ISSN: 2310-2799
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546,196 artículos
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Año:
2019
ISSN:
2007-2902, 1026-8774
Pouyet, Simone; Herrera-Anduaga, Yolanda
Universidad Nacional Autónoma de México
Resumen
Two groups of problematic species of bryozoans (Cheilostomata) from the Gulf of Mexico were analized. The first group contains species of the Genus stylopomaLevinsen, 1909… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Nelson, Stephen A.
Universidad Nacional Autónoma de México
Resumen
Volcán Ceboruco is located in the western portion in the western portion of the Trans-Mexican Volcanic Belt. The eruptive history of this volcano is divided into three stages, separated by events which caused the formation of two calderas wich crown the top of the volcano… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Sánchez-Rubio, Gerardo
Universidad Nacional Autónoma de México
Resumen
A visit in May 1982 to the área of Chichonal Volcano allowed collection of data and pumice samples that were used afterwards in a routine examination of size sorting and petrographic studies… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Ortega-Gutiérrez, Fernando; Sánchez-Rubio, Gerardo
Universidad Nacional Autónoma de México
Resumen
The Discovery, and geologic, chemicla and petrographical studies of some gabbroic and anorthositic xenoliths in the basic lavas of Isla Socorro, and the cumulitic characterization of their textures… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Ferrari, Luca
Universidad Nacional Autónoma de México
Resumen
Estimados lectores, autores y árbitros de la Revista Mexicana de Ciencias Geológicas:
Quiero aprovechar este espacio para informales sobre el proceso de modernización que la Revista ha venido realizando durante este último año para estar al paso con el mundo de la edición científica internacional.
Este proceso ha involucrado diferentes actividades. La primera de ellas concierne a los tiempos de publicación. Se ha agilizado el proceso de edición y arbitraje reduciendo notablemente el tiempo que transcurre entre la sumisión de un manuscrito y su publicación. En la actualidad... DOWNLOAD THE FULL PAPER.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Aguirre-Díaz, Gerardo J.
Universidad Nacional Autónoma de México
Resumen
The Las Américas Formation was first defined by Fries and coworkers in 1965, and consists of four ignimbrites that they named, from the oldest to the youngest, Primero, Segundo, Tercero, and Cuarto flows. These pyroclastic deposits are in the vicinity of Tlalpujahua, State of Michoacán, to the south of the Acambay graben… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Malchus, Nikolaus
Universidad Nacional Autónoma de México
Resumen
Older phylogenetic studies of Late Jurassic to Early Cretaceous rudists tend to refer to the Recent bivalve family Chamidae as a model, especially if the “inversión” of the hinge detition and of fixation are concerned… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Buitrón-Sánchez, Blanca Estela; Pantoja-Alor, Jerjes
Universidad Nacional Autónoma de México
Resumen
In the Huetamo region, located at the limit of the states of Michoacán and Guerrero, numerous specimens of nerineids, pectinids, ostreids and rudists, with multiple perforations made by bioeroding organisms, were collected in beds of the El Cajón (Aptian) and Mal Paso (Albian) Formations.
The borings have circular and hexagonal outlines, with diameters ranging from 1.0 to 1.5 mm, and depths ranging from 0.45 to 0.9 mm, the holes form semicircular galleries. On the basis of these characteristics, the boring activity is attributed to clionid sponges of the ichnospecies Entobia sp. and E. cretacea Portlock, 1843... In order to continue, download full text in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Mainelli, Michele
Universidad Nacional Autónoma de México
Resumen
A new genus and a new species of rudist (Mathesia tertiicolloquiirudistarum) are described. The specimens were discovered in upper Aptian beds on the top a limestone sequence in Serra Sbregavitelli, in northeastern Matese of the southern Apennies, Italy… in order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Corona-Esquivel, Rodolfo; Alencáster, Gloria
Universidad Nacional Autónoma de México
Resumen
A geological study of the principal mining areas along the Pacific coast in the states of Colima and Michoacán was carried out whit the purpose of understanding the origin of the mineral deposits in southwestern Mexico… in order to continue, download the full paper in PDF.
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