TY  - SER
AU  - Wood, Alan 
TI  - The origin of the structure known as guilielmites
KW  - Origin - Structure of Guilielmites
KW  - Palaeontological work - Coalfield - North Wales
N2  - Extract
During the course of palaeontological work in the North Wales coalfield, shining discoidal bodies were noticed on the bedding planes of various shales. They were found to be identical with objects described as Guilielmites by Geinitz (4) in 1858. The literature concerning them is reviewed below, and a new theory of their origin is advanced
ER  -