[ 237 ] 



General Stratigraphical Table of the Formations described in the preceding 



pages, but in descending order. 



GREAT OR BATH OOLITE. 



Cloughton Wyke and White Nab, 30 feet. 

 Layers of nodular ironstone and argilla- 

 ceous oolite 3 feet. 



Clay 1 



Nodular ironstone, 6 inches to 1 



Hard, blue clay, often much tinged with 



iron 2 



Hard, blue, fine-grained oohte, some- 

 times ironshot 6 



A hard, blue limestone 14 to 20 



Cayton Bay, South Point, 51 feet. 



Soft beds of argillaceous oolite 3 feet. 



Sandstone and carbonaceous shales . . 9 



Sandstone 1 



Tenacious blue shale ; lower part car- 

 bonaceous : Gristhorpe plants .... 4 



Impure coal 3 inch. 



Alternating sandsts., ironsts., & shales 25 feet. 



Irony nodules 1 



Hard granular bed, very much ironshot, 



especially at the fissures 8 



LOWER CARBONIFEROUS SERIES.— Cloughton W^jhe and Blue Wick, 280 feet. 

 A group of sandstones and shales, divided as follows : — 



Laminated sandstone, containing numerous remains of beautiful ferns and 



cycadean plants 6 feet. 



Hard, grey sandstone 5 



Dark, shaly sandstone 8 



— 20 feet. 

 Sandstones and shales of varying thicknesses. The sandstones are hard, fissile, and used 



as flags ; total thickness about 170 



Black shale 5 



Soft yellow sandstone, containing stems of Equisetum columnare in a vertical position, 



with their roots downwards 8 



Gritty sandstone 20 



Shale 10 



Hard, pale, gritty sandstone 20 



Ironstone, containing a large species of Calamites, fonds of Zamia gigas, &c 20 



Black carbonaceous shale, no vegetable impressions ; about 10 



INFERIOR OOLITE.— Blue Wick, 83 feet. 



Hard ironstone 8 



Hard ironstone 4 



Irregular beds of yellow sandstone, in some parts ironshot 30 



Hard ironshot sandstone 1 1 



Irregular beds of yellow sandstone 20 



Thick beds of dark grey finely grained sandstone 20 



LIAS. Upper Lias or Jlum Shale, 175 to 180 feet. 



Shale, soft and rubbly, breaking into very small fragments, average thickness about . . 130 



Hard tenacious shale ; the laminae break into large fragments 30 



Soft shale 15 to 20 



Marlstone, between Staithes and Salthurn, 130 feet. 



Sandy shales, divided by bands of argillaceous irony nodules, 6 inches thick 30 



Sandstone and shale 100 



Lower Lias, Peakhill. 

 In the upper beds the marl is shaly, in the lower, compact, arenaceous, and generally of 



a dull blue colour, visible thickness 300 



