146 PROFS. LLOYD MORGAN AND REYNOLDS ON THE [^ la }" I9O4, 



from Milton to Kewstoke. A cottager, who was digging in the 

 garden, pointed out a strip running across the field where, he said, 

 all the stones turned up in digging were of this kind. Another 

 man in 1902 made a similar statement. From this field we have 

 ourselves collected many fragments of lava, and a few of a brecciated 

 rock. Moreover, in 1894, at a spot 150 yards down the track 

 leading to Kewstoke, one of us observed a small excavation in which 

 unmistakable volcanic ash was seen in situ. This exposure was 

 shown at the time to Mr. A. C. Pass, then Secretary of the 

 Geological Section of the Bristol Naturalists' Society, who was 

 satisfied as to the nature of the rock. Unfortunately, when we 

 visited the spot, in 1902, we found that the excavation had 

 been walled in, stone-lined, and converted into a small pond. A 

 note made in 1894 is here transcribed : — 



' Volcanic a9li in field [near track] leading down to Kewstoke Steps. Soft, 

 friable, reddish beds, seemingly greener when not exposed (that is, when dug into 

 with the hammer). Numerous vesicular lapilli up to half an inch in diameter.' 



In 19013, round a small pond just above the upper extremity of 

 Kewstoke Steps, we found abundant fragments of lava (? lapilli) in 

 a red, earthy, surface-material. Farther eastward we have found no 

 trace of lavas or ashes. 



(4) At Uphill. 



The relations of the amygdaloidal basalt or dolerite to the lime- 

 stone are not well seen here. The ground is much faulted. There 

 is, in our opinion, nothing to enable us to decide whether the igneous 

 rock is a sill or a contemporaneous lava-flow. Xor have we been 

 able to find in the limestones, either above or below, any traces of 

 ash or lapilli. As will be seen, however, under the next heading 

 (p. 150), the igneous rock occupies exactly the same position in 

 the stratigraphical series as that which the volcanic rocks occupy 

 in other localities. 



(5) In Goblin Combe. 



The Carboniferous Limestone of this upland area, lying north of 

 Wrington, forms an anticline or dome. The volcanic rocks occur 

 in two patches, the more westerly being about a third of a mile 

 south of Warren House, the more easterly about half a mile south- 

 east of this house. Sir Archibald Geikie & Mr. Strahan suggest that 

 the two exposures form parts of the same volcanic series, repeated 

 on the two sides of the anticline. In this, as we shall see, they are 

 probably correct. 



(a) In the more westerly exposure a much-weathered and highly - 

 amygdaloidal olivine-basalt is seen in situ, although it seems to 

 have escaped the notice of Mr. Strahan, who observed only scattered 



