ESTRATIGRAFA FSICA
ESTRATIGRAFA FSICACRETCICO EN COLOMBIALITHOSTRATIGRAPHYThe
technique known as "lithostratigraphy" involves the interpretation,
correlation, and mapping of sedimentary rocks on the basis of
similarities in lithology and/or lithofacies. The practice of
interpretation, correlation, and mapping based on
"lithostratigraphy" often ignores significant breaks in the
sedimentary section, including those caused by unconformities,
omission surfaces, ravinement surfaces, and flooding surfaces. This
can lead to significant mis-correlations, particularly if it is
assumed that the "lithostratigraphic" units accumulated over the
same interval of time.ALLOSTRATIGRAPHYThe technique known as
"allostratigraphy" involves stratigraphic interpretation,
correlation, and mapping which uses discontinuities and surfaces to
subdivide the sedimentary section. These discontinuities and
surfaces are assumed to have time-stratigraphic significance
(NACSN, 1983) and may include unconformities, omission surfaces,
ravinement surfaces, and flooding surfaces (Bhattacharya and
Walker, 1991a).
Se explora la idea propuesta con anterioridad por ETAYO
(1964:76) y ETAYO & RODRGUEZ (1985: XXVI-5)entre otros. En el
sentido de que los cambios litolgicos (lmites entre las unidades
litoestratigrficas) no necesariamente corresponden a lneas de
contemporaneidad
BIBLIOGRAFAhttp://www.sepmstrata.org/Terminology.aspx?id=ravinementHistoria
geolgica de Colombia, Hans Brgl, Academia Colombiana de Ciencias,
Instituto de Ciencias de la Universidad Nacional de
Colombia.Registro de las Biozonas de Foraminferos Planctnicos
Gansserina gasseri y Abathomphalus mayaroensis (Maastrchtiano Medio
y Superior) en el Extremo Meridional del Valle Medio del Magdalena
(Colombia, Sur Amrica), NADEJDA TCHEGLIAKOVA Departamento de
Geociencias, Universidad Nacional de Colombia, Apartado 14490,
Bogot, ColombiaA Proposal on the Classification of Systems Tracts:
Application to the Allostratigraphy and Sequence Stratigraphy of
the Cretaceous Colombian Basin. Part 2: Barremian to
Maastrichtian.CHRONOLOGY RELATIVE SEA LEVEL HISTORY AND A NEW
SEQUENCE STRATIGRAPHIC MODEL FOR BASINAL CRETACEOUS FACIES OF
COLOMBIA TOMAS VILLAMIL.
