Posidonia Shale
The Posidonia Shale ( , also called Sachrang Formation , Schwarzerschiefer , Lias-Epsilon-Schiefer , Bächental-Schichten and Ölschiefer Formation ) is an Early Jurassic ( Toarcian ) geological formation of southwestern Germany , northern Switzerland , northwestern Austria , southeast Luxembourg and the Netherlands , including exceptionally well-preserved complete skeletons of fossil marine fish and reptiles . 
<triplet> Posidonia Shale <subj> Germany <obj> country <triplet> Toarcian <subj> Early Jurassic <obj> part of