16 



MR. L. RICHARDSON ON THE RH^ITIC OF [Feb. IC)!!, 



[Blue Anchor Point.] 



Thickness in feet indies. 



I 4.. 



-(IK 



(2) 



1(3) 



Shales, dark-brown 



( Cotham-Marble equivalent; 1 



I to 3 inches 



Shales, greenish-grey, calcareous ... 

 C Limestone, pale - brown, blue - 



I centred 



Shales, greenish-grey, with thin^ 

 layers of a pale-green limestone 

 full of shell-debris. The deposit 

 from the base up to 8 inches 

 therefrom (and of a brown tint) is 

 closely packed with thin limestone- 

 layers, so as to constitute in places 

 a compact stratum, which is sepa- 

 rated from the underlying bed by 



more shaly matter J 



fLimestone, pale greenish-grey, on) 

 I the whole a conspicuous and mas- | 

 sive bed, including at the base a )>1 

 bluish-grey limestone 3 inches | 



thick : 14 to 16 inches J 



Marl, brown, clayey : 2 to 3 inches. 



>2 



Ostracods at the top. 



rShales, black, with thin brown ") ft 



I seams ) 



(1) -i Conspicuous brown shelly seam and ) ~ 



I ' beef ' ) 



I C Shales, black, very fossil if erous 7 1 

 ( at the base : 10 to 16 inches ... ) 

 Limestone, blackish, pyritic, with" 

 a 1^-inch layer of ' beef ' on the 

 top. Much black shale is mixed 

 with the limestone. Very pyritic 

 in places, and when decomposed is 



^ of a rich reddish -brown _ 



q n ( Shales, black, laminated : 18 inches ) -, 

 ^'l to 2 feet j 1 



(2) 



55. 1 



6H 



Cardmm-cloacinum Bed. Lime-^1 

 stones, thin, very dark-grej r , with j 

 shale - partings, associated with I 

 nodules of pale-grey hard lime- f 

 stone — the Cardium-cloacinum \ 

 Bed proper J 



Shales, black, with thin limestone- ~) 

 layers intercalated among them ( „ 

 near the base and containing many f 

 fossils J 



Limestone, blackish, mixed with).-, 

 shale, and extremely fossiliferous . ) 



Shales, black 



C Shales, earthy, black, calcareous, 

 ■< bound together by ' beef ' so as 

 (. to resemble a hard bed 



Shales, black 



C ' Beef,' often resting upon a hard 

 (_ limestone 



Shales, black 



Limestone, grey-black, somewhat 

 shaly 



Shales, black, thinly laminated 



C Limestone, impure, shaly, full of 

 ( shells 



Shales, black, thinly laminated ... 



}* 



C Pteria contorta (Portlock), 

 , j Chlamys valoniensis (De- 

 1 f ranee), Dimyodon intus- 

 C striatus (Emmerich). 



o C Chlamys valoniensis, Di- 

 \ myodon intus-striatus. 



fin the top portion of this 



deposit Chlamys valoni- 



6 <j ensis and Pteria contorta 



j are common ; Placunopsis 



[_ alpina (Winkler). 



CCardium cloacinum Quen- 



stedt, Protocardia rhce- 



6 ■{ tica (Merian), Pteria con- 



I torta, Placunopsis alpina, 



t_ Ostrea sp. 



Pteria contorta, Chlamys 

 valoniensis, Placunopsis 

 alpina (large), Pleuro- 

 phorus elongatus Moore, 

 I Dimyodon intus-striatus, 

 | Protocardia rhcetica, Vol- 

 \ \_ sella minuta (Goldfuss). 

 C Chlamys valoniensis and 

 < indeterminable shell-frag- 

 (. ments. 

 Pteria contorta, common. 



Pleurophorus elongatus, 

 Chlamys valoniensis, Pla- 

 J cunopsis alpina, Nucu- 

 lana cf. titei (Moore), 

 Actceonina, fusiformis 

 (Moore), A. ovrformis 

 (Moore), A.ovalis\(M.oove), 



2 1 



