Oncolite
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Recent oncoid with limestone nucleus
Recent oncoid with Unio pictorum nucleus
Recent oncoid with limestone nucleus
Recent oncoid, surface
Oncolites formed around the Middle Jurassic gastropod Bactroptyxis trachaea (Normandy, France).
Oncolites in the Alamo bolide impact breccia (Guilmette Formation, Late Devonian, Frasnian) near Hancock Summit, Pahranagat Range, Nevada.
Oncolites in the Crown Point Formation (Ordovician) at the Crown Point Historical Site, New York
