Field, laboratory, and library manual in physical geography . Fig. 16. A Terrace, 150 Feet in Height, cut by the Santa Ana River,Southern California Some of the hest orange groves in the world are located on this terrace remaining unchanged? Lakes are an evidence of uncompletedwork or imperfect drainage. What other evidence of imperfectdrainage do you find on this quadrangle ? (Look along Pelicancreek, which flows into Yellowstone lake, and along Sloughcreek, in the extreme northern part of the quadrangle.) Ifdraining this region were the task of the Yellowstone river,would you say it has much
Field, laboratory, and library manual in physical geography . Fig. 16. A Terrace, 150 Feet in Height, cut by the Santa Ana River,Southern California Some of the hest orange groves in the world are located on this terrace remaining unchanged? Lakes are an evidence of uncompletedwork or imperfect drainage. What other evidence of imperfectdrainage do you find on this quadrangle ? (Look along Pelicancreek, which flows into Yellowstone lake, and along Sloughcreek, in the extreme northern part of the quadrangle.) Ifdraining this region were the task of the Yellowstone river,would you say it has much or little yet to do?. 116 A REGION IN MATURITY 117 The region represented on the large map 2 is a great is being cut by canyons into smaller plateaus. Determineand record the average elevation of each of the following pla-teaus (see large map): (1) Buffalo plateau ; (2) Mirror plateau ;(3) Two Ocean plateau; (4) Pitchstone plateau ; (5) Madisonplateau ; (6) Central plateau. Which is highest ? Do you detectany slope away from this plateau? If so, in what direction?Observe the picture of the canyon of the Yellowstone. (SeeFig. 17.) The background represents one of these the sky line. If one were standing on this plateau,the higher portions would appear as mere undulations of thesurface. Distant canyons would not be visible. Why ? Whateffects will continued erosion probably have upon the generalappearance of this plateau? Why is it appropriate to say that this stream and this regionare in their youth ? EXERCISE XXXIX A REGION IN MATURITY Part I Locate Charleston (), giving th
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