It was perhaps the facility with which a pillar of stone or wood can be turned into an image by painting or sculpturing on it eyes, ears, mouth, marks of sex and so on, which led anthropologists of an earlier generation to postulate such a law of development; but facts do not bear it out.
The picturesque effect of this sculpturing by water, wind and fire is greatly enhanced by the brilliant colours along the faces of the hills and ravines - grey, yellow, black and every shade of red and brown.
These regions present magnificent examples of dry erosion by wind-borne sand, which acts as a powerful sand blast etching away the rocks and producing most beautiful sculpturing.
In some cases the foliage is preserved in situ; more often, however, especially in the main stem and larger branches, S.C. /,???_ A the leaves had been shed, leaving behind them their scars and persistent bases, on which the characteristic sculpturing of the Lepidodendroid surface depends.
