wealden and oolite. 
103 
estuary. The Wealden is a series of local 
beds, and in a general account of geological 
periods it may be ranked with those next to 
be considered. 
These strata have their characteristic 
flora, but they do not offer to the botanist 
any of the wonders which the iguanodon 
and gigantic lizards of this formation dis¬ 
play to the Zoologist. 
“ On rifted rocks the dragon's late abodes, 
The green reed trembles, and the bulrush nods. 
Waste sandy valleys, once perplex’d with thorn. 
The spiry fir and shapely box adorn: 
To leafless shrubs the flowery palms succeed. 
And odorous myrtle to the noisome weed.” 
4. Oolite and Lias ,—Before arriving at 
Bath, an improvement in architecture will 
be manifested in the appearance of the stone 
buildings which succeed to the brick erec¬ 
tions of the clay and chalk country. The 
yellow Oolite rocks, and the blue Lias be¬ 
neath them, are associated in a band running 
pfrom Devonshire to the eastern coast of 
Yorkshire, the Lias being the lowest and 
westernmost. 
