60 



ME. L. RICHAKDSOtf ON THE EH^TIC OF [Feb. IC)!!, 



Section in Three-Arch Bridge Railway-Cutting. 



O 



Thickness hi feet 

 LOWER C Limestones and clays : seen ) ori 

 LIAS. I abont \ 20 



- § S q C ^^ iriestones w ith marly part- ") 

 '^ o w \ ings, the whole cream- [ 12 



^ *W (_ coloured J 



[1. Position of the Cotham 

 Marble.] 

 w J 2. Shales, greenish - grej r , ") 



marly: 2 to 3 feet J J 



f Limestone, pale greenish- 

 j grey, with arenaceous 

 (_ layers : 12 to 20 inches. 

 L 5^qJ fThin, hard grey layers, with 

 man}- quai'tz-grains and 

 fish - remains, passing 

 down into a hard con- J> 

 glomeratic limestone with I 

 small pebbles of* Carb. | 

 ^ Limestone: 1 to 3 ins. ...J 

 ? 4. Shale, pale-green, marly . 



i - 

 o 



« . 



W Q 

 H W 

 03 22 



'5 a. Shale, darker, marly 



5 b ( Limestone, grev and black, > n 



to7(. st" 1 



8to), 

 14-5 



shal} r 

 Shales, black 



Tea- 

 green 

 Marls. 



Red 

 Marls. 



C Shale, black, earthy, with 



15. < nodules and layers of a 



(. highly pyritic limestone . 



Marls and marlstones, greenish- ") 

 grey, corresponding almost bed f , . 

 for bed with those at Milton C 

 Lane, Wells ) 



Red and variegated marls, with ' 

 a little celestine and salt- 



pseudomorphs : seen 



:. 



inches. 







(~ Chlamys pollux (D'Orb.). 

 | Plagiostoma valoniense (De- 

 0< france), Volsella minima 

 I (Moore own Sow.), Proto- 

 t_ cardia, etc. 



4 Fish- scales. 



C Chlamys valoniensis (Defr.) r 

 u (. coprolites and fish-remains. 





4 8 





LI 



4 



6 



7 



C Chlamys valoniensis, Pro- 

 ) tocardia rhatica (Merian) 

 J Pteria contorta (Portl.) 

 V Ichthyosaurus. 

 C Gyrolepis alberti Ag., Chla 

 \ mys valoniensis. 





11 4 





It should be noticed that Moore doubtfully identified tbe bed that 

 I have numbered 3 with the ' Flinty Bed ' of Beer Oocombe. 



South-east of the railway-cutting, past Lamberts Hill, then 

 round the sinuous outcrop of the Bhgetic to East Compton, and 

 thence to North Wootton, no sections are available. 



The junction of the White Lias proper with the Lower Lias is 

 seen in an interesting section in the tram-line cutting, south 

 of Waterlip Quarry and north-east of Doulting. This section I 

 have described quite recently, and to that description I have 

 nothing to add. 1 



Between the main outcrop of the Rhsetic west of Shepton Mallet 

 and the southern end of the Wedmore inlier is broken ground of 

 very diverse stratal composition. Bold and often quarried knolls, 

 partly ringed round with Dolomitic Conglomerate, are inliers of 



Proc. Geol. Assoc, vol. xxi (1909) pp. 216-17. 



