I860.] 



IRi:>! wr<!I — L03TD0N CLit IX NORFOLK. 



I-"! 



Depth. tent. 



feet. 



:i.">u 32. Micaceous sandy day. 



358 33. Same as 31. 



370 34. „ 82, 



380 35. Brown sandy clay. 



380 30. Grey clay, with decomposing iron- pyrites. 



§90 37. Brown clay. 



400 38. The same.' 



410 30. Brown micaceous sandy clay. 



4'_'0 40. Brownish sandy clay. 



430 41. The same. 



440 42. Dark-brown sandy clay. 



450 43. The same, with soft green grains. 



400 44. Tough brown clay. 



470 45. The same. 



475 40. Fragments of soft septan a. 



480 47. Grey clay, with lignite. 



I'm) fe. Tough brown clay. 



600 49. Streaky dad-grey clay. 



.">o:> 5i>. Grey clay and green sand. 



510 51. The same, more mi vl. 



.~>l."> 52. The same, with more green sand. 



520 53. The Bame, with less green sand. 



525 54. Pure dark-green sand. 



BBS 55. The same, more clayey and with small dnrk- 



green-coated flints. 

 527-97.56. Chalk with flints. 



LoxnoN 

 Clay. 



310 



f.'H. 



Chalk 57 + 



This section is of interest for more reasons than one. In the first 

 place, it shows how recent the immediate ground is on which Yar- 

 mouth Btandsj it being nothing more than blown dune-sands and 

 beach-shingle. 



2nd. Beneath the .-and and shingle we haye the opportunity 

 (rarely offered) of tracing jn complete section of a very recent estua- 

 rine deposit. It consists of 120 feet of tranquilly deposited sand and 

 silt in alternating beds. Unfortunately, the shells being in such a 

 fragmentary state, few speciee can be determined. 1 have been 



aided in these by Mr. RoSO, of Yarmouth, who had carefully L r "!i.> 



through all the specimens again, and made the a& 

 A considerable portion of the fragments have evidently been washed 

 out of the adjacent Crag, Which at that time probably extended in 

 exposed banks on either side of the old river-estuary. I do n->t, 

 however, believe thai any portion of the 120 feet belongs bo the I 

 itself; there is too much onifbrmity throughout the mass, and it is 

 rgillaceous. The level of the adjacent Crag is higher; and there 

 is no reason bo suspect s depression in the Londota Clay anterior to 

 the Crag-p ddent with the depression in the roi ent sui 



or in the Chalk ; and all the fragment mch shelh 



1 trc 1 i \ in lc u wed as Crag apt 



3rd, At the depth of 17" feel the beds change so suddenly, and 

 the fa imetl, with its small light-brown concretion, 



like an ordinary specimi I I adon clay, that t 1 its 



resemblance, bul without at all suspecting the London < 

 there. vThi :.. .1 passe i with 



