748 PROF. REYNOLDS AND MR. VAUGHAN ON THE  [Novy. 1902, 
the following fossils: Pecten lens, P. annulatus, P. rigidus, P. vagans, 
Ostrea Sowerbyi, Rhynchonella (mutation of Rh. concinna). 
The lowest beds of the Forest Marble seen overlying the Great 
Oolite immediately east of Sodbury Tunnel are :— 
Thickness in feet. 
2. Shale, with limestone-band 2 feet thick in places............... 
1. Shale, which, when followed eastward, develops a prominent 
band of shelly limestone 1 to 3 feet thick ..................... 18 
Great Ooritp. Compact, false-bedded, shelly oolite. 
The above series is cut off by a fault with a downthrow to 
the east, at a point due south of Badminton Farm. East of this 
fault shales are seen, and at the point where the road between 
Badminton and Acton Turville crosses the line, a limestone-band is 
seen coming on below; this may be the upper of the two bands 
which were cut off by the fault. Embankments or shallow cut- 
tings, showing no continuous series of exposures, extend from this 
point until the big cutting due south of Alderton is reached. 
Immediately west of Alderton Tunnel there is a section of 
Forest Marble, showing predominating clays or shales and subsidiary 
limestones, as follows :— 
Feet Inches. 
8; Clay or shallot i. Sit sie hee ane eee 15 0 
7. Td persistent limestone .5...Yoagcsee ws nee ee ®) 6 
G. Blue olay eS cee, cease ac tine tae ae 30 0 
5. Hard: blue: ealitielimestones:.....toves-e ee eee O 6 
As Glen vO eset eee ne taming ee ee 3 ) 
3. Hard, blue oalitie: limestone: 22.2056 S25 nee eee O 9 
2. WlUG Sandy Biay anse cece nee sadenich eens tere yee eee 2 3 
1. Compact oolitic limestone, weathering yellow, to base 
OF ROCHON 9:55. de cieccntece ace acon aceaated Saeemen crue 8 0 
60 0 
At the eastern end ot Alderton Tunnel there is a fine section 
through the Forest Marble, which is traversed by three faults with 
sight downthrows to the east. The section immediately east of the 
tunnel is as follows :— 
Thickness in fect. 
3. Thinly-bedded limestone, false-bedded at the base... 10 
2. Blue clay and shale, with a hard band near the top 
and a more persistent hard band near the base ... 20 
1. Hard limestone to base Of section). :.7..:tmeata. ree 10 
The above section shows predominating limestones and subsidiary 
clays. The lowest beds some 200 yards tothe east pass into shale ; 
the limestone at the top also thins out eastward, and is replaced 
by shale. 
The cutting which commences east of Alderton Tunnel extends 
almost continuously as far as Bradfield Farm, and affords a splendid 
section of the Forest Marble. This shows the usual great lateral 
variability and frequent false-bedding. Several small faults cut 
through the beds to the east of the Fosseway, but the beds as 4 
rule show little disturbance. In the neighbourhood of the Fosse- 
way and Furleaze Farm they are approximately horizontal ; when, 
