22 



MR. L. RICHARDSON ON THE RH^LTIC OF [Feb. I9II. 



ThicTcness in feet incites. 



3. 



[St. Audeie's Sup.] 



["Limestone, yellowish exte-^) 

 rior, grey interior. The I 

 top is fairly even ; but the | 

 lower portion is rubbly and ! ~ 

 shelly, containing nodular f 

 masses with pitted surfaces, 

 and has a most uneven 



1^ base-line 



f Shale, bluish-grey, indu- 

 ■< rated and calcareous, espe- 



(. cially at the base 



(Limestone, grey, earthy, 

 X with a slight bluish tinge. 

 Shale, bluish-grey, earthy . 

 f Limestone, hard, blue-grey, 

 ) very slightly pyritic. Of- 

 1 ten divides, and in places 

 L dies out. 1 to 4 inches ... 

 C Limestone, hard, grey, con- 

 ) choidal fracture, slightly 

 j pyritic in places. Calcite 

 L crystals. to 3 inches ... 



(1) Shale, bluish-grey 



C Limestone, similar to 7. 



(2) 3 Where 7 is developed 8 (2) 

 ^ j is not, and vice versa. to 



L 3 inches 



lJ3) Shale-parting 



C Limestone, bluish-grey with ~) 

 < darker parallel streaks and > 



(. conchoidal fracture ) 



Shale-parting 



Limestone, average 



[Position of Cot ham 

 Marble, but not noticed 

 by me at this locality.] 

 ("Shales, greenish-grey, lam- 

 inated, calcareous, with a 

 few thin, greenish-grey, 

 micaceous (white) sand- 

 stone-layers in the lower ] 



_ half J 



C Limestone, massive bed, 

 j pale greenish-grey, bluish- 

 1 grey inside, fissile, passing 

 L down into 

 C Shales, greenish-grey, with "J 



X thin sandstone-layers j 



Limestone, similar to 3 ... 



C Shales, pale greenish-grey, "j 



"" X with thin sandstone-layers j 



7 C Limestone, hard, greenish- ) 



' X g r ey, usually present here ) 



["Sandstone, several hard^ 



j layers of greenish-grej' j 



>* 



r 



(i) 



(2) 



(3) 



j immediately underlying 



' I 4(3) J, and mixed with a 



I subordinate amount of | 



(^ shale (see p. 25) J 



M 



The upper bed has on its sur- 

 face Plagiostoma valoniense 

 (Defrance), Dimyodon intus- 

 striatus (Emmerich). In the 

 rubbly portion Plagiostoma 

 valoniense, Protocardia, an 

 echinoid-radiole, and ostracoda 

 — the last, common. 



11 



Qi C Shells rare, but a few specimens 

 2 X of Vol sella were noticed. 



2 



Ok 



2 



Ok 



. ( ' Cotham Marble ' of Bristow 

 4 X &Etheridge. 



0* 

 3i 



ft ( Ostracoda and a few fish- scales 

 X at the very top. 



1 4 Ripple-marked. 



Protocardia (?) and fish- remains 

 in the layer at the base. 



f The lowest hard band contains 

 10 < many shell-fragments, includ- 

 (. ing Cardium cloacinum Qu. 



