Durante el Jurásico Medio, son comunes a lo largo del Tethys
suroccidental las plataformas carbonatadas caracterizadas por facies
granosostenidas, dominados por granos no esqueléticos. Las facies oolíticas
y peloidales se desarrollaron ampliamente en la Plataforma Aragonesa
(Cuenca Ibérica) durante el Bajociense-Bathoniense. El estudio de tres
afloramientos localizados entre Obón y Ariño (Cordillera Ibérica) ha permitido
la reconstrucción de los dominios sedimentarios de una plataforma
dominada por facies oolíticas, peloidales y bioclásticas. Se ha caracterizado
la transición entre las áreas someras agitadas (oolíticas) a áreas
relativamente más profundas y poco agitadas (peloidales). La distribución
de facies observadas a partir de la correlación de los tres perfiles permite
discutir la influencia de las variaciones relativas del nivel del mar
During the Bathonian (Middle Jurassic), deposition of grain-supported
oolitic facies was common in the shallow domains of the carbonate platforms
found along the southwestern Tethys. Oolitic and peloidal facies were
also developed in certain marginal areas of the Iberian Basin.A bed-by-bed
study of three Bajocian-Bathonian successions in the southeastern part of the
Aragonese Platform (NE Spain) allows analyzing the lateral variability of oolitic
to peloidal grain-supported facies. Seven different facies have been identified,
from oolitic grainstone (inner ramp) to peloidal and bioclastic
packstone (middle ramp). The study of the lateral relations of these facies
allows identifying the sedimentary environment where they were formed.
Overall facies distribution was related to long-term relative sea level changes