE: 1967
Registro 2910 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Algunos problemas estratigrafico-faunsticos de los vertebrados en Colombia (con una bibliografa comentada).
AU - AUTHORS: Porta-Jaime-de
SO - SOURCE: Boletin de Geologia (Bucaramanga). 7; Pages 83-104. 1961.
PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1961.
CP - COUNTRY OF PUBLICATION: Colombia
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: Spanish
AB - ABSTRACT: The oldest vertebrate fossils of Colombia are Cretaceous fish and reptiles. They are found in the central cordillera and range from Aptian to Maestrichtian in age. The only Eocene vertebrate fossiliferous deposit is in the Mugrosa formation. Stratigraphic delimitation is a problem because of the lack of material for paleontological correlation. The early and late Oligocene is represented by a variety of vertebrates, including mammals, from the upper Magdalena valley. The presence of rodents raises the problem of their movement to South America. One explanatory hypothesis is that an archipelago connected the Americas which permitted the southward migration of some rodents and primates. The paleontologically important Miocene deposits contain the La Venta fauna of Huila and the Carmen de Apicala of Tolima. In the La Venta, the most well known in South America, the most numerous orders are the mammalian Edentata, Rodentia, Notoungulata, and Primates. The Pliocene vertebrates are the least known of the Tertiary formations of Colombia. A knowledge of the fauna, especially in the north, would be most important in establishing the Pliocene-Pleistocene boundary. The chronology and paleontology of the Pleistocene has not yet been solved; an understanding of this epoch would clarify the events leading to the establishment of a tropical and neotropical fauna. The most abundant Pleistocene animal is a genus of Mastodon. Notably absent are armored forms; carnivores are also rare. An annotated bibliography organized by geologic age is incorporated into the text.
DE - DESCRIPTORS: bibliography-; biogeography-; Cenozoic-; Chordata-; Colombia-; Cretaceous-; Cretaceous-to-Pleistocene; Mesozoic-; paleontology-; range-; regional-; South-America; stratigraphic-; stratigraphic-value; stratigraphy-; Vertebrata-; vertebrate-faunas
CC - CATEGORY CODES: 12-Stratigraphy
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
IL - ILLUSTRATION: illus. incl. sketch map.
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0120-0283
CO - CODEN: UISBAV
AN - ACCESSION NUMBER: 1967-002618
UD - UPDATE CODE: 1967
Registro 2911 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: El papel de la gravedad y la erosion en las estructuras del borde oriental de la sabana de Bogota.
AU - AUTHORS: Julivert-M
SO - SOURCE: Boletin de Geologia (Bucaramanga). 8; Pages 5-20. 1961.
PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1961.
CP - COUNTRY OF PUBLICATION: Colombia
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: Spanish
LS - LANGUAGE OF SUMMARY: English; French
AB - ABSTRACT: The eastern border of the Bogota plateau is formed by the north-south trending Bogota-Usaquen anticline. The anticlinal flanks are composed of beds of the upper Guadalupe and the anticlinal core is composed of beds of the lower Guadalupe formation. The stratigraphy of the upper Guadalupe is discussed on the basis of a section measured near Usaquen; a change from compact sandstone at the base to friable sandstone at the top is noted. Shales are abundant in the lower half of the formation. Overturning of beds occurs over much of the western flank of the anticline and is of two types: total overturning of the entire flank, and overturning of only the structurally higher beds which have separated from the structurally normal lower beds. The latter reversals are gravitational phenomena of the collapse type and are due to dip slip along argillaceous zones within sandstones of the upper Guadalupe. Apparently erosion has exposed the less competent beds which consequently collapsed gravitationally. In the case of total overturning, the influence of gravity as a deforming agent cannot be established. Apparently during the last stages in the formation of the Bogota-Usaquen anticline, most of the crest had been eroded so that each of the flanks acted with a certain degree of independence from the other.
DE - DESCRIPTORS: anticlines-; Bogota-Usaquen-anticline; Colombia-; denudation-; erosion-; folds-; gravity-sliding; Guadalupe-; Paleozoic-; Permian-; Sabana-de-Bogota; South-America; structural-geology; tectonics-
CC - CATEGORY CODES: 16-Structural-geology
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
IL - ILLUSTRATION: illus.
