abruptly on the west by the Grand Wash Cliffs, which is a high escarpment caused by a “fault” (as the geologist calls it), that is, the strata of sandstone and limestone are broken off, and to the west of the fracture they are dropped down several thousand feet, so that standing upon the edge of the plateau above the Grand Wash Cliffs you may look off to the west over a vast region of desert from which low volcanic mountains rise that seem like purple mounds in sand-clad lands.
On the cast the great plateau breaks down in a very irregular way into the valley of the Little Colorado, and where the railroad ascends the plateau from the east it passes over picturesque canyons that run down into the Little Colorado. On the south the plateau is merged into the great system of mountains that stand in Southern Arizona. Where the plateau ends and the mountains begin is not a well-defined line. The plateau through which the Grand Canyon is cut is a region of great scenic interest. Its surface is from six to more than eight thousand feet above the level of the sea. The Grand Plateau is composed of many subsidiary plateaus, each one having its own peculiar and interesting feature.
The Kaibab Plateau, to the northeast of the Grand Canyon, is covered with a pine forest which is intercepted by a few meadows with here and there a pond or lakelet, It is the home of deer and bear.
To the west is the Shinumo Plateau in which the Shinumo Canyon is carved; and on the cliffs of this canyon and in the narrow valley along its course the Shinumo ruins are found—the reliccs of a prehistoric race.
To the west of the Shinumo Plateau is the Kanab Plateau, with ruins scattered oyer it, and on its northern border the beautiful Mormon town of Kanab is found, and the canyon of Kanab Creck separates the Shinumo Plateau from the Kanab Plateau. It begins as a shallow gorge and gradually increases in depth until it reaches the Colorado River itself, at a depth of more than 4,000 feet below the surface. Vast amphitheaters are found in its walls and titanic pinnacles rise from its depths. One Christmas day I waded up this creek. It was one of the most delightful walks of my life, from a land of flowers to a land of snow.
To the west of the Kanab Plateau are the Uinkaret Mountains—an immense group of volcanic cones upon a plateau. Some of these cones stand very near the brink of the Grand Canyon and from one of them a flood of basalt was poured into the canyon itself. Not long ago geologically, but rather long when reckoned in years of human history, this flood of lava rolled down the canyon for more than fifty miles, filling it to the depth of two or three hundred feet and diverting the course of the river against one or the other of its banks. Many of the cones are of red cinder, while sometimes the lava is piled up into huge mountains which are covered with forest. To the west of the Uinkaret Mountains spreads the great Shiwits Plateau, crowned by Mount Dellenbough,
Past the south end of these plateaus runs the Colorado River; southward through Marble Canyon and in the Grand Canyon, then northwestward past the Kaibab and Shinumo Canyon, then southwestward past the Kanab Plateau, Uinkaret Mountains to the southernmost point of the Shiwits Plateau, and then northwestward to the Grand Wash Cliffs. Its distance in this course is little more than 300 miles—but the 300 miles of river are set on every side with cliffs, buttes, towers, pinnacles, amphitheaters, caves, and terraces, exquisitely storm-carved and painted in an endless variety of colors.
The plateau to the south of the Grand Canyon, which we need not describe in parts, is largely covered with a gigantic forest. There are many volcanic14
