Facies distribution on a carbonate ramp controlled by underground relief and subsidence (Late Eocene of the eastern Alpine Foreland Basin)

 

12. Reconstruction - Stage 1

Erosion on swells and deposition in depressions start to fill up of the underground relief with quartz sand. In the northern area, these coastal quartz sands grade laterally into quartz sands rich in algal branches and finally into Maerl. Maerl sediments cover wide areas, cut by quartz sand channels. The formation of a crustose coralline-coral framework in a trough was favoured by its protected position.

Nummulitid sandstones below the fair-weather wave base are deposited in the southern area. The high terrigenous input hinders the formation of maerl sediments.

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