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0120-0283
CO - CODEN: UISBAV
AN - ACCESSION NUMBER: 1967-002619
UD - UPDATE CODE: 1967
Registro 2912 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Geologa de los alrededores de Ortega, Tolima.
AU - AUTHORS: Buergl-Hans
SO - SOURCE: Boletin de Geologia (Bucaramanga). 8; Pages 21-38. 1961.
PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1961.
CP - COUNTRY OF PUBLICATION: Colombia
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: Spanish
LS - LANGUAGE OF SUMMARY: English; German
AB - ABSTRACT: An almost complete sequence from the Albian through the Miocene is exposed in the region covering some 600 square kilometers between the Cucuana and Ortega rivers (Colombia) and including the Ortega oil field. The lower Albian overlaps the continental Giron formation of Rhaetic-Liassic age. The sequence up to the lower Maestrichtian is marine, and the upper Maestrichtian and Tertiary were deposited under fluvial-lacustrine conditions. Two main structural elements are present: the Chicuambe anticline on the east with competent beds close to the surface; and the Flautillo syncline on the west with 4000 meters of incompetent Cretaceous and Tertiary sediments. Most of the folds and faults are located on the flank between these two elements; their variations are attributed to a difference in rock competency. The Chicuambe anticline was manifest during the Cretaceous, causing considerable variation in thickness and facies of the associated rocks. Folds and faults are the result of compressive movements which began in the Senonian, and reached their maximum at the beginning of the middle Eocene, Aquitanian, and Pliocene. Oil fields occur in limestones and sandstones of Albian age. The argillaceous beds of Cenomanian and Turonian age, and possibly Coniacian beds, are considered as source rocks.
DE - DESCRIPTORS: Cenozoic-; Colombia-; Cretaceous-; folds-and-faults; Mesozoic-; occurrences-; Ortega-; petroleum-; South-America; stratigraphy-; tectonics-; Tertiary-
CC - CATEGORY CODES: 29-Economic-geology-of-energy-sources
DT - DOCUMENT TYPE: Serial; Map
BL - BIB LEVEL: Analytic
MS - MAP SCALE: 1:33,000
IL - ILLUSTRATION: illus. incl. geol. map .
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0120-0283
CO - CODEN: UISBAV
AN - ACCESSION NUMBER: 1967-002620
UD - UPDATE CODE: 1967
Registro 2913 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Geologa de la vertiente W de la Cordillera Oriental en el sector de Bucaramanga.
AU - AUTHORS: Julivert-M
SO - SOURCE: Boletin de Geologia (Bucaramanga). 8; Pages 39-42. 1961.
PB - PUBLISHER: Universidad Industrial de Santander. Bucaramanga, Colombia. 1961.
CP - COUNTRY OF PUBLICATION: Colombia
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: Spanish
LS - LANGUAGE OF SUMMARY: English; French
AB - ABSTRACT: Near Bucaramanga (Colombia), in the zone between the Santander massif on the east and the central cordillera on the west, is a general structural downwarp loosely termed the Magdalena valley. During the development of the downwarp, a series of basement faults formed. In the Magdalena valley the faults have their western walls downthrown, and in the Santander massif their eastern walls are downthrown. Those faults located in the central area have the greater throw and have undergone the more recent movement. These faults are responsible for the formation of the three structural units which from west to east characterize this region: the Magdalena valley, the Mesa zone, and the Santander massif.
DE - DESCRIPTORS: Bucaramanga-region; Colombia-; faults-; South-America; structural-geology; tectonics-
CC - CATEGORY CODES: 16-Structural-geology
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
IL - ILLUSTRATION: illus.
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0120-0283
CO - CODEN: UISBAV
AN - ACCESSION NUMBER: 1967-002621
UD - UPDATE CODE: 1967
Registro 2914 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Late Cretaceous and Tertiary stratigraphy and tectogenesis of the Colombian Andes.
AU - AUTHORS: Hammen-T-van-der
SO - SOURCE: Geologie en Mijnbouw. 40; 5, Pages 181-188. 1961.
PB - PUBLISHER: De Bussy Ellerman Harms. Amsterdam, Netherlands. 1961.
