Through the Grand Canyon from Wyoming to Mexico, with a foreword by Owen Wister;new edition with (72 plates) from photographs by the author and his brother . would showjust how we successfully ran this difficult rapid. Whilegoing over the second section, on the opposite sideof the river, Emery was thrown out of his boat for aninstant when the Edith touched a rock in a twenty-fivemile an hour current, similar to my first upset in theSoap Creek Rapid — the old story: out again; inagain; on again — landing in safety at the end of therapid not one whit the worse for the spill. This rapid marks the
Through the Grand Canyon from Wyoming to Mexico, with a foreword by Owen Wister;new edition with (72 plates) from photographs by the author and his brother . would showjust how we successfully ran this difficult rapid. Whilegoing over the second section, on the opposite sideof the river, Emery was thrown out of his boat for aninstant when the Edith touched a rock in a twenty-fivemile an hour current, similar to my first upset in theSoap Creek Rapid — the old story: out again; inagain; on again — landing in safety at the end of therapid not one whit the worse for the spill. This rapid marks the place where the granite, or ig-neous rock, intrudes, rising at a sharp angle, slopingupward down the stream, reaching the height of 1300 feetabout one mile below. It marks the end of the largedeposit of algonkian. The granite, when it attains itshighest point, is covered with a 200-foot layer ofsedimentary rock called the tonto sandstone. Thetop of this formation is exposed by a plateau from aquarter of a mile to three miles in width, on eitherside of the granite gorge; the same walls which werefound in Marble Canyon rise above this. The temples. SIGNALLING OUR CANYON HOME 211 which are scattered through the canyon — equal inheight, in many cases, to the walls—have their foun-dation on this plateau. These peaks contain the samestratified rock with a uniform thickness whether inpeak or wall, with little displacement and little signof violent uplift, nearly all this canyon being the work oferosion: 5000 feet from the rim to the river; the edgesof six great layers of sedimentary rock laid bare and witha narrow 1300-foot gorge through the igneous rockbelow — the Grand Canyon of Arizona. The granite gorge seemed to us to be the one placeof all others that we had seen on this trip that wouldcause one to hesitate a long time before entering, if noth-ing definite was known of its nature. Another personmight have felt the same way of the canyons we hadpassed, Lodore or Marble
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