Forest physiography; physiography of the United States and principles of soils in relation to forestry . msin succession and causedthe formation of lakes atthe points of junction withthe main stream. In sim-ilar fashion the tributariesthat were freed by thedecay and retreat of theraft material along thefront of the raft againdischarged in the normalway and proceeded to dis-sect the deposits that hadbeen accumulated on thefloor of the temporary lakeat their mouths. Since the removal of the raftsfrom the Red River the water hasgradually resumed its old 1873 to 1892 the river hadlowere
Forest physiography; physiography of the United States and principles of soils in relation to forestry . msin succession and causedthe formation of lakes atthe points of junction withthe main stream. In sim-ilar fashion the tributariesthat were freed by thedecay and retreat of theraft material along thefront of the raft againdischarged in the normalway and proceeded to dis-sect the deposits that hadbeen accumulated on thefloor of the temporary lakeat their mouths. Since the removal of the raftsfrom the Red River the water hasgradually resumed its old 1873 to 1892 the river hadlowered its bed about 15 feet at apoint above Shreveport; the lakeareas are rapidly draining and theextensive lake system along thecourse of the Red River shown on most maps is practically nonexistent. The continuance ofsome of the lakes and the occurrence of rapids and small falls in some of the tributaries are due tothe drainage deflections that resulted from the silting up of the floors of the temporary lakes andthe assumption of a new channel by the recreated stream. Superposition was inevitable under. Fig. 219. — Growth and drainage of the raft lakes at the Arkansas-Louisiana state line. (Veatch, U. S. Geol. Surv.) ATLANTIC AND GULF COASTAL PLAIN 539 these circumstances, the stream in certain instances flowing over projecting and now coveredTertiary spurs that have been revealed by erosion. The most notable instance of such diver-sion is in the case of the Red River itself, which has rapids immediately above main features are shown on Fig. 218. Soils Although the soils of the various districts of the Coastal Plain havebeen incidentally mentioned in the discussion of topographic and drain-age features, a connected description of their qualities is essential inunderstanding their geographic distribution and origin. The soils of the Atlantic and Gulf Coastal Plain are for the mostpart composed of sands and light sandy loams, with occasional depos-its of silts and h
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
