Vol. 69.] 



TWO DEEr BORINGS AT CALVERT STATION. 



ThicJcness 



in feet inches. 



■f- Dai-k marly clay, full of Ostrea sowerhyi 

 M. & L. and Ehynchoneila sp. [of the 

 ' concinna ' type] 2 



Grey limestone, somewhat earthy : un- 

 fossiliferous 5 



Dark-grey marl : Pholadomya cf. del- 



, toidea abundant 



I No core seen between 156 feet 6 inches 

 and 181 feet 9 inches. Beds described 

 on the borer's record as soft, dark-grey, 

 sandy shales 25 



Dark-grey shaly limestone 1 



Grey limestone with Ostrea sp 4 



Dark marly band 



Grey limestone 1 



Grey marly clay with a thin band of lime- 

 stone ; clay very fossiliferous. Bliyn- 

 choncllcB of the 'concinna' type and 



Ostrea sowerbyi M. & L. occur in great 

 abundance 2 



Grey limestone, with an Ostrea band 

 near the top 3 



Dark-grey marl 



Grey thinly - bedded limestone, with 

 ^ lignite-fragments 1 



Ron 



sequence. 



59 



S3 I Yellowish oolitic limestone 2 



& I j Sandy limestone, with abundant oolitic 



S 9 1 grains 5 



S ~ I Yellowish oolitic limestone, false-bedded 



£ 1-3 



^ Non-sequence. 



1 § ^Shales, well-laminated, varying in colour 

 ►3 § I from grey to brown [Amaltheus sp. pro- 

 2 g J bably from this horizon], Nuculana sp. 

 g I j Thickness doubtful, owing to displace- 



o •§ I ment of part of the cores, but estimated at 8 



^ §j I Fine loamy sand [not seen] 3 



*« f Shales, well-laminated, sometimes joint}', 

 varying in colour from greenish-grey to 

 brown : septaria in places, a large one 

 at 237 feet. Nuculana sp. ; a Capricorn 



ammonite at about 300 feet about 140 



Fossiliferous limestone, with Capricorn 



j ammonites and lamellibranchs ... 2 



Grey shale [cores not seen] 73 



Pale-grey shales, less fissile than those 

 above; with linear aggregates of pyrite; 



Orbicidoidea aff. holdeni (Tate) 8 



Tough grey limestone, ironshot at the top, 

 with many large angular and smaller 

 rounded fragments of grey shale, sand- 

 stone, etc. ; very fossiliferous: Zeilleria 

 waterhousci (Davidson) and other 

 brachiopods, some lamellibranchs, and 

 a derived fragment of Echioceras 



inicrodiscus (Quenstedt) 2 



\ Dark clay 3 



240 



311 



Depth 

 in feet inches. 



VX 



203 



211 

 214 



354 



356 6 

 430 



438 



440 

 443 



Q. J. G. S. No. 274. 



