THE 



QUARTERLY JOURNAL 



OF 



THE GEOLOGICAL SOCIETY OF LONDON. 



Vol. LXXIV 



FOR 1918. 



1. On the Geology of the Old Radnor District, with special 

 reference to an Algal Development in the Woolhope 

 Limestone. By Edmund Johnston Garwood, Sc.D., 

 F.R.S., Yates- Golclsmid Professor o£ Geology in University 

 College, London, and Edith Goodyeak, B.Sc. (Read 

 June 6th, 1917.) 



[Plates I- VII.] 



Contents. 



Page 

 I. Introduction 1 



II. The Old Radnor Inlier 4 



(a) The Pre-Cambrian (Longmyndian) Rocks. 



(6) The Position of the Old Radnor Rocks in the 



Longmyndian Series. 



(c) The Woolhope Limestone. 



(d) The Included Shale-Band. 



(e) The Wenlock Shale. 



III. The Nash Scar Limestone 20 



IV. Movements in the District 22 



V. Description of Solenopora gracil is, sp. nov 27 



I. Introduction. 



The district which forms the subject of this communication has 

 received but scanty attention in geological literature since the time 

 of Murchison. Only one edition of the 1-inch Geological Survey 

 Q. J. G. S. No. 293. u 



