1859. j WRIGHT INFERIOR OOLITE. 31 



No. 18. Dark, laminated, carbonaceous, shaly bed, with stems in 

 a dark laminated shale and sand, passing downwards into dark clays 

 with the shells and impressions of Unios. It is about 4 feet thick. 



No. 18 a. A dark shale with ironstone. 2 feet. 



No. 18 6. Grey laminated sandstone. 1 foot. 



No. 19. The Gristhorpe plant-bed, rises opposite the pillar; it con- 

 sists of dark grey shale, containing within its lamina; a great number 

 of magnificent fossil plants in a fine state of preservation, in a thick- 

 ness of 2 feet. 



The same bed is seen in situ at Red Cliff, where it gradually 

 declines to the shore. The shale is underlain by a seam of imperfect 

 coal from 6 to 8 inches in thickness. 



This bed may be said to be the chief herbarium for most of the 

 species of fossil plants from the lower sandstones and shales of the 

 coast of Yorkshire, which are figured in the works of Prof. Phillips 

 and in the ' Fossil Flora ' of Lindley and Hutton. 



No. 20. Fine laminated sandstone, exhibiting wavy layers when 

 divided ; it forms a ledge which runs out to sea, and constitutes the 

 basal rock of the pillar on the island. It presents a low escarp- 

 ment to the north. The strata are separated by soft sandy marly 

 partings, which cause divisions in the bed in consequence of the 

 wearing away of the softer lamina?. I found no fossils. 12 feet. 



No. 21. A marine bed, formed of a brown, nodulated, ferruginous 

 sand-rock with ironstone-nodules, which project from the weathered 

 surface of the bed. It contains a few marine shells, as Pholudomya 

 Scemcmni, Lye, Gardiwm Icevigatu/m, Lye, Trigonia costata, Sow. 5 ft. 



No. 22. A white and grey laminated sandstone with shelly partings. 

 4 feet. 



No. 23. Ironstone-rock, full of iron-nodules, with partings of clay, 

 containing marine shells. Lima ii>t< rstlnrfd, Phil., and Serjpula in- 

 testinalis, Phil., were collected from it. 2 feet. 



No. 24. Lacustrine bed : greyish laminated shale, with the re- 

 mains of plants, interstratiticd with bands of sandstone. Few speci- 

 uii us me obtained from this bed. 4 feet. 



No. 25. A dark-grey clay, exposed at low water, and containing 

 the remains of plants in its upper portion, and comparatively un- 

 fossiliferous in its Lower division. This bed is well seen in the 

 coast-section ;it Eaibuni and Btainton Dale dill's, where it becomes 

 more sandy, and passes into the block-sandstone which tests upon 

 the Millepore-bed. Mr. Leckenby collected Owpria? concentrica, Bean, 



from the davs of this bed at Gfristhorpe, where it is about In feel 

 thick. 



.No. 26. The marine bed. The Millejiore-beil rises in the form 

 of a ret' beyond the grey clays of the preceding i) l( l, exhibiting 



another change from lacustrine to marine conditions. It is an 



obliquely laminated partly oolitic rock, containing oxide of iron in 

 the partings, and is full <A' the fragments of Orinoidea, Folyxoa, 

 Serpula, and the plates ami spines of Echmodermata. This rook 

 i- likewise exposed al Bed Book, Ewe Nab, Clonghton Wjke, 



llaiburn \V\k<\ and Stainton Dalo Cliffs, and tin- Peak, It forms 



