EXPLANATION OF THE PLATES. 



Fig. 10. Coast section near White Nore. 



Fig. 11. Fault in the ClifFs, a little W. of White Nore. 



Fig. 12. Theoretical diagram representing the manner in which different rocks may be seen 

 in contact, in consequence of various degrees of denudation, on the same fault. Il- 

 lustrations of this may be found in Sutton Valley ; — whei'e there is little or no denu- 

 dation, the Portland Stone and Chalk are in contact at the surface ; where a denuda- 

 tion occurs to the depth of the curved line a a, the Portland Stone and Green Sand 

 are in contact, on opposites sides of the fault ; at the depth b b, the Portland Sand 

 and green sand touch each other ; and at the depth c c, the Kimmeridge clay touches 

 green sand. 



Fig. 13. Fault in the cliff west of Bridport Harbour. 



Fig. 13 a. Eastern termination of the Bridport Harbour fault. 



Fig. 14. Section from the cliff west of Bridport Harbour to Askerswell. 



Plate III. 



Fig. ]. Tabular and proportional view of the strata in the Weymouth district. 



a. Angular flints and plastic clay. 



b. Chalk. 



c. Chalk interspersed with grains of green earth (Craie chloritee). 



d. Indurated green sand, with quartz grains and quartzose sandstone. 



e. Greenish brown sands with indurated concretions. 



f. Light brown sands. Fox mould. 



g. Green sandy marl beds, with nodules similar to the cow-stone at Lyme Regis. 

 h. Purbeck beds. 



i. Dirt bed, above the Portland beds, frequently contains rolled calcareous 

 pebbles, and fossil silicified trunks of large coniferous trees, and of Cyca- 

 deoideae. 



k. Best beds of the Portland Stone. 



/. Compact light-coloured limestone, with beds, seams, and nodules of chert. 

 m. Grey shelly beds, the base of the Portland Stone. 



n. Green, brown, and grey sands and sandstones. 



o. Brown and grey sandy marls, with indurated nodules. 

 p. Kimmeridge clay, contains an abundance of deltoid oysters. 



q. Clay ironstone in the lower part of the Kimmeridge clay. 



r. Upper grit beds, containing deltoid oysters : these beds are most fully deve- 

 loped near Sandfoot Castle. 



s. Oolite differendy developed in different places. 



/. Brown sands, containing indurated nodules of calcareous sandstone. 



u. Grey clay. 



V. Larger deposit of calcareous grit, containing Gryphaea dilatata. 

 •w. Oxford clay, grey marl, abounding in Gryphcsa dilatata. 

 X. Rubbly and slaty Cornbrash limestones, alternating with clays and marls. 

 y. Slaty and shelly grey and brown limestones, containing Apiocrinites rotundui,, 

 lignite, broken shells, &c. 



