No. Registros Solicitud 1 5614 colombia

TI - TITLE: Evolucion ambiental de la depresion Momposina (Colombia) desde el Pleistoceno Tario a los Paisajes actuales

Translated Title: Environmental evolution of the Momposina Depression (Colombia), from the late Pleistocene to present time.

AU - AUTHORS: Herrera-Luisa-Fernanda; Sarmiento-Gustavo; Romero-Fredy; Botero-Pedro-Jose; Berrio-Juan-Carlos

AF - AUTHOR AFFILIATION: Fundacion Erigaie, Bogota, Colombia

SO - SOURCE: Geologia Colombiana. 26; Pages 95-121. 2001.

PB - PUBLISHER: Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias. Bogota, Colombia. 2001.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 2001

LA - LANGUAGE: Spanish

LS - LANGUAGE OF SUMMARY: English

AB - ABSTRACT: The Momposina Basin, located in the lower Magdalena valley, in northern Colombia, is an example of an anastomosed system since the Pleistocene, which was developed as an answer to the progressive sinking of a transtensive basin. The anastomosed system is controlled by microtectonic blocks, which are limited by faults indicating a differential subsidence with a mayor sinking of the southern and western blocks. Water sources move towards the southwestern part of the region, as a product of the differential subsidence. The stratigraphic sequence of Boquillas core showed a fluvial succession with three main episodes. Braided channels and lower flooded plains characterize the first episode during the Last Glacial Maximum, 21000 years ago. The second episode is represented by a transformation in the sediments with reddish tropical soils. At this time, there is a period of no sedimentation, within a dry environment, coinciding with the Younger Dryas period, at the limit of the Pleistocene-Holocene. The third episode begins at 10000 years BP and reflects the Holocene sedimentation with minor variations in the river dynamics, similar to present sedimentation at the Momposina Basin. Different climatic variations were analyzed, as well as ancient and present river dynamics of the Magdalena River, the evolution of soils and vegetation since the beginning of the Holocene. The presence of prehispanic groups was also registered together with the human intervention on the landscape and soils with the construction of ridge fields and canals to transform large areas and control flooding and to adequate them for agricultural practices.

DE - DESCRIPTORS: biogenic-structures; bioturbation-; Bolivar-Colombia; Boquillas-Colombia; braided-streams; Cenozoic-; clastic-sediments; clay-; Colombia-; depressions-; fluvial-sedimentation; granulometry-; Holocene-; Magdalena-Colombia; Magdalena-River; Mompos-Colombia; paleoclimatology-; paleogeography-; Pleistocene-; Quaternary-; sand-; sedimentary-structures; sedimentation-; sediments-; soils-; South-America; streams-; upper-Pleistocene

CC - CATEGORY CODES: 24-Quaternary-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N083000; N093000; LONG: W0734500; W0750000.

IL - ILLUSTRATION: Refs: 72; illus. incl. block diag., strat. cols., 2 tables, geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute.

IS - ISSN: 0072-0992

CO - CODEN: GECBA7

AN - ACCESSION NUMBER: 2003-027106

UD - UPDATE CODE: 200309

Registro 418 de 5614 - GeoRef : 2002-2004/12

TI - TITLE: El Lago Pleistoceno de Soata (Boyaca, Colombia); consideraciones estratigraficas, paleontologicas y paleoecologicas

Translated Title: The Pleistocene lake in Soata (Boyaca, Colombia); stratigraphy, paleontology and paleoecology.

AU - AUTHORS: Villarroel-A-Carlos; Concha-Ana-Elena; Macia-S-Carlos

AF - AUTHOR AFFILIATION: Universidad Nacional de Colombia, Departamento de Geociencias, Bogota, Colombia

SO - SOURCE: Geologia Colombiana. 26; Pages 79-93. 2001.

