34 



ME. I. RICHARDSON ON THE RH^TIC OF [Feb. I9U. 



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2. 



[Dunball.] Thickness in 

 Shales, dark green , clayey 



fCotham-Marble equivalent. 

 1. < Limestone in intermittent len- 



(. ticular masses : to 2 inches 



C Shales, calcareous, pale greyish- 



X green, weathering white 



C Limestone, hard, greenish-grey, 



X crystalline : 1 to 2 inches 



/,x C Shales, greenish-grey, thickly lami- 

 ^ ' \ nated, calcareous : 7 to 9 inches... 



r Limestone, hard, greenish-grey, 

 (2W P ass * n g m ^° a fissile limestone 

 ^ 'l with quartz-grains in the 



V. layer : 6 to 10 inches 



feet 

 



inches. 

 2 



top 



/on ( Shales, black and brown, ferru- 

 -^ ' \ ginous about 



C [2 feet 4 inches at the 

 X Cement Works.] 

 ( [9 inches, and in three beds 

 X with shale-partings.] 



[1 foot.] 



f Pleurophorus angulatus 

 ) Moore (teste Bristow & 

 j Etheridge). 

 C [4 to 10 inches.] 



1 6 [4 to 6 inches.] 



(1) Shales, black 3 



C Limestone, earthy, very ferruginous, 



^ X with ' beet 



and selenite 



^ (3) Shales, black : 22 to 26 inches 2 



f Limestone, hard, grey, irregular,"") 

 slightly pyritic, with some ad- 

 5 6. «{ mixture of shale : 1- to 2-inch f 

 j layer of ' beef ' on the top. Lime- 



to 8 inches 



1^ stone, 



( Shales, black, weathering brown, > , 



X selenitic: 12 to 14 inches ) 



f Limestone, grey, very earthy," 



3 shelly, slightly pyritic, with <, 



j f-inch layer of 'beef below: 



L 2 to 4 inches 



(1) Shales, black, laminated 2 



/„\ ( Shales, indurated, veiy selenitic, ") ~ 



^ ' X simulating a hard band J 



/q\ (Shales, black, thinly laminated, "> i 



^ ' X selenitic ) 



fLimestone, massive, greyish-brown," 

 somewhat nodular (of septarian 

 formation), in places siliceous, 

 traversed by ramifying fissures 

 filled with calcite. This bed 

 much resembles the Bone- Bed )>0 

 at St. Mary's Well Bay, Sully. 

 The topmost 2 inches comprise 

 indurated earthy and selenitic 

 shale with impure limestone: 

 9 to 11 inches , 



10. Shales, black, thinly laminated ... 



f Limestone, grey and black, earthy ; " 

 . , 3 much selenite and ' beef ' on the . , 

 j under side. Passes into a very 

 V. fossiliferous bone-bed 



C Shales, black, prominently lami-"\ 

 1?) j nated, but not quite so much I „ 



j at the base. Very selenitic at t 



L the top J 



1 „ C Thin sandstone-layers, mixed with ~) ~ 



X a preponderant amount of shale... ) 

 n . C Shales, black, selenitic (in minute \ , 

 14 X crystals)... J 1 



SPteria contorta (Port- 

 lock), Isocyprina ewaldi 

 (Bornemann). 

 Fish-scales, shell-debris, 

 Chlamys valoniensis 

 (Defiance) ,Protocardia 

 rhtetica (Merian). 



3 Chlamys valoniensis, etc. 



fThe 'Flinty Bed' of 

 10 ■< Moore's Hatch-Beau - 

 (. champ section. 



C l Pullastra and Axinus 

 \ elongatus ' (teste Bris- 

 (_ tow & Etheridge). 

 fAcrodus minimus Ag., 

 j Gyrolepis alberti Ag. r 

 J Saurichthys acumina- 

 ' tus Ag., Hybodus minor 

 Ag., Lepidotus ? (teeth), 

 saurian ribs, coprolites. 



, , C Pteria contorta, Proto- 

 X cardia rhcetica. 



3 Fish-scales. 

 8 



