EXPLANATION OF THE PLATES. 



PLATE XXXV. 



Fig. 1. represents the junction of the doloraitic conglomerate and old red sandstone 

 on the left bank of the Avon opposite Sea-mills. 



Fig. 2. represents the junction of the inferior oolite and mountain limestone, between 

 Mells and Frorae. 



PLATE XXXVL 



Figs. 1 & 2. are sections of the pits marked A. B. and C, in the ground plan of 

 Goodeave's colliery near Frome, drawn in the figure at the top of the plate. 



PLATE XXX Vn. 



Fig. 1. represents a section of Aust cliff on the Severn, drawn along the line of the 

 drift of the strata. 



Figs. 2 & 3. are enlarged representations of the faults marked 1 and 2 in fig. 1. 



Fig. 4. is a section of Aust cliff, drawn along the line of the dip of the strata. 



PLATE XXXVIIL 



Is a geological Map of the coal basins of Bristol and the Forest of Dean, and of the 

 country bordering upon them. 



PLATE XXXIX. 



Map, Sketch, and Sections, in illustration of Mr. Weaver's paper on part of Glouces- 

 tershire and Somersetshire : pp. 318 — 368. 

 Fig. 1. Geological Map of the environs of Tortworth. 



Fig. 2. A sketch of the north-western part of Cullimore's trap quarry : p. 334. 



1. Stratified beds of sandstone, clay, marl, and limestone. 2. A mass of trap 

 three feet thick. 3. A layer of sandstone, slate-clay, and other substances. 

 4. Trap four feet thick. 5. A layer analogous to No. 3. 6. Continuous trap. 



Section 1. — On the line A B of the map. 



Section 2. — On the line C D of the map. 



Section 3. — On the line E F of the map. 



Section 4. — From the Forest of Dean to the east of Huntley in Gloucestershire : p. 354. 



