«Mud-mounds» en sedimentos lacustres someros del Mioceno medio de la cuenca de Madrid
DOI:
https://doi.org/10.3989/egeol.85415-6716Keywords:
Carbonate buildups, Rhizoliths, Lacustrine environment, Continental sedimentation, Miocene, Madrid Basin.Abstract
Several non-tuffaceous carbonate buildups have been recognized in middle Miocene sediments of the Madrid Basin. Facies associations lead to conclude that carbonate buildups developed in shallow lacustrine areas, Detailed morphology and internal structure of the buildups are shown. A dense, sometimes discontinuous, rhizolith network is displayed in the mud-mound cores whereas surficial dessicated crusts are commonly observed in the outer parto Small wedge-c1astic breccias from eroded flanks of the buildups have been locally distinguished as well. Mud-mound growth took place through successive stages controlled by lake level oscillations.
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