﻿4l>8 



MR. L. RICHARDSON ON THE OCCURRENCE OF [Aug. I905. 



4. Marl, bluish-grey 



Thickness in feet inches. 







? i 



O <B 



03 55 



Limestone, bluish-grey: 

 inches. 



Marl, blue and yellowis' 

 Dark limestone.... 



2 to 5 



h-br 



( Ostrea liassica, Moeliola 



I mijiima, Lima gi- 



o \ gantea, Parallelodon 









 8. Marl, blue and yellowish 



9. Dark limestone. 



Shale, brown and grey 

 Hard, dark limestone . 



o 



2^ 

 2| 

 5 



5 

 3 



hcttangiensis, Pleuro- 

 mya ; radioles of 

 ^ Pseudodiaclema. 



Ostrea liassica. 



Ostrea liassica, Moeliola 



minima. 



Modiola minima, Ostrea 

 liassica. 



I 12. 



U3. 



Upper 



KlLETIC. 



Marl 2 



Limestone.... 2 



[Gap, but not more than 

 f Marls, bluish -grey and pale- 

 [ yellow, with an indurated band 



I near the top about 9 



foa. Shales, black, clayey about 1 



5 b, Limestone, arenaceous, rust- 

 coloured 



feet,] 



6. Shales, black, imperfectly laminated 1 



7. Limestone, grey, arenaceous, weather- 



ing brown 







' 











[ Ostrea fimbriata (?), 



0.1 



Moore ; fish-scales 





(rare). 









*< 



8 a. Shales, black, tough, laminated. 

 8 h. Shales, grey and yellow, clayey. 



9. Sandstone, white, micaceous ... 



/Comminuted fish - 

 I scales; Schizodus (1); 

 0|-{ fragments of a radiole 

 I and a Pteria (Avi- 

 \ cula) contorta,. 

 Ostracods (?). 



10. Shale, black 



11. Sandstone, white, 



micaceous 



12. Shale, grey, clayey 



^13. Sandstone, white, micaceous 



( f Clay and green marl resting 



I I. ' Tea- I upon a yellowish-brown 



j Green \ deposit 



j Marls.' I Red marl 



[^ Greenish marls about 



\\\. Red Marls. 



11 



5 



0| 

 6 



0" 



0] 



Full of cavities, at one 

 time occupied by 

 scales of Gyrol&pis. 



The Lower Pecten-~Bed, usually in this county and Gloucestershire 

 a well-developed limestone-bed, is here only half-an-inch thick. 

 The Upper Pecten-Bed (5 b) is also feebly represented, but it con- 

 tained a plicated Ostrea (fragments), possibly the precursor of the 

 Alectryonia of the Inferior Oolite, which may be tentatively com- 

 pared with Charles Moore's Ostrea fimbriata} 



The superincumbent shales are dark and marly at the base, but 

 become paler above and more calcareous. In default of fossils, an 

 arbitrary line of division must be drawn between the two stages of 

 the EhaBtic Series. 



1 Quart. Journ. Geol. Soc. vol. xvii (1861) p. 501 & pi. 



fig. 24. 



