PATTISON— LAND SURFACE UNDETINEATII TIIE DRIFT. 207 



the precise age of the formation an open question, and to remain 

 satisfied for the present with having arrived at the conclusion that 

 the Older Parian deposits in Trinidad, and the rocks of similar age 

 in South America, cannot be newer than the Gault. 



List of fossils found by the Government geologists in the Older 

 Parian at Cumana : — Pteroceras, Cerithium, Turritella, Trigonia sub- 

 crenulata, D'Orb., Astrea Couloni, Area, Cardium, Echinus. 



Those found in Trinidad since the survey, and alluded to in the 

 above paper, but not included in the foregoing list : — JBelemnites, Pos- 

 tellaria ?* Natica ?, Cytherca ?, Plagiostoma ?, Pecten alatus ?,t 

 Ostrea, 2 sp. 



DESCRIPTION OF A LAND SURFACE UNDERNEATH 

 THE DRIFT ON THE COAST OF SUFFOLK; OB- 

 SERVED IN 1859. 



By S. R. Pattison, Esq., F.G.S. 



The low cliffs stretching from Gorleston, south of Yarmouth, to- 

 wards Lowestoft, are mainly composed of boulder drift, and are well 

 described by the late Mr. Trimmer in the Quarterly Journal of the 

 Geological Society for 1857. As an independent confirmation of his 

 observations on the intercalation of the whole boulder-clay double 

 series, between the fluvio-marine and forest bed beneath, and the 

 local marls and marsh and estuary beds occasionally above, I send 

 the following note, made without having had the benefit of Mr. 

 Trimmer's paper. 



On the beach under Corton the section is as follows : — 



Feet. 



Mould 2 



Disturbed ferruginous sand 10 



Alternations of gravel and sand, frequently interchanging. 

 Gravel well rounded and small. Large masses of dark clay 

 entangled in the gravel with lumps of chalk. Small rolled 

 pebbles of chalk, boulders of slate rock, coal-measures, green- 

 stone, red sandstone, oolites (very abundant), having an 



average depth of 30 



Clean brown sand, with occasional very small pebbles .... 40 

 An irregular bed of peat, surface and contents of marshes, com- 

 pressed rush-like plants matted together, and much mine- 

 ralized with sulphate of iron 2 



An irregular surface below the bog, covered with roots and lower 

 portions of stems of ferns (Pferis ?) in situ, in a dirt-bed ; oc- 

 casionally large trees 5 



Dark clay, with a greenish tinge, underlying the heath-like de- 



Pcrl 



apa the Pteroceras of the Geological Survey. t Possibly an Avicula. 



