252 



Dr. FiTTON on the Strata below the Chalk. 



5. A bed, likewise very irregular, consisting of — 



a. Brownish clay, at the upper part. 



b. Cavernous concretions or crusts of carbonate of lime, in the form of irre- 

 gular flakes ; which in some places have a deceptive appearance of or- 

 ganic structure. This bed accommodates itself to the inequalities in the 

 surface, both of 4 above and of 5 below it ; and seems to be a mass of 

 loose loamy clay, shot through by stalagmitic carbonate of lime 



6. A bed much decomposed, and very unequal in thickness: apparently consist- 

 ing of soft, calciferous clay, with some portions of firmer limestone 



All the preceding beds seem to be above those of the Wockley Quarry. 



7. (Apparently the same with 2. and 3. of Wockley.) Irregular portions of" 

 limestone, very indistinct from decomposition ; sometimes wholly wanting ; 

 sometimes in the form of thin slaty beds waving over the inequalities of the 

 clay (8.) below . . , 1 ft. to 1 ft. 6 in. 



The whole thickness from 4ft. to 7ft. inclusive is about 



8. Tough clay, (seems to be the same with 4. of Wockley). 

 Wockley. — 



Grassy surface. 



1 . Ferruginous loam and sand, filling the irregularities in the top of 2 6 in. to 



2. Compact limestone, much decomposed, but in the fresher pieces mottled, 

 grey and bluish. At the bottom this bed is divisible into flakes or thin strata, 

 curved, or waving ; very like the lower part of the " slate " of Portland, 

 and the fissile beds above the Portland stone at Bacon Hall, (p. 223.) (Quce. 

 the " Soft Burr," or " Bacon-ledge ") 1 ft. 6 in. to 2 ft. 



3. Decomposed whitish, fissile limestone; passing at the lowest part into 4., 1 

 and very nearly resembling the " Cap " at Bacon Hall about J 



4. (8. of Chicksgrove Quarry.) Tough dark clay, in some places very like 

 Fuller's-earth : seems to represent one of the " dirt beds" of Portland and the 

 coast near Lulworth, but is more uniform, and does not contain fragments of 

 stone 



5. (9. of Chicksgrove.) Fissile stone and clay. 



a. Hard stone 



b. Thin slaty stone, in some places sandy, abounding in casts of Cypris, and 

 in Cyclas elongata,Pl. XXI. fig. 9. This bed very much resembles the 

 decomposing "Cap" of Upway (p. 223.) and may perhaps correspond to 

 the " Jsh " of Portland (p. 220.) 



The beds of this part of the section, at Chicksgrove, include also a 

 minute spiral univalve. They are intersected by veins of stalactitie car- 

 bonate of lime, like those in the " Cap", &c., of Portland. 



c. Fissile calcareous matter, in beds of unequal thickness, curved at the 

 lower part over the masses of d. ; precisely like the bottom of the 

 " Cap " at Bacon Hall, (p. 223.) 



d. Irregular concretional masses of black flint, rugged without when de- 

 tached ; not in themselves distinguishable from chalk flints 



6. (10. of the Chicksgrove section.) Fissile, somewhat gritty limestone ; at top 

 enveloping the flinty masses 5.d. ; below adhering to 7. This bed at the upper 

 part contains casts of Cypris in great numbers. The proprietor of Chicks- 

 grove Quarry told me that fishes, like those of Ladydown, were found in this 

 part of the series, both there and at Wockley; but the specimens which I 

 could obtain were much smaller than those of that place ." 



Ft. In. Ft. In. 



^1 3 



6 



1 



1 9 



2 6 



5 



H 3 



10 