CP - COUNTRY OF PUBLICATION: Netherlands
PY - PUBLICATION YEAR: 1961
LA - LANGUAGE: English
AB - ABSTRACT: Ten sandstone and conglomerate formations are consistently recognizable units in the upper Cretaceous and Tertiary sections of the Colombian Andes. They are related to tectonic phases and the marine Cretaceous is succeeded by continental Tertiary beds in which the lower and middle Eocene are considered pre-Andean, the upper Oligocene is proto-Andean, and the Miocene and Pliocene are eu-Andean. The ages of the formations do not correspond exactly with the palynologic time limits which are controlled by climatic changes.
DE - DESCRIPTORS: Andes-; Cenozoic-; Colombia-; Cretaceous-; Mesozoic-; South-America; stratigraphy-; tectonics-; Tertiary-
CC - CATEGORY CODES: 12-Stratigraphy; 16-Structural-geology
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
IL - ILLUSTRATION: illus.
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0016-7746
CO - CODEN: GEMIAA
AN - ACCESSION NUMBER: 1967-009485
UD - UPDATE CODE: 1967
Registro 2915 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Petroleum developments in South America and Caribbean area in 1959.
AU - AUTHORS: Clark-E-W
SO - SOURCE: Bulletin of the American Association of Petroleum Geologists. 44; 7, Pages 1014-1057. 1960.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1960.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1960
LA - LANGUAGE: English
AB - ABSTRACT: Exploration and production activities in 1959 were stimulated in Argentina and Brazil, in a politically inspired effort to achieve self-sufficiency in petroleum, but were depressed in Venezuela, which sells the bulk of its production in competition with other major producing areas of the world. In South America as a whole, crude oil production in 1959 was 3,244,900 b./d., only fractionally higher than in 1957. There were appreciable increases, as compared with 1957, in Argentina, Brazil, Colombia, and Trinidad, totalling 113,100 b./d.; this was offset by a decrease of 69,000 b./d. in Venezuelan production. Exploration activities were maintained at a high level in Brazil, Argentina, Bolivia, and Colombia but decreased considerably in Venezuela, where large concession areas were voluntarily surrendered.
DE - DESCRIPTORS: developments-; natural-gas; petroleum-; Petroleum-natural-gas; South-America
CC - CATEGORY CODES: 29-Economic-geology-of-energy-sources
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
IL - ILLUSTRATION: illus. incl. geol. sketch map.
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0883-9247
AN - ACCESSION NUMBER: 1960-000837
UD - UPDATE CODE: 1960
Registro 2916 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Ensete berryi; revised name for Musa enseteformis Berry.
AU - AUTHORS: Jain-R-K
SO - SOURCE: Nature (London). 187; 4734, Pages 342-343. 1960.
PB - PUBLISHER: Macmillan Journals. London, United Kingdom. 1960.
CP - COUNTRY OF PUBLICATION: United-Kingdom
PY - PUBLICATION YEAR: 1960
LA - LANGUAGE: English
AB - ABSTRACT: Carbonized seeds of banana plants from the Oligocene of Colombia, originally described as Musa enseteformis, are referred to the recently revived genus Ensete.
DE - DESCRIPTORS: Cenozoic-; Colombia-; Ensete-berryi; Musa-enseteformis-=-Ensete-berryi; Oligocene-; paleobotany-; Paleogene-; paleontology-; South-America; Tertiary-
CC - CATEGORY CODES: 09-Paleobotany
DT - DOCUMENT TYPE: Serial
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
IS - ISSN: 0028-0836
CO - CODEN: NATUAS
AN - ACCESSION NUMBER: 1960-002177
UD - UPDATE CODE: 1960
Registro 2917 de 5614 - GeoRef Disc 1: 1785-1974
TI - TITLE: Exploration in Llanos of Colombia.
AU - AUTHORS: Nero-Mark; Podesta-D-J
SO - SOURCE: Bulletin of the American Association of Petroleum Geologists. 44; 7, Pages 1254. 1960.
PB - PUBLISHER: American Association of Petroleum Geologists. Tulsa, OK, United States. 1960.
CP - COUNTRY OF PUBLICATION: United-States
PY - PUBLICATION YEAR: 1960
LA - LANGUAGE: English
DE - DESCRIPTORS: Colombia-; economic-geology; Llanos-region; petroleum-; petroleum-exploration; South-America
CC - CATEGORY CODES: 29-Economic-geology-of-energy-sources
DT - DOCUMENT TYPE: Abstract; Serial
BL - BIB LEVEL: Analytic
RF - REFERENCE SOURCE: GeoRef, Copyright 2000, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
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