ISSN: 2310-2799
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546,196 artículos
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Año:
2019
ISSN:
2007-2902, 1026-8774
Elías-Herrera, Mariano; Ortega-Gutiérrez, Fernando
Universidad Nacional Autónoma de México
Resumen
The Guerrero terrane in southern Mexico (Figure 1) is considered a major tectonostratigraphic accretion to the Mesozoic continental crust of Mexico, and essentially lacking an old continental basement (Campa and Coney, 1993; Centeno-García et al.,1993)… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Caballero-Miranda, Margarita E.
Universidad Nacional Autónoma de México
Resumen
Diatom analyses of lacustrine sediments are used as basis for paleolimnological reconstruction of Lake Chalco during the last glacial maximum (ca. 22,000 - 18,000 yr B.P.). Analyses were carried out in sediments from a section of a core correlating to this period… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Carrillo-Martínez, Miguel
Universidad Nacional Autónoma de México
Resumen
La presente nota es una lista de los principales efectos registrados en los estados de Colima y Jalisco, causados por el terremoto del 9 de octubre de 1995 a las 9:36 A. M., de magnitudes 6.5 Mb, 7.3 Ms y 7.5 Me, cuyo epicentro se localizóen las coordenadas 18.74°N y 104.67°W… Para continuar, descargue el artículo completo en PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Stanley Jr, George D.; González-León, Carlos M.
Universidad Nacional Autónoma de México
Resumen
New Late Triassic corals have been recovered from sponge, coral, and mollusk biostromes in the middle part of the Antimonio Formation, Sierra del Álamo, northwestern Sonora. Together with taxa already described from that formation, these corals contribute to our knowledge of Late Triassic faunas… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
McRoberts, Christopher A.
Universidad Nacional Autónoma de México
Resumen
The Norian-Rhaetian bivalve fauna from the upper part of Antimonio Formation is taxonomically and ecologically more diverse than previously reported. Of the 10 bivalve taxa described herein, eight have never been previously described from Sonora and at least four represent previously unknown forms… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Rodríguez-Castañeda, José Luis
Universidad Nacional Autónoma de México
Resumen
In central Sonora, in the Opodepe region, regional strike-slip foliation in Proterozoic rocks is the result of Middle to Late Jurassic shearing, whereas extensional structures in Paleogene plutons correspond to the evolution of mid-crustal extension during Middle Tertiary… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Aguirre-Díaz, Gerardo J.
Universidad Nacional Autónoma de México
Resumen
The Amealco caldera is one of five major caldera complexes within the Mexican Volcanic Belt. Stratigraphy indicates five major volcanic units related with the volcanic history of the Amealco caldera: (1) the Amealco Tuff, a widespread pyroclastic sequence that was erupted from the Amealco caldera at about 4.7 Ma and which represents 77 km3of magma… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Silva-Mora, Luis; Córdoba, Diego A.
Universidad Nacional Autónoma de México
Resumen
A short description is given of some stratigraphic sections exposed in the area called Huichapan-Tula-Ñadó volcanic field, whose most important geographic points are the towns of San Juan del Río, State of Querétaro; Huichapan and Tula de Allende, State of Hidalgo… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Damborenea, Susana E.; González-León, Carlos M.
Universidad Nacional Autónoma de México
Resumen
Four species of bivalves from the Antimonio Formation at Sierra del Álamo, Sonora, Mexico, are described. Two of them, Mysidioptera mexicana and Myophoriopis sonorensis are new species; the others are referred or compared to Late Triassic European or American species… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
de Pablo-Galán, Liberto; Lastra-Azpilicueta, María D.
Universidad Nacional Autónoma de México
Resumen
Pancreatic calculi from patients with chronic pancreatic disorders from the Mexico City area are 75% calcitic stones, with an average weight of 1.30 g and ranging in size from 7 to 28 mm, and 25% organic stones, with an average weight of 0.11 g and ranging in size from 4 to 12 mm… in order to continue, download the full paper in PDF.
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