Vol. 58.] JURASSIC OF THE SOUTH WALES DIRECT LINE. 127 
The association of the paxillose type of belemnite with the acute 
brevicones is very characteristic of this horizon. 
Rhynchonella aff. Thalia is very common, but usually badly 
preserved ; it is one of the linzata-group, and was kindly determined 
for us by Mr. J. W. D. Marshall. 
VERTICAL SECTION OF THE ARMATUS- AND JAMESONI-BEDS 
WEST OF THE TuNNEL (OLD SopBury). 
Feet, Ins. Feet. 
.! Belemnites spp. 
“oe aes a Bese Taliinia numisnati | wc Relate ds 6 
ular cimestone, | Rhynchonellaaff. lineata } 
(ae Siisliales,...ke8 3 tea caeeen + 6 ) 
Sie PuMeStONE. 2 saveco nese 0 3 
| 3 | Sltallos cane te. measaesesna: 7 3 | 
Thick shale, with | § IDWWAAS SOME) 45 con abr eoncee 0 3 
a few thin lime-{ ‘S$ <¢ Shale, with one thin + 302 
stone-bands. | os band of nodular 
| Bgl nelimestonel. ss, 9 0 
eee imestoneu css sss. O 5) 
Opens Whaler tie. Seika 9 0) 
Thin pyritous limestone and shale f Amm, aff. armatus. | 2 
BY Peak Ry Lat eee | Amm. raricostatus. { 
2. The Lilliput Cutting (south-west of Chipping Sodbury). 
A very small exposure of Lower Lias is seen on the south side of 
the Lilliput cutting, at the western end of the ridge of Carboniferous 
Limestone there cut through. ‘The beds are much disturbed, being, 
with the underlying Cotham Marble, faulted and bent into the form 
of an U. The section is considerably obscured by talus, but the 
following beds can be made out. :— 
Thickness in feet. 
Thinly-bedded limestone, with shaly partings. (Ostrea-Beds.) .. 3 seen. 
ET a] Eats eee oe ee a A et ee ie Ae Pe ee 13 
3. The Lower Lias of Stoke Gifford.' 
The lowest beds of the Lower Lias crop out in the cutting imme- 
diately east of Stoke Gifford. Owing to a very slight westerly dip, 
the greatest total thickness occurs near the western end of the 
cutting; but no beds above the sub-zone of Ammonites torus are 
shown at any point. 
The White Lias. 
The White Lias is represented by a single bed (the ‘Sun-Bed’) 
which directly overlies a bed of very characteristic Cotham Marble. 
In the charaster of the Cotham Marble, and in the reduction of 
the White Lias to a single bed, the development at Stoke Gifford 
is strikingly similar to that west of Sodbury Tunnel already 
described. In this connection, it 1s interesting to notice that, at 
New Clifton (near Bristol), which lies in the same Jurassic area as 
1 This section lies about 3 miles west of the main Sodbury section, near the 
western termination of the line. 
