In the neighbourhood of Nottingham, and other places in the Midlands, barytes forms a cementing material in the Triassic sandstones; amber-coloured crystals of the same mineral are found in the fuller's earth at Nutfield in Surrey; and the septarian nodules in London Clay contain crystals of barytes as well as of calcite.
For two years the movement spread rapidly throughout the north of England, and in 1654 more than sixty ministers went to Norwich, London, Bristol, the Midlands, Wales and other parts.
The trees and plants characteristic of each zone are not always confined to that zone, but in several instances, when common to the coast belt and the midlands, their character alters according to the elevation of the land.
As a rule flowers common to all zones are on the coast smaller and with paler colours than they are in the midlands.
There is but one cactus indigenous to Natal; it is found hanging from perpendicular rocks in the midlands.
