88 



PBOCEEDINGS OF THE GEOLOGICAL SOCIETY. [DeC. 21, 



APPENDIX. 



Details of General Section of Lower Eocene deposits at Portsmouth 

 {DocTcyard Extension Worlcs), commencing ivith the highest strata 

 exposed. 



feet, inches. 

 ^ /Brownish sandy clay, with thin partings 



"3 of sand 25 Zone oi Pleurotoma 



(3 Sandy clay 5 



02 l^ Sand, with small nodules of claystone ... 



' Brownish sandy clay 4 



Septaria 



Brownish clay 5 



Septaria 



Layer of greasy clay 



Stiff greyish clay, with thin partings of sand 5 



Sand, with pyrites 



Stiff greyish-brown clay 2 



Septaria 



Stiff greyish-brown clay 5 



Sandy clay 



Stiff greyish-brown clay 2 





4 

 3 

 

 



9 Zone of Pectunculus. 







2 



2 



Oi 



1 







Zone of Ajporrhais 

 Sowerbii. 



Thin layer of Pinna ; crushed, and much 

 decomposed. (These shells appear to 



have been whole when deposited.) 



Thin seam of greasy clay 



, Stiff greyish-brown clay 2 



^ . r Brownish clay, with rounded black flint 

 So \ pebbles 



fS L 



Greenish sands, finely bedded and inter- 

 stratified with thin lines of clay and 

 fragments of carbonaceous matter. 

 Fossils numerous , 



Zone of Cyprina 

 planata. 

 2 



10 Zone of Pholadomya 

 margaritacea. 



Zone of Pinna. 

 Zone of Panopaa. 







10 Zone of Cytherea 

 ta. 



Layer of greenish chloritous sand, crowded 

 with fossils, and forming the nucleus of 

 a zone of large concretions of shell-rock 







02 I. Argillaceous sand, slightly mottled 5 



Sand, with double band of tabular Clay- 

 stone or Septaria, containing thin lines 



of vegetable matter 1 



Greyish-brown (or greenish-brown) mot- 

 tled sand, with thin seams of clay 6 



Septaria, at wide intervals 



Greenish-grey argillaceous sand, mottled 



and veined with clay 4 



\ Layer of finely laminated sand, nearly 



white when dry 



(This bed is very constant in thickness 



within the area of the excavations.) 

 Greyish argillaceous sands, slightly mottled 4 



^ 



Septaria 



I, Greyish argillaceous sand, or sandy clay 5 



Zone of Panopaa in- 

 termedia. 



Zone of Cytherea 

 ■proxima, &c. &c. 





 



6 Zone of Pholas 



6 Zoneoi Car dium Lay - 

 toni and Cytherea 

 suessoniensis, Desh. 







