412 [May 1, 



Thickness and Description of Strata. 

 [Gault, with Fossils.] 



Thickness 

 in feet. 



64, Iron band, fragments of fossils - - - . - i 



63. Dark sand - - . . _ _ _2 



62. Iron band - - - . _ _ . i 



61. Dark sand - -. . - , . -2 



60. Iron band - - . - „ _ .j 



59. Dark sand - .. - . . _ _2 



58. Iron band - - - _ _ . _2 



57. Iron clay and sand - - - - _ -12 



56. At the top, white sand ; at the bottom, black sand and clay - 11 



55. Iron at the top, and sand - - - - . - 3^ 



54. Iron at the top, and dark yellow sand - - - - 4 



.53. Yellow sand and clay - - - - . - 6 

 52. Blue clay --.-_ __2 



51. Yellow and white sand, very quartzose - .. . _ 15 



50. Above, white sand, tolerably solid at the top, clay and sand in the 



middle, and white sand at the bottom - - - - 1 9 

 49. Black clay (perhaps lignite) with brown sand in thin lamina;, tolera- 

 bly even, but in some parts wavy - - - - 17 

 48. Yellow sand and blue clay, thinly laminated in some parts, wavy at 



the bottom, the sand white - - - .. - 31 



47. A second white sand, tolerably solid - . - - 13 



(No. 31. crops out on the shore, a little to the west of Blackgang 

 Chine.) 



46. Blue sand and some clay - - . - . - 32 



45. A line of nodules at the top, and blue sand and some clay below - 33 



44. Third white sand, with tolerably solid yellow at the bottom. This 



stratum runs up from Rocken End - - - -22 



43. Three sorts of black clay and sand - - . - 40 



42. Iron, fossiliferous, top of Blackgang- Chine Waterfall . 1 



(No. 24, (the Terebratula zone) crops out on the shore.) 



41. Sand and clay varying from brown to black - - - 4 



40. Iron, fossiliferous - - . , . . _ ^ 



39. White sand, tolerably solid, yellow on the surface ; near the top there 

 are laminaa of pebbles ; the bottom of it is in thin lamina;, divided 

 by blue sand and clay - - - . . -11 



38. Iron, fossiliferous - - - . . . .j 



37. White sand - - . . . _ -10 



36. Blue clay and sand, the blue very conspicuous - - . 1 



35. Iron at the top, with fossils ; dark sand below - . - 26 



(Nos. 22. and 23. nodules crop out on the shore.) 

 34. Iron at the top, fossiliferous, and dark sand below - - - 18 



33. Iron, fossiliferous, and grey sand below, much used for making mor- 

 tar. Bottom of Blackgang - . . . - 28 

 (No, 21. nodules crop out on the shore.) 

 32. Iron, fossiliferous, and white sand below - . . - 9 

 31. Thin very wavy lamina of black clay (or lignite) full of pyrites, 



with a layer of spongiform nodules near the bottom - - 25 



( No. 20. nodules crop out on the shore. ) 

 30. Iron at the top, fossiliferous, with dark sand - - > - 2 



