232 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jan. 21, 



yielded little else beside the dermal studs of Thelodus, fragments of 

 Lingulce, and a large percentage of ferruginous inorganic grains. 



A section of about 80 feet, through the Old Red to the lowest 

 Silurian bed exposed, gives us the following series of deposits* : — 



Fig. 2. — Vertical Section of the Beds exposed at Linley Brook. 



"-'J*!! ."V- '■' .'' : - ,: •"-- '- '■'■.: a 



a. Northern drift with boulders. ft. in. 



b. Upper coal-measures, containing a band 



of limestone. 



c. Red clays, unfossiliferous ..... 60 



d. Light-coloured grits, with Plant-re- 



mains — Juncites ?, Lycopodites, &c. . 20 



e. Hard micaceous grits, somewhat flaggy, 



and charged with Fish-remains. (The 

 Upper Bone-bed.) 7 



f. Flagstones bearing current-markings . 1 9 



g. Micaceous sandy grits with Lingulce . 11 

 h. Greenish, irregularly laminated rock 



with conglomerate 10 



i. Hard calcareous grit with thickly dis- 

 seminated greenish grains and many 

 broken Lingulce 10 



Jc. Laminated light-grey micaceous and 



sandy shales 20 



I. Grey micaceous grit 6 



m. Micaceous sandy clays, coloured by 



peroxide of iron 6 



n. Yellowish sandstones (Downton series) 

 with Beyrichice and Lingulce, and in- 

 cluding two or more ferruginous bands 

 containing large quantities of the der- 

 mal studs of Thelodus, fragments of 

 Lingulce,&nd minute crystals of quartz. 

 (The Lower or Ludlow Bone-bed.) 

 Clusters of Modiolopsis complanata 

 occur at the base of this rock ... 80 



o. Hard calcareous shales with Fish-re- 

 mains, Lingulce, &c 6 



p. Flaggy beds of impure limestones, with 

 Serpulites longissimus. (True Upper 

 Ludlow.) 4 



q. Hard, impure limestone. (Aymestry 

 series,) 



82 2 



9 =f 



* In these sections, Lingula cornea ranges up to 

 the summit of the bed c. 



