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Sedimentología del Mioceno de la Ciudad Autónoma de Melilla

Authors: Gómez Gras, David Manuel; Parcerisa Duocastella, David;

Sedimentología del Mioceno de la Ciudad Autónoma de Melilla

Abstract

En este trabajo se describen la estratigrafía y las facies de los materiales miocenos del territorio de la Ciudad Autónoma de Melilla y se realiza una correlación con las diferentes unidades cronoestratigráficas descritas en la cuenca que permite asignar una edad más precisa a estos materiales. Se definen tres nuevas unidades estratigráficas. La unidad carbonática inferior consta de dos subunidades. La subunidad inferior arrecifal está formada casi exclusivamente por colonias de corales de tipo Porites ( boundstones ), con facies bien desarrolladas de núcleo y talud arrecifal. Estas facies arrecifales son muy similares a las descritas en los arrecifes coralinos típicos del Messiniense. Adaptándose a las bioconstrucciones arrecifales se dispone una subunidad carbonática bioclástica compuesta principalmente por calizas ( grainstones-packstones ) de moluscos y algas rojas. La estratificación de esta subunidad exhibe diferentes grupos de clinoformas que indican una progradación hacia el O de esta plataforma bioclástica. Por encima se dispone la unidad detrítica intermedia, que está constituida por areniscas y limos de color amarillo depositados en un ambiente deltaico progradante que rellena la paleotopografía dejada por la unidad subyacente. La unidad carbonática superior se dispone sobre las dos anteriores y está constituida por capas de calizas oolíticas ( packstones/ grainstones ) y por niveles estromatolíticos ( boundstones ) depositados en un ambiente de plataforma somera. Hacia el SO, la serie miocena pasa lateralmente a los sedimentos volcanoclásticos pertenecientes al cercano complejo volcánico del Gourougou. La similitud entre las facies de las tres unidades estratigráficas definidas en este trabajo y las de las unidades cronoestratigráficas descritas en la Cuenca de Melilla permite asignar una edad Messiniense para toda la serie terciaria del territorio de Melilla.

Peer Reviewed

Country
Spain
Keywords

Àrees temàtiques de la UPC::Enginyeria civil::Geologia, NE Rif, Messiniense, Geologia--Melilla, Facies, Melilla city, Sedimentology, Geology--Spain, Sedimentologia, Unidades estratigráficas, Messinian, Ciudad de Melilla, Stratigraphic units, :Enginyeria civil::Geologia [Àrees temàtiques de la UPC]

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green