Análisis de los depósitos de la formación Payandé en el área de Chaparral-Tolima (Colombia)
Autores
Perilla Vargas, Angela Milena
Director
Patarroyo Gama, Pedro Calixto
Tipo de contenido
Trabajo de grado - Maestría
Idioma del documento
EspañolFecha de publicación
2023
Título de la revista
ISSN de la revista
Título del volumen
Documentos PDF
Resumen
Abstract
The Payandé Formation is a lithostratigraphic unit of the upper Triassic of Colombia, its
outcrops are restricted to the Upper Magdalena Valley (VSM), where few studies have been
carried out due to various factors: the scarcity of outcrops, the magmatic affectations of
jurassic events, the subsequent tectonic deformations and the Colombian social conflict in
rural areas, as well as the difficult access to the areas where they emerge.
Studies of these outcrops offer more information about the deposits of the Payandé
Formation; the main study area includes the Tuluní section, which has a total thickness of
approximately 389 meters. In general, it is made up of compact to granular to very coarsegrained biomicrites, gray in color, some levels with intercalations of brownish chert nodules.
In this research, the description of the fossil record collected in the Tuluní section, in Amoyá
and along the Chaparral-Las Señoritas road is presented. Additionally, information on Otto
Renz's fossils from the Paleontological Collection of the National University of Colombia is
included.
These rocks represent a shallow marine deposits, developed in a supracontinental "rift" or
graben context. This extension of Triassic limestones possibly extends to Peru and Ecuador,
defining a marine corridor for that time interval, which can be correlated by lithostratigraphy
and fossil content.
With the revision in the present work, a new organization of the pre-Cretaceous Mesozoic
units is accepted and proposed, retaking the meaning of Renz related with the Payandé
Formation, another researchers indicate that this definition was not considered when was
proposed the distinction of the "Chicalá Member". In summary, the marine deposition of the Payandé Formation took place during the Norian
and Rhaetian, then volcanism began and the Triassic Sea withdrew, giving way to the Saldaña
Formation.
Palabras clave
Geología de Colombia ; Triásico superior ; Estratigrafía ; Sedimentología ; Paleontología ; Calizas ; Depósitos Calcáreos ; Nódulos Silíceos ; Mar somero ; Bioestratigrafía ; Fósiles ; Geology of Colombia ; Upper Triassic ; Stratigraphy ; Sedimentology ; Paleontology ; Limestone ; Calcareous Deposits ; Siliceous Nodules ; Shallow Sea ; Biostratigraphy ; Fossils
Descripción Física/Lógica/Digital
ilustraciones, diagramas, fotografías, mapas, tablas