On an Unconformable Break at the Base of the Cambrian Rocks near Llanberris
- 1 February 1878
- journal article
- Published by Geological Society of London in Quarterly Journal of the Geological Society
- Vol. 34 (1-4), 764-768
- https://doi.org/10.1144/gsl.jgs.1878.034.01-04.48