38 ALL ABOARD FOR SUNRISE LANDS. through the split, but examination shows the water has been cutting its channel. There is one theory which will stand till the next one comes along, for science, as the farmer said of his steer, is ‘an uneasy crittur.’ We will suppose the river to be running across the country, its surface not espec- ially broken, when one of those changes may have taken place of which we have evidence, a wrink- ling of the surface through ‘the contracting or shriveling of the earth” The wrinkle may be along one but not high enough to turn the river from its course, which chafes against this little elevation and rubs its way through it. What now if that process goes on, the ‘wrinkle’ rising, but no faster than the water can cut its way? At last, you have a mountain- range going across the country, and a river flowing in a deep mountain-cut or cafion. Prof. Pow- ell says: “¢The mountains were not thrust up as peaks, but a great MARBLE CANON. block was slowly lifted, and from this the mountains were carved by the clouds — patient artists, who take what time may be necessary for their work. We speak of mountains forming clouds about their tops;