PB - PUBLISHER: Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias. Bogota, Colombia. 2001.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 2001

LA - LANGUAGE: Spanish

LS - LANGUAGE OF SUMMARY: English

AB - ABSTRACT: The detailed study of the sedimentites cropping out at the upper heads of the Portugalete and Ovachia creeks, SSE and NNE of Soata respectively, allow to establish the presence of a lake (Lake of Soata), which was a result of the damming of the ancestor of the Chicamocha river downstream of the School of Jutua. Two age dating based on C14 (45.900+ or -1.600 and 39.600+ or -800 years BP) have been able to determine that the lake was formed in the Middle Pleni-Glacial Age, probably during the interstadial of Chicagota of the Middle Fuquean. The sediments studied as a new lithostratigraphic unit--Soata Formation--suggest that the environmental conditions were hot and dry with serious variations in the rainy regime. Additionally, the knowledge of the fossil mammals (Haplomastodon waringi, Odocoileus cf. salinae and Neochoerus sp.), collected in the Soata Formation, is more accurate and considerably increased as well as the identification of some gastropods.

DE - DESCRIPTORS: absolute-age; argillite-; Artiodactyla-; biostratigraphy-; Boyaca-Colombia; Bulimulus-; C-14; carbon-; carbonate-rocks; Cenozoic-; Cervidae-; Chicamocha-River; Chordata-; clastic-rocks; Colombia-; dates-; Drymaeus-; Eutheria-; Gastropoda-; Haplomastodon-waringi; Helicina-concentrica; Invertebrata-; isotopes-; Jutua-Colombia; lacustrine-environment; limestone-; lithostratigraphy-; Mammalia-; Mastodontidae-; Mastodontoidea-; Mollusca-; Neochoerus-; Neocyclotus-cingulatus; Odocoileus-salinae; paleoecology-; paleogeography-; Pleistocene-; Portugalete-Colombia; Proboscidea-; Quaternary-; radioactive-isotopes; Rodentia-; Ruminantia-; sandstone-; sedimentary-rocks; sediments-; siltstone-; Soata-Colombia; Soata-Formation; South-America; taxonomy-; terraces-; Tetrapoda-; Theria-; Vertebrata-

CC - CATEGORY CODES: 24-Quaternary-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N062000; N062500; LONG: W0724000; W0724100.

IL - ILLUSTRATION: Refs: 18; illus. incl. sect., 1 plate, geol. sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute.

IS - ISSN: 0072-0992

CO - CODEN: GECBA7

AN - ACCESSION NUMBER: 2003-027105

UD - UPDATE CODE: 200309

Registro 419 de 5614 - GeoRef : 2002-2004/12

TI - TITLE: Revaluacion del modelo geologico del Campo Tello (Valle Superior del Magdalena) y sus implicaciones en el programa de desarrollo

Translated Title: Reinterpretation of the Tello Field geologic model (Upper Magdalena Valley) and implications for its development strategy.

AU - AUTHORS: Ramon-Juan-Carlos; Vidal-Gloria; Rosero-Alexis; Gomez-Pilar; Borja-Hubert

AF - AUTHOR AFFILIATION: Hocol S.A., Bogota, Colombia

SO - SOURCE: Geologia Colombiana. 26; Pages 59-77. 2001.

PB - PUBLISHER: Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias. Bogota, Colombia. 2001.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 2001

