Page:The Formation of Vegetable Mould through the Action of Worms (1881).djvu/244



THE ACTION OF WORMS IN THE DENUDATION OF THE LAND.

one doubts that our world at one time consisted of crystalline rocks, and that it is to their disintegration through the action of air, water, changes of temperature, rivers, waves of the sea, earthquakes and volcanic outbursts, that we owe our sedimentary formations. These after being consolidated and sometimes