OF NORTH OXFORDSHIRE AND THE CLYPEUS-GRIT. 



229 



Fig. 1. — Vertical Diagram Section, Hook Norton. (Scale 1 : 144.) 



Great Oolite. 



11 



E. Sanda and flaggy and andy 

 limestones. 



1 



D. Marly and sandy limestone J 



I 



C. Shelly limestone and sand ..< 



B. Sandy limestone 



A. Blue limestone < 



Upper Lias Clay 



Bored stone. 



Trigonia. 



Ostrea. 



Plant-bed. 

 Quenstedtia obliia. 



Amm. Parkinsoni. 

 Rhynchonella spinosa.' 

 Astarte minima. 

 Trigonia producta. Corals. 



Amm. Iceviusculus. 

 Lima punctata. 



Leda ovum. 

 Amm. fibulatus. 



of the Great Oolite. A trench at the end of the base of the northern 

 embankment shows the Middle Lias rock-bed of the zone of Am- 

 monites spinatus, with the characteristic JRhynclionella tetraedra and 

 Terebratula punctata and Edwardsii. Upon entering the cutting, the 

 Inferior Oolite beds are seen to be flexured and broken in their dip 

 with the slope of the hill j and it is not until the upper part of the 

 cutting is reached that the strata are sufficiently undisturbed to 

 allow of measurement with any degree of accuracy. That the ten 

 or twelve feet of blue clay, with numerous hard claystone nodules 

 is that of the superior division of the Upper Lias, the Leda ovum 

 beds, is evidenced by the following fossils : — 



Ammonites fibulatus. 



fonticulus. 



subplanatus. 



bifrons. 



sp. 



Belemnites subaduncatus. 



vulgaris. 



Cuculhea elegans. 



Leda ovum. 

 Thracia glabra. 

 Pleuromya rotundata. 

 Inoceramus dubius. 

 Mouotis substriata. 

 Discina reflexa. 

 Eryon. 

 Scales and bones of fish. 



The following is the section in the Oolites measured with the kind 

 help of Mr. Windoes : — 