LA - LANGUAGE: Spanish

LS - LANGUAGE OF SUMMARY: English

AB - ABSTRACT: The Tello field reservoir section was interpreted from 3-D seismic and biostratigraphic analysis from cuttings as an Early Miocene blanket-like fluvial sandstone overlying an Oligocene unconformity. Reservoir stratigraphy was "layer cake". Absence of sandstone in wells was interpreted as a lateral facies change to mudstone. Unexpected results from a recent infill drilling and water injection led to a review of the geological model. Data from over 800 feet of outcrop, 928 feet of cores from five wells, 21 new biostratigraphic analysis from cores, dipmeter and wireline logs from 35 wells, 5 check-shot and a 36 km (super 2) seismic cube were interpreted and integrated to define a new reservoir model. Sedimentological studies indicate that the reservoir section was deposited in a well oxygenated, current-swept, shallow-marine shelf as aggradational tidally influenced cycles, as progradational shorefaces and as tidal bars and channels. High-resolution sequence stratigraphic subdivision of the reservoir allows identification of repeated sections in several wells. Dipmeter data shows low to very high dip angles within the oil-bearing reservoir and confirms the location of low-angle thrust faults, interpreted from well log correlations. The Tello field consists of 5 thrust sheets arranged as a series of partly overlapping ramp anticlines with high-angle dipping backlimbs and low-angle forelimbs. Structural horses involve mostly Monserrate strata. Siliceous siltstones in the Lower Monserrate and Upper Villeta formations act as detachment surfaces for these thrusts. The three easternmost sheets form an antiformal stack that shares the same trailing branch point. Although the roof sequence has been eroded by the Miocene unconformity, the small vertical offset (forelimb against the footwall flat) at the lowest fault-bend indicates that the "Roof sequence" was nearby. By the contrary, the western thrust faults cut the roof sequence as the break-back sequence of deformation occurred. These events are the result of cumulative episodes of deformation and thrust reactivation. Folding of the unconformity and the Miocene strata and the better preservation of the Monserrate strata in the structurally high positions of the field supports reactivation of the westernmost faults. Integration of multiple data sets lead to a reinterpretation of the stratigraphic and structural models that results in better reservoir modeling and planning and recognition of undrilled potential of the Tello field. Estimated new additional oil reserves are about 18 MMBbls. The last 7 wells honored the new reservoir model and daily oil production has increased 80%.

DE - DESCRIPTORS: Barzalosa-Formation; Cenozoic-; clastic-rocks; Colombia-; correlation-; Cretaceous-; electrical-logging; faults-; fluvial-environment; folds-; geophysical-methods; geophysical-surveys; lithofacies-; lithostratigraphy-; Magdalena-Valley; Mesozoic-; models-; Monserrate-Formation; mudstone-; Neiva-Basin; oil-and-gas-fields; oil-wells; paleoenvironment-; petroleum-; petroleum-exploration; reservoir-rocks; reservoirs-; reverse-faults; sandstone-; sedimentary-rocks; seismic-methods; South-America; structural-controls; surveys-; Tello-Field; Tertiary-; thrust-faults; Villeta-Formation; well-logging

CC - CATEGORY CODES: 29A-Economic-geology,-geology-of-energy-sources; 20-Applied-geophysics

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N030000; N031500; LONG: W0750000; W0751500.

IL - ILLUSTRATION: Refs: 24; illus. incl. strat. col., geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute.

IS - ISSN: 0072-0992

CO - CODEN: GECBA7

AN - ACCESSION NUMBER: 2003-027104

UD - UPDATE CODE: 200309

Registro 420 de 5614 - GeoRef : 2002-2004/12

TI - TITLE: A formacao Sanga do Cabral na Regiao de Sao Leopoldo, Rio Grande do Sul, Brasil

Translated Title: The Sanga do Cabral Formation in Sao Leopoldo, Rio Grande do Sul, Brazil.

AU - AUTHORS: Nowatzki-Carlos-Henrique; Klein-Carla

AF - AUTHOR AFFILIATION: Universidade do Vale do Rio dos Sinos, Nucleo de Estudos Sedimentologicos e Estratigraficos, Sao Leopoldo, Brazil

SO - SOURCE: Geologia Colombiana. 26; Pages 45-57. 2001.

