The Tholeiite Dikes of the North of England
Arthur Holmes and H. F. Harwood
Professor of Geology, The University, Durham
Lecturer in Chemistry, Imperial College, London.
1The eight new chemical analyses (and calculations of norms) presented in this paper have been made by Dr. Harwood. The field work and petrological investigations have been carried out by Professor Holmes, who is also responsible for the writing of the paper.