EXPLANATION OF PLATE 1. 
11 
f. 8. Basaltiform products of Modern Volcanos. 
g. Trachyte forming Dykes, 
* g. 1. Trachyte forming overlying Domes. (PuydeDome.) 
h. 1. h. 2. Lava of extinct Volcanos, forming undisturbed 
Cones. (Auvergne.) 
i. — i. 5. Lava, Scorim, and Craters of active Volcanos. 
(i. 1. — i. 4. Etna. 1 — 5. Stromboli.) 
k. — k. 24. Metalliferous Veins. 
k. 15'. Lateral expansions of Veins into metalliferous 
cavities, called by the Miners Pipe Veins, or Flats. 
— 1- 7. Faults, or fractures and dislocations of the strata. 
The continuity of stratified Rocks is always inter- 
rupted, and their level more or less changed on the 
opposite sides of a fault. 
It is unnecessary here to give detailed descriptions of the 
28 divisions of the Stratified Rocks represented in our Sec- 
tion. Their usual Order of Succession and Names are ex- 
pressed in their respective places, and detailed descriptions 
of their several characters may be found in all good Trea- 
tises on Geology. 
The leading Groups of Formations are united by colours, 
marking their separation from the adjacent groups; and the 
same colours are repeated, in the headings above the figures 
of Plants and Animals, that characterize the several series 
of Formations, to shew the extent of the strata over which 
the Organic Remains of each Group are respectively dis- 
tributed. 
The Formations of Peat Bogs and Calcareous Tufa are 
of too local a nature to be included in the series of stratified 
Rocks represented in this Section; although they some- 
times operate locally to a considerable extent, in adding 
peimanent and solid matter to the surface of the Globe. 
