CHAPTER XIII.
A Canyon through Marble--Multitudinous Rapids--Running the Sockdologer--A Difficult Portage, Rising Water, and a Trap--The Dean Upside Down--A Close Shave--Whirlpools and Fountains--The Kanab Canyon and the End of the Voyage.
By referring to the relief map opposite page 41, the mouth of the Paria is seen a trifle more than half-way up the right-hand side.

The walls of Glen Canyon here recede from the river and become on the south the Echo Cliffs, taking the name from the Echo Peaks which form their beginning, and on the north the Vermilion Cliffs, so called by Powell because of their bright red colour.

The latter, and the canyon of the Paria, make the edges of the great mesa called the Paria Plateau, and, running on north to the very head of the Kaibab uplift, strike off south-westerly to near Pipe Spring, where they turn and run in a north-west direction to the Virgen River.

Between the receding lines of these cliffs, at the Paria, is practically the head of the Grand Canyon.

The river at once begins an attack on the underlying strata, and the resulting canyon, while at first not more than two hundred feet deep, rapidly increases this depth, as the strata run up and the river runs down.