xv. SECTION OF SHOTOVER HILL. 413 



D. Kimmeridge clay. Here only about 100 feet thick. At its 

 base are scattered a few Coprolites ; a few feet upward we find 

 Thracia depressa, Giyphsea virgula j still higher, two ' flats ' of 

 Ostrea deltoidea ; and at a height of fifteen feet a limestone-band, 

 partly septariate, yielding Rhynchonella inconstans, and occa- 

 sionally Pleiosaurian, Ichthyosaurian, and Steneosaurian bones, 

 which also occur below it. 



E. The Portland sands, with included rock-bands and hard nodules, 

 rich in shells, 70 or 80 feet. The most cemented masses 

 of rock in the lower part have been quarried. The uppermost 

 part is greensand ; and small grains of silicate of iron are 

 scattered through the whole of the rock. There is an in- 

 cluded bed of clay, three feet thick. Fossils of the Portland 

 series are traced through the whole, even up to the top, 

 such as 



Astarte cuneata. Buccinum naticoideum. 



Cardium dissimile. Cerithium portlandicum. 



Ostrea expansa. Littorina paucisulcata. 



Pecten lamellosus. Natica elegans. 



Perna mytilloides. Pleurotomaria rugata. 



Pholadomya rustica. Ammonites triplex. 



Trigonia gibbosa. (No Belemnite is seen.) 



F. Iron-sand-and-ochre-series to the top of the hill, 80 feet. The 

 whole consists of yellow and white sands, varied with brown 

 and even black colour, sandstones, sometimes cherty ; nodular 

 and geodic formations of oxide of iron, bands of white clay, 

 and local accumulations of ochre. Mr. Conybeare presents the 

 following section g : 



ft. in. 

 Beds of highly ferruginous grit, forming the summit of the hill 6 o 



Grey sand 3 



Ferruginous concretions I o 



Yellow sand . . . . . . * . . . . 60 



Cream-coloured loam x . 4 



Ochre "V J . . 06 



Clay 1 thickness 



Ochre /not given. 



Ferruginous sands, cherty and argillaceous loams of a deep cream - 

 colour ; 4 



S Greol. of England, p. 139. 