PB - PUBLISHER: Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias. Bogota, Colombia. 2001.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 2001

LA - LANGUAGE: Portuguese

LS - LANGUAGE OF SUMMARY: English; Spanish

AB - ABSTRACT: The Permo-Triassic Sanga do Cabral Formation, Parana Basin, is represented in the region of Sao Leopoldo, Rio Grande do Sul State, Brazil, by deposits that represent alluvian fans in the base, braided rivers in the middle part, and dunes and interdunes in the upper part. This unit is limited by disconformities, the lower one with the Rio do Rasto Formation and the upper one with the Aeolian sandstones of the informal unit "Pedreira Sandstones". These limits probably mark two phases of tectonic movements that hit the area, expose its rocks to a more deep erosion. In the first phase, it affected the sediments from the Rio do Rasto Formation, whose debris make up the basal deposits of the Sanga do Cabral Formation. In the second phase, the most pronounced one, the basement was exposed, generating the sands that make up the aeolian sedimentation of the "Pedreira Sandstones".

DE - DESCRIPTORS: alluvial-fans; Arenitos-Pedreira-Unit; bedding-plane-irregularities; biogenic-structures; Brazil-; clastic-rocks; cross-bedding; erosion-; fluvial-environment; lithofacies-; lithostratigraphy-; Lower-Triassic; Mesozoic-; paleocurrents-; paleoenvironment-; Paleozoic-; Parana-Basin; Permian-; planar-bedding-structures; Rio-do-Rasto-Formation; Rio-Grande-do-Sul-Brazil; ripple-marks; sandstone-; Sanga-do-Cabral-Formation; Santa-Maria-Formation; Sao-Leopoldo-Brazil; Scythian-; sedimentary-rocks; sedimentary-structures; South-America; Triassic-; uplifts-

CC - CATEGORY CODES: 12-Stratigraphy; 06A-Sedimentary-petrology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: S300000; S293000; LONG: W0510000; W0513000.

IL - ILLUSTRATION: Refs: 55; illus. incl. geol. sketch map.

RF - REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute.

IS - ISSN: 0072-0992

CO - CODEN: GECBA7

AN - ACCESSION NUMBER: 2003-027103

UD - UPDATE CODE: 200309

Registro 421 de 5614 - GeoRef : 2002-2004/12

TI - TITLE: Sedimentitas del Aptiano tardio al sur de Pijao, Quebrada La Maizena, flanco occidental de la Cordillera Central, Departamento del Quindio, Colombia

Translated Title: Upper Aptian sedimentary rocks at La Maizena Gorge south of Pijao, on the western margin of the Central Cordillera, Quindio, Colombia.

AU - AUTHORS: Arevalo-Oscar-J; Mojica-Jairo; Patarroyo-Pedro

AF - AUTHOR AFFILIATION: Universidad Nacional de Colombia, Departamento de Geociencias, Bogota, Colombia

SO - SOURCE: Geologia Colombiana. 26; Pages 29-43. 2001.

PB - PUBLISHER: Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias. Bogota, Colombia. 2001.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 2001

LA - LANGUAGE: Spanish

LS - LANGUAGE OF SUMMARY: English

AB - ABSTRACT: This work describes the characteristics and geological setting of a fossil-bearing, approximately 45 m thick, pelitic-arenaceous sequence cropping out in the western flank of the Colombian Central Cordillera. The outcrops are located in the middle portion of the La Maizena creek, 8 km in SSW direction of the small Pijao town, located in the southern area of the Quindio Department. The sedimentary sequence occurs in a trending NEE-SSW belt, located east of the "Silvia-Pijao Fault", where the sediments appear in contact with micaceous and amphibolic schists, amphibolites, garnetiferous amphibolites and serpentinized ultramafic rocks, typical of the Arquia Complex, which has been considered by some authors as Paleozoic, by other as Cretaceous in age. Although the pelites dominate along the studied section, there are also boudin-like bodies of quartz-arenites and intercalations of lithic-conglomeratic sandstones as well as thin mafic tuffs. The scarce polarity indicators (normal graded conglomeratic sandstones) indicate that these sedimentary rocks lie in normal position and represent the lower part of a greater succession that passes upward to diabasic flows with sporadic tuffaceous and sedimentary intercalations. This sedimentary sequence seems to have been deposited in an open sea environment, with turbiditic episodes and near to mafic subaquatic volcanic sources. The presence of stable minerals in the sandstones and the occurrence of felsitic and quartzose phyllitic clasts in the lithic portions suggest that these rocks may derive from an eastern pericratonic province. The fossil content is composed by well preserved ammonites, small bivalves and exclusively planktonic forams. The ammonites (Acanthohoplites aff. odiosus Etayo-Serna, Phyllopachyceras cf. baborense (Coquand) and Phyllopachyceras sp.) were collected in the western portion of the exposed section, and evidence a Late Aptian age. The forams (not described here) were found in a higher level and were dated as Late Aptian-Early Albian age Several thin sections show that the sediments and the diabases have suffered cataclastic deformation, but there are no signs of regional metamorphism. This fact supports previous interpretations considering the Arquia Complex (that includes glaucophane-schists and amphibolitized eclogites) as a Precretaceous (Paleozoic) one.

