File:Estratos de Metapán.png

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Captions

Captions

The oldest stratigraphic units in El Salvador dating from the Jurassic period to the Early Miocene.

Summary

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Description
Español: Los estratos de Metapán corresponden a las rocas más antiguas de El Salvador; dicho nombre agrupa a las unidades estratigráficas que se depositaron desde el Jurásico hasta inicios del período Neógeno, y como su nombre indica se encuentran principalmente en el distrito de Metapán. Dichas unidades estratigráficas son:
  • El complejo Espinal, del período Jurásico y conformado por rocas volcánicas y metamórficas.
  • La formación Todos Santos, del Cretácico inferior y constituido por capas rojas de origen sedimentario y rocas volcánicas.
  • El Grupo Yojoa, que se divide en las formaciones Catarranas y Atima; data de las edades del Aptiense al Albiense del Cretácico, y está conformado por margas y calizas.
  • El Grupo Valle de los Ángeles, que se divide en Capas rojas inferiores (con rocas sedimentarias y volcánicas, de las edades Albiense al Cenomaniense del Cretácico, y que en el mapa aparece con el mismo color de la formación Todos Santos), la formación Jaitique (conformado por margas y calizas, de las edades Cenomaniense al Turoniense, y que en el mapa sus afloramientos aparecen con el mismo color que el Grupo Yojoa), y las capas rojas superiores (de rocas sedimentarias, datada del Cretácico superior al Mioceno inferior).
English: The Metapán strata correspond to the oldest rocks in El Salvador; this name groups together the stratigraphic units that were deposited from the Jurassic to the beginning of the Neogene period, and as its name indicates, they are mainly found in the Metapán district. These stratigraphic units are:
  • The Espinal complex, from the Jurassic period and made up of volcanic and metamorphic rocks.
  • The Todos Santos formation, from the lower Cretaceous and made up of red layers of sedimentary origin and volcanic rocks.
  • The Yojoa Group, which is divided into the Catarranas and Atima formations; it dates from the Aptian to the Albian ages of the Cretaceous, and is made up of marls and limestones.
  • The Valle de los Ángeles Group, which is divided into lower red layers (with sedimentary and volcanic rocks, from the Albian to Cenomanian ages of the Cretaceous, and which on the map appears with the same color as the Todos Santos formation), the Jaitique formation (made up of marls and limestones, from the Cenomanian to Turonian ages, and whose outcrops on the map appear with the same color as the Yojoa Group), and the upper red layers (of sedimentary rocks, dating from the Upper Cretaceous to the Lower Miocene).
Date
Source Own work, basado en la imagen de Wiesemann, G. (1978) «Mapa geológico de la República de El Salvador» y Plan Nacional de Ordenamiento Territorial (2002) «Mapa geológico de la República de El Salvador»; y en datos de Hradecký, Petr (2005) «Estudio geológico de los peligros naturales área de Metapán»
Author Juan Miguel

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current21:25, 10 August 2024Thumbnail for version as of 21:25, 10 August 20241,356 × 739 (191 KB)Juan Miguel (talk | contribs)Uploaded own work with UploadWizard

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