Aye formation

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Aye Formation is a Geologic Formation at the Base of the Middle Famennian. It is characterized by a conodont Palmatolepis rhomboidea. It is found in the southern part of the Dinant Synclinorium. Its former name was Aye shales or schists.[1]

It is composed of greenish shale with alternating interbedded greenish argillaceous platy siltstone beds and lenticular (some cm thick) fine-grained sandstone and siltstone. As it formed in an offshore position, in a subtidal wave-influenced environment, bioturbation is important and is translated by cross-bedding structures.[1]

The Stratotype is located in the area of Houyet and Aye in Belgium.[1]