ISSN: 2310-2799
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546,196 artículos
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Año:
2019
ISSN:
2007-2902, 1026-8774
Mitre-Salazar, Luis Miguel
Universidad Nacional Autónoma de México
Resumen
An interesting area for a structural geology study was detected with the sid of a LANDSAT image… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Mitre-Salazar, Luis Miguel
Universidad Nacional Autónoma de México
Resumen
The NW-SE trending San Tiburcio lineament extends from the wester part of the Sierra de Parras, State of Coahuila, to the vicinity of El Huizachal, State of San Luis Potosí… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Aranda-Gómez, José Jorge
Universidad Nacional Autónoma de México
Resumen
The Aguascalientes valley is a physiographic feature with an approximate N10ªE trend. The valley greatly resembles that of the Villa de Reyes and, therefore, it is assumed that it was formed by tectonic processes and it belongs to a widespread extensional system… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Roldán-Quintana, Jaime
Universidad Nacional Autónoma de México
Resumen
The Baviácora Quadrangle is located 100 km NE of Hermosillo. It is limited by the coordinates 29º30’-29º45’ N and 110ª20’ W and covers an area of about 900 km2. It is located in the Elongated Ranges subprovince of the Sierra Madre Occidental… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Almazán-Vázquez, Emilio
Universidad Nacional Autónoma de México
Resumen
ABSTRACT
The Alisitos Formation, exposed in the Baja California Peninsula, is a volcano-sedimentary insular arc sequence. The sections studied at Los Torotes, La Bocana, El Cuervito and San José, expose stratigraphic columns of 500 to 3,500 m of interstratified basalt, andesite, dacite, rhyolite, pyroclastic acid rocks, grauwacke, silt, and biogenic rocks.
The paleontology, petrography, and lithologic associations have permitted chronostratigraphic correlations between Los Torotes-La Bocana and El Cuervito-San José areas of different sedimentologic characteristics. The first with a column of 5,000 m thickness is interpreted to be a deposit of insular arc margin. The second shows a clear contrast since its thickness is of 1,500 m and represents the sedimentation in an insular fore-arc basin... In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Vega-Vera, Francisco Javier; Perrilliat, María del Carmen
Universidad Nacional Autónoma de México
Resumen
A new species of the genus Costacoplumais erected for a fosil decapod from the Potrerillos Formation of Maastrichtian age of Nuevo León State, Mexico… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Morón-Ríos, Alejandro; del Carmen Perrilliat, María
Universidad Nacional Autónoma de México
Resumen
A new species o f the Genus Griffithides Portlock, 1843, of the Family Proetidae, of the Ixtaltepec Formation (Pennsylvanian), of the Nochixtlán area in Oaxaca in south-central Mexico is described. Its taxonomic situation is discussed and compared with two of the known species of the genus. The geographic distribution of this genus in North America is extended.
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Año:
2019
ISSN:
2007-2902, 1026-8774
de Pablo-Galán, Liberto; Altuzar-Coello, Patricia
Universidad Nacional Autónoma de México
Resumen
The chemical analysis of the major rock components Si, Al, Fe, Ca, Mg, K and Ti can be determined with a precision superior to that of one standard deviation of the real concentration by x-ray fluorescence on pulverized and pressed material… In order to continue, download the full paper in PDF.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Enciso-De la Vega, Salvador
Universidad Nacional Autónoma de México
Resumen
To the south of Mexico City, in the Mixteca region of Puebla, near the northwestern border of Oaxaca State and east of the town of Progreso, there are metamorphic rocks belonging to the Acatlán Complex associated with narrow structural windows. One of these is located on the west flank of Cerro El Cuxtepeque . Micropaleontologic studies allowed to ldentify the fusulinids Schwagerina cf. gruperaensis and Parafusulinidae cf. P. durhami both of Leonardian age. The stratigraphic section contains gypsum and oolitic structures in limestone and chert, which suggest the existence of an environment of high energy and evaporation in permian littoral zone. It is probable that similar rocks and structures in this part of Mexico follow the general pattern described in this paper.
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Año:
2019
ISSN:
2007-2902, 1026-8774
Carranza-Castañeda, Oscar
Universidad Nacional Autónoma de México
Resumen
The fossil material of rhinoceroses collected in the basal layer of the arroyo La Carreta, from the Rancho El Ocote local fauna, is described in this paper… In order to continue, download the full paper in PDF.
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