Forest physiography; physiography of the United States and principles of soils in relation to forestry . Fig. 129. — Mount Wilson group in background. Looking down Howard Creek from south of Ophir Pass. of the dome were not covered with volcanic material and the conse-quent drainage developed on these slopes was not affected by volcanicaction. The northern slopes of the domes, on the other hand, wereaffected by volcanic outpourings and the drainage greatly the last great eruptions the streams proceeded to dissect thesurface deeply. The consequence of further upHft of the region
Forest physiography; physiography of the United States and principles of soils in relation to forestry . Fig. 129. — Mount Wilson group in background. Looking down Howard Creek from south of Ophir Pass. of the dome were not covered with volcanic material and the conse-quent drainage developed on these slopes was not affected by volcanicaction. The northern slopes of the domes, on the other hand, wereaffected by volcanic outpourings and the drainage greatly the last great eruptions the streams proceeded to dissect thesurface deeply. The consequence of further upHft of the region and resulting deep dissection has beenthe formation of a confusing variety of slopes in intimate relation to the detailed geologicstructure. Within short distances of each other one may find (i) ancient granites, (2) sedi-mentaries of more recent origin, (3) Tertiary conglomerates, and (4) more recent volcanicaccumulations. The development of slopes upon these varied rocks has naturally been verycomplex and few generalizations may be applied to individual mountains or to the group as
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
