Memoirs of the Geological Survey; Special Reports on the Mineral Resources of Great Britain

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. It was not until many years later that careful investigation in several distinct localities revealed the true succession of the rocks and the distribution among them Of the fossils (graptolites) which they contain. ...