Forest physiography; physiography of the United States and principles of soils in relation to forestry . Fig. ij$. — Wall at head of cirque, upper end of a tributary of West Tensleep Creek, Bighorn View from above rim, showing old rounded surface. B. View from below rim, showing granitewalls nearly looo feet high. (Blackwelder, U. S. Geol. Surv.)352 ROCKY MOUNTAINS. II 353 During both the advance and the retreat of the ice the number ofseparate glaciers was greater than during the time of maximum glacia-tion, for the ice was melted out of the lower glacial troughs, while itstill l
Forest physiography; physiography of the United States and principles of soils in relation to forestry . Fig. ij$. — Wall at head of cirque, upper end of a tributary of West Tensleep Creek, Bighorn View from above rim, showing old rounded surface. B. View from below rim, showing granitewalls nearly looo feet high. (Blackwelder, U. S. Geol. Surv.)352 ROCKY MOUNTAINS. II 353 During both the advance and the retreat of the ice the number ofseparate glaciers was greater than during the time of maximum glacia-tion, for the ice was melted out of the lower glacial troughs, while itstill lingered in the separate tributary valleys. The glaciers on the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
