>ot aW 



v e A 





J Sc.fi, 





■■'^edsofy 



i: 



i,s surface 



4i 



; 



"unienn 



a 1 1 >ne geri 

 Dorset. 



bitumnc 



tone beds 

 n is covered 

 (cirri/, nta 



higstont 



eUy K# 



•ous v 



ahi: 



A7^ 



i 



fcr 



Jiit 



I -hale= of 



,us ft* 



?r 



.S* 



fr 



a** 



q« 



^ 



5 



- ^ 

 the J " 



EOCENE LIMESTONES. 



81 



86. 



Purbeck limestone, //are? blue limestone, chiefly UpHBB 

 composed of broken freshwater or estuary shells (Cyrlas or Galiesy - 



Cyrena) with specks of green matter Peverel Point, Wall-case 43. 



Swanage, Dorset. 



From the upper part probably of the comminuted shell 

 limestone of the Upper Purbeck series : at Peverel Point, 

 this bed attains a thickness of ten feet. It is used for build- 

 ing purposes, and is called "soft burr" by the quarrymen. 



87.— Lias limestone, shelly limestone. — (Lower bed of 



) 



Bay 



88. — Purbeck limestone, hard shelly limestone, made 



Durlston Bay, coast of 



Pt 



Dorset. 



89 — Purbeck limestone, shelly limestone, with brackish- 

 water shells ; small Oyster, Cyrena, Sfc. — Kingston, near 

 Swanage, Dorset. 



90. — Sussex marble, polished specimen of shelly lime- 

 stone {Wealden) containing numerous freshwater shells 

 (Paludina). — Weald of Kent and Sussex. 



From the occurrence of this limestone in the Wealden 

 of Sussex it has received the name of " Sussex marble," 

 and has been much used for ancient tombs and sepul- 

 chral monuments. It bears a strong general resemblance 

 to the Purbeck marble, (see Nos. 1 and 8,) but may always 

 be distinguished from the latter, by the greater size of the 

 shells contained in it. — H.W.B. 



91. 



•Middle eocene limestone, containing numerous 



Paludina 



One mile 



of Byd, 



if 



IS 



Wight. 



This bed is from the Nettlestone grit series, that 

 from the lower member of the two divisions, into which 

 the Osborne group was divided by Professor Edward 

 Forbes. This last constitutes the upper portion of the 



middle Eocene. " At the western extremity of the Isle 

 of Wight, the Osborne series is represented by marls and 

 clays, for the most part unfossiliferous, which, at the 

 eastern extremity of the Island are replaced by grits and 



