120 FAULT IN THE CLIFF WEST OF BRIDPOKT HAHBOUIl. 



number, belonging to the Lower Fuller's Earth, reach the level of 

 the beach. These can be traced more or less perfectly, according 

 to the state of the cliff, rising eastward at an angle of 34. Up to 

 this point the clay composing the bulk of the cliffs is of a very 

 much darker colour than that further west : this is seen best in dry 

 weather, and was once specially noted by Mr. Walker when 

 passing the coast in Mr. Thompson Stephens' steam launch, and 

 suggested to Mr. Walker that at this point we have an important, 

 though hitherto unobserved, Fault in the Fuller's Earth itself. 

 Both the bands of the rock and the clay between contain abundance 

 of Rhynchonella Smithii, also specimens of T. globata and 

 Waldheimia omithocephala, nearly always crushed, and more 

 rarely Acantliothyris spinosa, var. Poorstockensis. The rock also 

 contains a costate Trigonia, allied to Trigonia elongata, from which 

 it appears to differ by the costse being more numerous (we propose 

 to call it variety Stephensi), a large Pholodomya, Modiola yiblosa 

 var., Ostrea accuminata, which occurs sometimes in masses, and 

 various bivalves too imperfect to determine ; also a small Belemnite, 

 B. parallela. This section of the Cliff is clearly Lower Fuller's 

 Earth. 



Beyond this point the Cliff, stretching towards Eype, appears to 

 be Upper Fuller's Earth. It is paler in colour, and contains very 

 few fossils, except some imperfect bivalves, and these are far from 

 plentiful. This stratum gradually passes into Bradford Clay and 

 Forest Marble, with which it is capped for a considerable distance. 

 The same bed may be observed in the Cliffs beyond Burton. 

 Bradstock, where it is more fossiliferous, containing gasteropoda 

 as well as bivalves ; but neither there nor towards Eype does the 

 Upper Fuller's Earth contain any of the fossils which occur in the 

 lower clay. Mr. Walker is of opinion that the Lower Fuller's 

 Earth (with the stone-bands) belongs to the 1.0. series, while the 

 Upper Fuller's Earth, which appears to be faulted against the 

 Lower, belongs to the Great Oolite series, and may represent that 

 bed. It i.s not an unusual occurrence for a rock which is limestone 

 in one place to be represented in other districts by a band of clay. 



