United Kingdom and Ireland UK
Geological Time: Jurassic Upper Jurassic Tithonian
Kimmeridge Clay Formation
The raw material was collected by Dr. Steve Etches and sent to us by Chris Webb. Specimens were picked and photographed by
The identification is based upon:
, : Bornemann, J. G. (1854). Ueber die Liasformation in der Umgegend von Göttingen und ihre organischen Einschlüsse : (mit einer geognostischen Skizze und drei Steindrucktafeln). 1-77. Plate , Fig.