THE 



QUARTERLY JOURNAL 



OF 



THE GEOLOGICAL SOCIETY OF LONDON. 



Vol. LXIX. 



1. The Lower Palaeozoic Rocks of the Cad-teey District (Yobk- 

 shirb). By John Edward Marr, Sc.D., F.R.S., F.G.S. (Read 

 December 4th, 1912.) 



The object of this paper is to establish a more detailed succession? 

 for the Ordovician rocks of the district, and to offer some notes upon 

 the faunas of the Silurian rocks, the detailed succession of which' 

 has already been established. 



I wish to thank the members of a party who accompanied me on> 

 an excursion, for much help in collecting. They were Messrs. A.. 

 W. E. Don, W. B. R. King, R. U. E. Knox, T. C. Nicholas*. 

 J. Romanes, and Bernard Smith. My son, F. A. Marr, has also' 

 rendered much assistance on several occasions. Fossils were 

 collected on Sally Brow many years ago by Prof. McKenny Hughes T 

 and Mr. Fearnsides has also supplied several specimens. I would 

 especially thank Mr. J. Middlebrook, who placed his valuable local 

 collection at my disposal, and ultimately presented it to the Sedgwick 

 Museum. 



I am greatly indebted to Miss G. L. Elles, D.Sc, for her kindness, 

 in identifying the Ordovician graptolites. 



The Geological Survey Memoir, ' The Geology of the Country 

 around Mallerstang ....,' explanatory of Quarter-Sheet 97 NVW.. 

 (n. s. Sheet 40), has naturally been of great use. In this memoir a 1 

 bibliography of the geology of the area up to the time of its publi- 

 cation (1891) is given ; this renders it unnecessary to append one- 

 here. 



Q. J. G. S. No. 273 