DE - DESCRIPTORS: Acanthohoplites-odiosus; Albian-; Ammonites-; Ammonoidea-; Aptian-; basement-; biostratigraphy-; Bivalvia-; Central-Cordillera; Cephalopoda-; Colombia-; Cretaceous-; Foraminifera-; Invertebrata-; La-Maizena-Creek; lithostratigraphy-; Lower-Cretaceous; Mesozoic-; microfossils-; mineral-composition; Mollusca-; paleoecology-; paleogeography-; pelitic-texture; Phyllopachyceras-baborense; Pijao-Colombia; Protista-; Quindio-Colombia; sedimentary-rocks; South-America; taxonomy-; Tetrabranchiata-; textures-; turbidite-; upper-Aptian

CC - CATEGORY CODES: 06A-Sedimentary-petrology; 12-Stratigraphy

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

MC - MAP COORDINATES: LAT: N042000; N042200; LONG: W0754000; W0754400.

IL - ILLUSTRATION: Refs: 22; illus. incl. strat. col., 2 plates, 1 table, geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute.

IS - ISSN: 0072-0992

CO - CODEN: GECBA7

AN - ACCESSION NUMBER: 2003-027102

UD - UPDATE CODE: 200309

Registro 422 de 5614 - GeoRef : 2002-2004/12

TI - TITLE: Lineamientos de direccion NO-SE y NNE-SSO a NE-SO en el Centro Occidente Colombiano y en el Ecuador

Translated Title: Northwest- and northeast-trending lineaments of western Colombia and western Ecuador.

AU - AUTHORS: Ujueta-Guillermo

AF - AUTHOR AFFILIATION: Universidad Nacional de Colombia, Departamento de Geociencias, Bogota, Colombia

SO - SOURCE: Geologia Colombiana. 26; Pages 5-27. 2001.

PB - PUBLISHER: Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias. Bogota, Colombia. 2001.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 2001

LA - LANGUAGE: Spanish

LS - LANGUAGE OF SUMMARY: English

AB - ABSTRACT: Lineaments, by definition, are deep faults which penetrate the Upper Mantle and are recognized by a variety of geomorphological, structural, sedimentary, magmatic, geophysical and even paleontological clues. Rectilinearility and continuity over considerable distances (more than 1.000 kilometers) are the most important observed characteristics of Lineaments, which based on the opinion of several authors, could be even larger and continue to be extended as oceanic fractures. The lineaments are zones of weakness, up to 20 kilometers width, generally vertical or close to vertical, which have been affected by recurrent movements. Another interesting characteristics of all the lineaments recognized in the area of study, besides known vertical movements, are the transcurrent nature and the left-lateral sense of the displacements. The NW-SE Lineaments and the big NNE-SSW to NE-SW fractures (= Lineaments) occur as approximately orthogonal characteristics that constitute nearly a rhomboidal shape block's mosaic. It is remarkably interesting how the lineaments such as La Fragua, Ataco-Natagaima, Rio Ariari and Canas Gordas-Bogota, which are almost perpendicular to the general trend of the Cordillera Oriental, influence the facies and thickness of the sedimentary sequences in the Magdalena Valley. It is proposed that the structural zone belts defined by NW-SE lineaments, in central Colombia and also in some other areas to the east of Rio Ariari Lineament, were some of the features of the late Jurassic and lower Cretaceous transgressive seas which allowed the sedimentation of formations such as Brechas de Buenavista and Rio Bata. As a result of the highest compressional forces in the zone between the Guairapungo and Rio Mira Lineaments the Cordillera Oriental lost its identity and its width is reduced to a minimum. In this area the compressional forces are higher than the north and the south and explain the thinning in this area of the Cordillera Oriental.

