200 CARBONIFEROUS VOLCANIC ROCKS OF SOMERSET 
ft. in. 
7. Somewhat nodular limestone . . . .26 
6. Fine brown ash often calcareous, with occasional 
fragments of limestone and chert . . . 27 0 
5. Reddish impure limestone . . . .46 
4. Brown decomposed ash with nodular calcareous 
bands . . . . . . . .46 
3. Argillaceous limestone . . . . .05 
2. Brown decomposed ash with nodular calcareous 
bands . . . . . . . . 13 0 
1. Limestone with chert and corals to base of section . 
80 9 
Fourth Exposure . — Still further to the east, in a little 
cove just south of the point where the coast line bends due 
south, is a small and much attenuated representation of 
the volcanic series. This is not described by Sir A. Geikie 
and Mr. Strahan. The section is as follows : — 
5. Thin bedded limestone dipping at 40°S, 10 E. to top of 
section ........ 
4. Shaly beds ....... 
3. Fine red ashy limestone ...... 
2. Fairly coarse ash ....... 
(gap, no exposures.) 
1. Reddish limestone to base of section . . r . 
ft. in. 
2 6 
2 0 
2 0 
The most interesting points about these sections are (1) 
that the lava is only met with in the most westerly ex- 
posure, and (2) that the whole series becomes progressively 
thinner when followed to the east, showing that the centre 
of volcanic activity probably lay further to the west. 
(2) Spring or Birnbeck Cove, Weston-super-Mare. 
Sir A. Geikie and Mr. Strahan give a full description of 
this section in the Summary of Progress. Their account 
is as follows : — 
“ At Spring Cove, immediately to -the west of the town 
of Weston, a cliff between the high road and the sea exposes 
the succession of rocks given in the subjoined table in 
descending order : — 
