The Hirnant beds and the base of the Valentian
By: by O.T. Jones.
Publisher: Dulau & Co.
Published: 1923
Place of publication: London
Language: eng
Number of pages: 519
Subjects: Geology, Stratigraphic -- Ordovician.
Other titles: Geological magazine.
Notes: Extracted from the Geological Magazine, vol. LX, no. 713, November, 1923.

Cover title.