PL hl. 
% 1 . 
Lower 
Purbeck 
beds. 
ßurrstone. 
Dirt bcd, 
black mould, 
and pebbles. 
Calcareous state 
of fresh water 
forination. 
Temporary 
dry land. 
Section of the Dirt-bed in the Isle of Port Land, shewing the subterranean vernahm 
of an ancient Forest. De la Peche. 
Fig. 2. 
Circular ridges and depressiuns un the Burr&lone, in the 1. of Portland, round an erect 
Uump ofa tree,fourfeet high. Sketched by Professor Henslozo, 1832. 
Fig. 3. 
Lower Purbeck beds 
composed of calcare- 
ous slate of freshuater 
forination . 
Soft burrstone. 
Ancient forest in the 
dirt bed. 
Portland stone of 
marine formatton. 
Section of the Clijfeast of Lulworth Cove, Dorset. Buckland. 