DE - DESCRIPTORS: Andes-; Brechas-de-Buenavista-Formation; Colombia-; compression-tectonics; Cretaceous-; Ecuador-; fault-zones; faults-; Jurassic-; lineaments-; Lower-Cretaceous; Mesozoic-; Rio-Bata-Formation; South-America; structural-controls; tectonics-; Upper-Jurassic; western-Colombia; Western-Cordillera; western-Ecuador

CC - CATEGORY CODES: 16-Structural-geology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 83; illus. incl. 1 plate, geol. sketch maps.

RF - REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute.

IS - ISSN: 0072-0992

CO - CODEN: GECBA7

AN - ACCESSION NUMBER: 2003-027101

UD - UPDATE CODE: 200309

Registro 423 de 5614 - GeoRef : 2002-2004/12

TI - TITLE: Padre geologo Carlos Eduardo Acosta Arteaga (1919-2001)

Translated Title: Priest-geologist Carlos Eduardo Acosta Arteaga; 1919-2001.

AU - AUTHORS: Brieva-Jorge-A; Cepeda-Hector; Macia-Carlos-A

SO - SOURCE: Geologia Colombiana. 26; Pages 3-4. 2001.

PB - PUBLISHER: Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias. Bogota, Colombia. 2001.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 2001

LA - LANGUAGE: Spanish

DE - DESCRIPTORS: Arteaga,-Carlos-Eduardo; biography-; Colombia-; education-; paleontology-; South-America

CC - CATEGORY CODES: 08-General-paleontology

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: illus. incl. portr.

RF - REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute.

IS - ISSN: 0072-0992

CO - CODEN: GECBA7

AN - ACCESSION NUMBER: 2003-027100

UD - UPDATE CODE: 200309

Registro 424 de 5614 - GeoRef : 2002-2004/12

TI - TITLE: Ulexita; posible fuente de borax para el Pais

Translated Title: Ulexite; a possible source of borax for Colombia.

AU - AUTHORS: Rubiano-Manuel

AF - AUTHOR AFFILIATION: Universidad Nacional de Colombia, Departamento de Geociencias, Bogota, Colombia

SO - SOURCE: Geologia Colombiana. 18; Pages 203. 1993.

PB - PUBLISHER: Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Geociencias. Bogota, Colombia. 1993.

CP - COUNTRY OF PUBLICATION: Colombia

PY - PUBLICATION YEAR: 1993

LA - LANGUAGE: Spanish

DE - DESCRIPTORS: borate-deposits; borates-; borax-; Caqueta-Colombia; Colombia-; Puerto-Rico-Colombia; South-America; ulexite-

CC - CATEGORY CODES: 28A-Economic-geology,-geology-of-nonmetal-deposits; 01C-Mineralogy-of-non-silicates

DT - DOCUMENT TYPE: Serial

BL - BIB LEVEL: Analytic

IL - ILLUSTRATION: Refs: 1; illus.

RF - REFERENCE SOURCE: GeoRef, Copyright 2003, American Geological Institute.

IS - ISSN: 0072-0992

CO - CODEN: GECBA7

AN - ACCESSION NUMBER: 2003-027099

UD - UPDATE CODE: 200309